Grandstream Networks, Inc.
HT502
Dual FXS Port
Analog Telephone Adaptor
HT502 USER MANUAL
HT502 USER MANUAL
INDEX
GNU GPL INFORMATION .......................................................................... 5
CHANGE LOG ........................................................................................... 6
CHANGES FROM 1.0.7.6 USER MANUAL .......................................................................................... 6
CHANGES FROM 1.0.6.8 USER MANUAL .......................................................................................... 6
WELCOME ................................................................................................. 7
SAFETY COMPLIANCES ...................................................................................................................... 7
WARRANTY........................................................................................................................................... 7
CONNECT YOUR HT502 ........................................................................... 9
EQUIPMENT PACKAGING ................................................................................................................... 9
CONNECTING THE HT502 ................................................................................................................... 9
PRODUCT OVERVIEW ............................................................................ 12
SOFTWARE FEATURES OVERVIEW ................................................................................................ 12
HARDWARE SPECIFICATION ............................................................................................................ 14
BASIC OPERATIONS .............................................................................. 15
UNDERSTANDING HT502 VOICE PROMPT ..................................................................................... 15
PLACING A PHONE CALL .................................................................................................................. 16
PHONE OR EXTENSION NUMBERS.......................................................................................... 16
DIRECT IP CALLS ........................................................................................................................ 17
CALL HOLD ......................................................................................................................................... 18
CALL WAITING .................................................................................................................................... 18
CALL TRANSFER ................................................................................................................................ 18
3-WAY CONFERENCING .................................................................................................................... 19
FAX SUPPORT .................................................................................................................................... 19
CALL FEATURES .................................................................................... 21
CONFIGURATION GUIDE........................................................................ 23
CONFIGURING THE HT502 THROUGH VOICE PROMPTS ............................................................. 23
CONFIGURING THE HT502 VIA WEB BROWSER ............................................................................ 24
ACCESS THE WEB CONFIGURATION MENU ........................................................................... 24
IMPORTANT SETTINGS ..................................................................................................................... 25
NAT SETTINGS ............................................................................................................................ 25
DTMF METHODS ......................................................................................................................... 26
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PREFERRED VOCODER (CODEC) ............................................................................................ 26
ADVANCED USER CONFIGURATION ............................................................................................... 30
SAVING THE CONFIGURATION CHANGES...................................................................................... 42
REBOOTING THE HT502 FROM REMOTE ....................................................................................... 43
CONFIGURATION THROUGH A CENTRAL SERVER ....................................................................... 43
SOFTWARE UPGRADE ........................................................................... 44
FIRMWARE UPGRADE THROUGH TFTP/HTTP/HTTPS .................................................................. 44
INSTRUCTIONS LOCAL FIRMWARE UPGRADE: ............................................................................. 45
CONFIGURATION FILE DOWNLOAD ................................................................................................ 45
FIRMWARE AND CONFIGURATION FILE PREFIX AND POSTFIX .................................................. 46
MANAGING FIRMWARE AND CONFIGURATION FILE DOWNLOAD .............................................. 46
RESTORE FACTORY DEFAULT SETTING ............................................. 47
FACTORY RESET ............................................................................................................................... 47
RESET BUTTON ................................................................................................................................. 47
IVR COMMAND ................................................................................................................................... 47
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TABLE OF FIGURES
HT502 User Manual
FIGURE 1: CONNECTING THE HT502 ..................................................................................................... 10
FIGURE 2: HT502 CONNECTION DIAGRAM............................................................................................ 11
FIGURE 3: UPLINK/DOWNLINK BANDWIDTH LIMITATION ................................................................... 29
TABLE OF TABLES
HT502 User Manual
TABLE 1: DEFINITIONS OF THE HT502 CONNECTORS ....................................................................... 10
TABLE 2: DEFINITIONS OF THE HT502 LEDS ........................................................................................ 10
TABLE 3: HT502 TECHNICAL SPECIFICATIONS .................................................................................... 12
TABLE 4: HT502 HARDWARE SPECIFICATION ...................................................................................... 14
TABLE 5: HT502 IVR MENU DEFINITIONS .............................................................................................. 15
TABLE 6: HT502 CALL FEATURES .......................................................................................................... 21
TABLE 7: BASIC SETTINGS ..................................................................................................................... 26
TABLE 8: STATUS PAGE ........................................................................................................................... 29
TABLE 9: ADVANCED SETTINGS ............................................................................................................ 31
TABLE 10: ACCOUNT SETTINGS ............................................................................................................ 35
CONFIGURATION GUI INTERFACE EXAMPLES
HT502 User Manual
(http://www.grandstream.com/products/ht_series/ht502/documents/ht502_gui.zip)
1. SCREENSHOT OF ADVANCED USER CONFIGURATION PAGE
2. SCREENSHOT OF BASIC SETTINGS CONFIGURATION PAGE
3. SCREENSHOT OF FXS PORT 1 CONFIGURATION LOGIN PAGE
4. SCREENSHOT OF FXS PORT 2 CONFIGURATION PAGE
5. SCREENSHOT OF STATUS PAGE
6. SCREENSHOT OF LOGIN PAGE
7. SCREENSHOT OF REBOOT PAGE
8. SCREENSHOT OF REBOOTING PAGE
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GNU GPL INFORMATION
HT502 firmware contains third-party software licensed under the GNU General Public License (GPL).
Grandstream uses software under the specific terms of the GPL. Please see the GNU General Public
License (GPL) for the exact terms and conditions of the license.
Grandstream GNU GPL related source code can be downloaded from Grandstream web site from:
http://www.grandstream.com/support/faq/gnu_gpl .
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CHANGE LOG
This section documents significant changes from previous versions of HT502 user manuals. Only major
new features or major document updates are listed here. Minor updates for corrections or editing are not
documented here.
CHANGES FROM 1.0.7.6 USER MANUAL

Added option to enable/disable SIP NOTIFY Authentication. [Disable SIP NOTIFY Authentication]

Added option [Use Configured IP ] in DNS mode. Added configurable parameter [Primary IP][Backup
IP1][Backup IP2]

Added option to set [Reregister before Expiration]
CHANGES FROM 1.0.6.8 USER MANUAL

Added the option to enable/disable hook flash. [Enable Hook Flash]

Added two CPE SSL configuration [CPE SSL Certificate][CPE SSL Private Key]

Added a configuration parameter to set the [Connection Request Port]

Removed DHCP Domain from Web UI

Removed Enable Ring-transfer from Web UI

Added a configuration parameter to set the [Offhook Auto-Dial Delay]

Changed the SSL Web UI decription to [SIP TLS Certificate][SIP TLS Private Key] and [SIP TLS Private
Key Password]

Added [CPE] version to Software Version on Web UI
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WELCOME
Thank you for purchasing Grandstream’s HT502, the affordable, feature rich Analog Telephone Adaptor.
Grandstream HandyTone502 is a new addition to the popular HandyTone ATA product family. It features
the rich audio quality, a broad range of voice codecs, and functionality of the HT502, including two (2)
FXS ports each with independent SIP accounts.
This manual will help you learn how to operate and manage your HandyTone502 Analog Telephone
Adaptor and make the best use of its many upgraded features including simple and quick installation, 3way conferencing, and direct IP-IP Calling. This HT502 is very easy to manage and configure, and is
specifically designed to be an easy to use and affordable VoIP solution for both the residential user and
the teleworker.
SAFETY COMPLIANCES
The HT502 phone complies with FCC/CE and various safety standards. The HT502 power adaptor is
compliant with UL standard. Only use the universal power adapter provided with the HT502 package.
The manufacturer’s warranty does not cover damages to the phone caused by unsupported power
adaptors.
WARRANTY
If you purchased your HT502 from a reseller, please contact the company where you purchased your
device for replacement, repair or refund. If you purchased the product directly from Grandstream, contact
your Grandstream Sales and Service Representative for a RMA (Return Materials Authorization) number
before you return the product. Grandstream reserves the right to remedy warranty policy without prior
notification.
Caution: Changes or modifications to this product not expressly approved by Grandstream, or operation
of this product in any way other than as detailed by this User Manual, could void your manufacturer
warranty. Please do not use a different power adaptor with the HT502 as it may cause damage to the
products and void the manufacturer warranty.
This document contains links to HT502 GUI Interfaces.
Please download these examples from
http://www.grandstream.com/products/ht_series/ht502/documents/ht502_gui.zip for your reference.
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This document is subject to change without notice. The latest electronic version of this user manual is
available for download at:
http://www.grandstream.com/products/ht_series/ht502/documents/ht502_usermanual_english.pdf
Reproduction or transmittal of the entire or any part, in any form or by any means, electronic or print, for
any purpose is not permitted without the express written permission of Grandstream Networks, Inc.
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CONNECT YOUR HT502
EQUIPMENT PACKAGING
The HT502 ATA package contains:

One HT502 Main Case

One Universal Power Adaptor

One Ethernet Cable

One HT502 Vertical Stand
CONNECTING THE HT502
The HT502 is designed for easy configuration and easy installation. Configure the HT502 following the
directions in the Configuration section of this manual.
1. Connect a standard touch-tone analog telephone to the PHONE port.
2. Insert a standard RJ11 telephone cable into the Phone1 port and connect the other end of the
telephone cable to the analog telephone.
3. Insert the Ethernet cable into the WAN port of HT502 and connect the other end of the Ethernet
cable to an uplink port (a router or a modem, etc.)
4. Connect a PC to the LAN port of HT502 if it is being used as a router.
5. Insert the power adapter into the HT502 and connect it to a wall outlet.
The HT502 Analog Telephone Adaptor is an all-in-one VoIP integrated device designed to be a total
solution for networks providing VoIP services. The HT502 VoIP features and functions are available using
a regular analog telephone.
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HT-502
Front View
HT-502
Back View
RJ-45 Ports
10/100 Mbps
Display LEDs
(green)
Reset
Power
Supply
(12V)
RJ-11 FXS Ports
(Phone)
FIGURE 1: CONNECTING THE HT502
The HT502 has two FXS port. Both FXS ports can have a separate SIP account. This is a key feature of
HT502 as it supports simultaneous calls on both FXS ports.
TABLE 1: DEFINITIONS OF THE HT502 CONNECTORS
Power Cable
Power adapter connection
WAN Port (RJ-45)
Connect to the internal LAN network or router.
LAN Port (RJ-45)
Connect the LAN port with an Ethernet cable to your PC.
RESET
Factory Reset button. Press for 7 seconds to reset factory default settings.
PHONE1 (RJ-11)
FXS port to be connected to analog phones / fax machines.
PHONE2 (RJ-11)
FXS port to be connected to analog phones / fax machines.
There are five (5) LED buttons that help you manage the status of your HandyTone.
TABLE 2: DEFINITIONS OF THE HT502 LEDS
LEDs
POWER LED
Indicates Power. Remains ON when power is connected
WAN LED
Indicates LAN (or WAN) port activity
LAN LED
Indicates PC (or LAN) port activity
PHONE1 / PHONE2 LED
Indicate status of the respective FXS Ports-PHONE1 /
PHONE2 on the back panel
Busy – ON (Solid Green)
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Available – OFF
Slow blinking FXS LEDs indicates voicemail for that port.
NOTE: All LEDs display green when ON. Slow blinking of WAN and LAN LED together indicate the
product in firmware upgrading or provision state.
Internet
ADSL/Cable
Modem Ethernet
Analog Phone
FXS
Cordless
Phone
Analog Phone
WAN
FXS
LAN
Fax
Cordless
Phone
Fax
FIGURE 2: HT502 CONNECTION DIAGRAM
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PRODUCT OVERVIEW
The HT502 is a full feature voice and fax-over IP device that offers a high-level of integration including
dual 10M/100Mbps network ports with integrated router, NAT, DHCP server, dual port FXS telephone
gateway, market-leading sound quality, rich functionalities, and a compact and lightweight design. The
VoIP network signaling protocol supported is SIP. The HT502 fully compatible with SIP industry standard
and can interoperate with many other SIP compliant devices and software on the market. Moreover, it
supports comprehensive voice codecs including G.711 (a/µ-law), G.723.1, G.726 (16/24/32/40 bit rates),
AAL2 (all G.726), G.729A/B/E and iLBC.
SOFTWARE FEATURES OVERVIEW

2 FXS ports

Two RJ-45 ports (switched or routed)

2 SIP accounts & profiles

Supports Voice Codecs:
G711(a/µ, Annex I & II), G723.1A, G726 (ADPCM with 16/24/32/40 bit rates), G729 A/B/E, iLBC

T.38 Fax

Comprehensive Dial Plan support for Outgoing calls.

G.168 Echo Cancellation

Voice Activation Detection (VAD), Comfort Noise Generation (CNG), and Packet Loss
Concealment (PLC)

Supports PSTN/PBX analog telephone sets or analog trunks
TABLE 3: HT502 TECHNICAL SPECIFICATIONS
Telephone Interfaces
2 FXS ports, 2 SIP accounts
Network Interface
1 RJ45 for LAN, 10/100 Base-TX, Full Duplex
1 RJ45 for WAN,10/100Base-TX, Full Duplex
LED Indicators
Power, WAN, LAN, PHONE1 and PHONE2
Reset Button
Factory Reset button
Voice over Packet
Voice Activity Detection (VAD) with CNG (comfort noise generation) and PLC (packet
Capabilities
loss concealment), Dynamic Jitter Buffer, Modem detection & auto-switch to G.711,
Packetized Voice Protocol Unit (supports RTP and AAL2 protocol), G.168 compliant
Echo Cancellation, LEC (line echo cancellation) with NLP, Asymmetric RTP stream
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Voice Compression
G.711 + Annex I (PLC), Annex II (VAD/CNG format) encoder and decoder, G.723.1A,
G.726(ADPCM), G.729A/B/E, iLBC, G.726 provides proprietary VAD, CNG, and signal
power estimation, Voice Play Out unit (reordering, fixed and adaptive jitter buffer, clock
synchronization), AGC (automatic gain control), Status output, Decoder controlling via
voice packet header
DHCP Server/Client
Yes, NAT Router or Switched Mode
Telnet Server
Yes
Fax over IP
T.38 compliant Group 3 Fax Relay up to 14.4kpbs and auto-switch to G.711 for Fax
Pass-through, Fax Datapump V.17, V.19, V.27ter, V.29 for T.38 fax relay
QoS
Diffserve, TOS, 802.1 P/Q VLAN tagging
IP Transport
RTP
DTMF Method
Flexible DTMF transmission method, user interface of In-audio, RFC2833, and/or SIP
Info
IP Signaling
SIP (RFC 3261)
Provisioning
TFTP, HTTP, HTTPS
Control
TLS/SIPS , SIP over TCP/TLS
Device Management
Web interface or via secure encrypted AES or non-encrypted central configuration file
for mass deployment, Auto/manual provisioning system or via built-in IVR.
NAT-friendly remote software upgrade (via TFTP/HTTP/HTTPS) for deployed devices
including behind firewall/NAT. Syslog support
Dial Plan
Yes
UPnP
Yes
Universal Switching
Input: 100–240 VAC/50-60 Hz 0.3A Max
Power Adaptor
Output: 12VDC, 0.5A, UL certified
Environmental
Operational: 32 –104 F or 0 –40 C
o
o
o
o
o
o
Storage: 10 –130 F / Humidity: 10–90% Non-condensing
Dimensions
115mm (L) x 75mm (W) x 27mm (H)
(H x W x D)
Short Haul Loop
3RENs, Up to 150feet on 24 AWG wire
Call Handling Features
Caller ID display or block, Call waiting caller ID, Call waiting/flash, Call transfer, hold,
forward, mute, 3-way conferencing, message waiting, Do-Not-Disturb (DND), call-return
service
Caller ID
Bellcore Type 1 & 2, ETSI, BT, NTT, and DTMF-based CID
Polarity Reversal / Wink
Yes
EMC
EN55022/EN55024 and FCC part15 Class B
Safety
UL
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HARDWARE SPECIFICATION
The table below lists the hardware specification of HT502.
TABLE 4: HT502 HARDWARE SPECIFICATION
LAN Interface
2 x RJ45 10/100Mbps (integrated router)
LED
5 LEDs (GREEN)
Universal Switching
Input: 100-240V AC, 50/60Hz, 0.5A Max
Power Adaptor
Output: 12V DC, 0.5A
UL certified
Dimension
115mm (L) x 75mm (W) x 27mm (H)
Weight
94 g (0.21lbs)
Temperature
32~104°F / 0~40°C
Humidity
10% - 90% (non-condensing)
Compliance
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BASIC OPERATIONS
UNDERSTANDING HT502 VOICE PROMPT
HT502 has a built-in voice prompt menu for simple device configuration. The IVR menu and the LED
button work with any of the FXS port. Pick up the handset and dial “***” to use the IVR menu.
TABLE 5: HT502 IVR MENU DEFINITIONS
Menu
Voice Prompt
Options
Main Menu
“Enter a Menu Option”
Press “*” for the next menu option
Press “#” to return to the main menu
Enter 01-05, 07,10, 12-17,47 or 99 menu options
01
“DHCP Mode”,
Press “9” to toggle the selection
“Static IP Mode”
If using “Static IP Mode”, configure the IP address information using
menus 02 to 05.
If using “Dynamic IP Mode”, all IP address information comes from
the DHCP server automatically after reboot.
02
“IP Address “ + IP address
The current WAN IP address is announced
If using “Static IP Mode”, enter 12 digit new IP address. You need to
reset the HT to take affect the new IP address.
03
“Subnet “ + IP address
Same as menu 02
04
“Gateway “ + IP address
Same as menu 02
05
“DNS Server “ + IP address
Same as menu 02
07
Preferred Vocoder
Press “9” to move to the next selection in the list:

PCM U / PCM A

iLBC

G-726

G-723

G-729
10
“MAC Address”
Announces the Mac address of the unit.
12
WAN Port Web Access
Press “9” to toggle between enable / disable
13
Firmware Server IP
Announces current Firmware Server IP address. Enter 12 digit new
Address
IP address.
Configuration Server IP
Announces current Config Server Path IP address. Enter 12 digit
Address
new IP address.
Upgrade Protocol
Upgrade protocol for firmware and configuration update. Press “9” to
14
15
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toggle between TFTP / HTTP / HTTPS
16
Firmware Version
Firmware version information.
17
Firmware Upgrade
Firmware upgrade mode. Press “9” to toggle among the following
three options:
- always check
- check when pre/suffix changes
- never upgrade
47
“Direct IP Calling”
Enter the target IP address to make a direct IP call, after dial tone.
(See “Make a Direct IP Call”.)
70
Phone calls between FXS 1
User can make internal calls between two FXS ports on the same
and FXS 2 port
HT502 even without being registered to SIP server. By dialing *** and
70 user can reach the other FXS port
86
Voice Mail
Number of Voice Mails
99
“RESET”
Press “9” to reboot the device
Enter MAC address to restore factory default setting
(See Restore Factory Default Setting section)
“Invalid Entry”
Automatically returns to main menu
“Device not registered”
This prompt will be played immediately after off hook If the device is
not register and the option “Outgoing Call without Registration” is in
NO
Five Success Tips when using the Voice Prompt
1. “*” shifts down to the next menu option
2. “#” returns to the main menu
3. “9” functions as the ENTER key in many cases to confirm an option
4. All entered digit sequences have known lengths - 2 digits for menu option and 12 digits for IP
address. For IP address, add 0 before the digits if the digits are less than 3 (i.e. - 192.168.0.26
should be key in like 192168000026. No decimal is needed).
5. Key entry can not be deleted but the phone may prompt error once it is detected
PLACING A PHONE CALL
PHONE OR EXTENSION NUMBERS
1. Dial the number directly and wait for 4 seconds (Default “No Key Entry Timeout”); or
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2. Dial the number directly and press # (Use # as dial key” must be configured in web configuration).
Examples:
1. Dial an extension directly on the same proxy, (e.g. 1008), and then press the # or wait for 4 seconds.
2. Dial an outside number (e.g. (626) 666-7890), first enter the prefix number (usually 1+ or international
code) followed by the phone number. Press # or wait for 4 seconds. Check with your VoIP service
provider for further details on prefix numbers.
DIRECT IP CALLS
Direct IP calling allows two parties, that is, a FXS Port with an analog phone and another VoIP Device, to
talk to each other in an ad hoc fashion without a SIP proxy.
Elements necessary to completing a Direct IP Call:
1. Both HT502 and other VoIP Device, have public IP addresses, or
2. Both HT502 and other VoIP Device are on the same LAN using private IP addresses, or
3. Both HT502 and other VoIP Device can be connected through a router using public or private IP
addresses (with necessary port forwarding or DMZ).
HT502 supports two ways to make Direct IP Calling:
Using IVR
1. Pick up the analog phone then access the voice menu prompt by dial “***”
2. Dial “47” to access the direct IP call menu
3. Enter the IP address after the dial tone and voice prompt “Direct IP Calling”
Using Star Code
1. Pick up the analog phone then dial “*47”
2. Enter the target IP address.
Note: NO dial tone will be played between step 1 and 2.
Destination ports can be specified using “*” (encoding for “:”) followed by the port number.
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Examples of Direct IP Calls:
a) If the target IP address is 192.168.0.160, the dialing convention is
*47 or Voice Prompt with option 47, then 192*168*0*160.
followed by pressing the “#” key if it is configured as a send key or wait 4 seconds. In this case,
the default destination port 5060 is used if no port is specified.
b) If the target IP address/port is 192.168.1.20:5062, then the dialing convention would be:
*47 or Voice Prompt with option 47, then 192*168*0*160*5062 followed by pressing the “#” key
if it is configured as a send key or wait for 4 seconds.
NOTE: When completing direct IP call, the “Use Random Port” should set to “NO”. You cannot make
direct IP calls between FXS1 to FXS2 since they are using same IP.
CALL HOLD
Place a call on hold by pressing the “flash” button on the analog phone (if the phone has that button).
Press the “flash” button again to release the previously held Caller and resume conversation. If no “flash”
button is available, use “hook flash” (toggle on-off hook quickly). You may drop a call using hook flash.
CALL WAITING
Call waiting tone (3 short beeps) indicates an incoming call, if the call waiting feature is enabled. Toggle
between incoming call and current call by pressing the “flash” button. First call is placed on hold. Press
the “flash” button to toggle between two active calls.
CALL TRANSFER
Blind Transfer
Assume that call Caller A and B are in conversation. A wants to Blind Transfer B to C:
3. Caller A presses FLASH on the analog phone to hear the dial tone.
4. Caller A dials *87 then dials caller C’s number, and then # (or wait for 4 seconds)
5. Caller A will hear the confirm tone. Then, A can hang up.
NOTE: “Enable Call Feature” must be set to “Yes” in web configuration page.
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Attended Transfer
Assume that Caller A and B are in conversation. Caller A wants to Attend Transfer B to C:
1. Caller A presses FLASH on the analog phone for dial tone.
2. Caller A then dials Caller C’s number followed by # (or wait for 4 seconds).
3. If Caller C answers the call, Caller A and Caller C are in conversation. Then A can hang up to
complete transfer.
4. If Caller C does not answer the call, Caller A can press “flash” to resume call with Caller B.
NOTE: When Attended Transfer fails and A hangs up, the HT502 will ring back user A to remind A that B
is still on the call. A can pick up the phone to resume conversation with B.
3-WAY CONFERENCING
The HT502 supports Bellcore style 3-way Conference.
Instructions for 3-way conference:
Assume that call party A and B are in conversation. Caller A(HT502) wants to bring third Caller C into
conference:
1. A presses FLASH (on the analog phone, or Hook Flash for old model phones) to get a dial tone.
2. A dials C’s number then # (or wait for 4 seconds).
3. If C answers the call, then A presses FLASH to bring B, C in the conference.
4. If C does not answer the call, A can press FLASH back to talk to B.
5. If A presses FLASH during conference, C will be dropped out.
6. If A hangs up, the conference will be terminated for all three parties when configuration “Transfer
on Conference Hangup” is set to “No”. If the configuration is set to “Yes”, A will transfer B to C so
that B and C can continue the conversation.
FAX SUPPORT
HT502 supports FAX in two modes: 1) T.38 (Fax over IP) and 2) fax pass through. T.38 is the preferred
method because it is more reliable and works well in most network conditions. If the service provider
supports T.38, please use this method by selecting Fax mode to be T.38 (default). If the service provider
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does not support T.38, pass-through mode can be used.
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CALL FEATURES
The HT502 supports all the traditional and advanced telephony features.
TABLE 6: HT502 CALL FEATURES
Key
Call Features
*02
Forcing a Codec (per call) *027110 (PCMU), *027111 (PCMA), *02723 (G723), *02729 (G729),
*0272616 (G726-r16), *0272624 (G724-r24), *0272632 (G726-r32), *0272640 (G726-r40),
*027201 (iLBC)
*03
Disable LEC (pe call) Dial “*03” + ” number ”. No dial tone is played in the middle.
*16
Enable SRTP
*17
Disable SRTP
*30
Block Caller ID (for all subsequent calls)
*31
Send Caller ID (for all subsequent calls)
*47
Direct IP Calling. Dial “*47” + “IP address”. No dial tone is played in the middle. Detail see Direct
IP Calling section on page 12.
*50
Disable Call Waiting (for all subsequent calls)
*51
Enable Call Waiting (for all subsequent calls)
*67
Block Caller ID (per call). Dial “*67” + ” number ”. No dial tone is played in the middle.
*82
Send Caller ID (per call). Dial “*82” + ” number ”. No dial tone is played in the middle.
*69
Call Return Service: Dial *69 and the phone will dial the last incoming phone number received.
*70
Disable Call Waiting (per call). Dial “*70” + ” number ”. No dial tone is played in the middle.
*71
Enable Call Waiting (per call). Dial “*71” + ” number ”. No dial tone is played in the middle.
*72
Unconditional Call Forward: Dial “*72” and then the forwarding number followed by “#”. Wait for
dial tone and hang up. (dial tone indicates successful forward)
*73
Cancel Unconditional Call Forward. To cancel “Unconditional Call Forward”, dial “*73”, wait for
dial tone, then hang up.
*74
Enable Paging Call: Dial “*74” and then the destination phone number you want to page.
*78
Enable Do Not Disturb (DND): When enabled all incoming calls are rejected.
*79
Disable Do Not Disturb (DND): When disabled, incoming calls are accepted.
*87
Blind Transfer
*90
Busy Call Forward: Dial “*90” and then the forwarding number followed by “#”. Wait for dial tone
then hang up.
*91
Cancel Busy Call Forward. To cancel “Busy Call Forward”, dial “*91”, wait for dial tone, then
hang up.
*92
Delayed Call Forward. Dial “*92” and then the forwarding number followed by “#”. Wait for dial
tone then hang up.
*93
Cancel Delayed Call Forward. To cancel Delayed Call Forward, dial “*93”, wait for dial tone, then
hang up.
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Flash/Hook
Toggles between active call and incoming call (call waiting tone). If not in conversation, flash/hook
will switch to a new channel for a new call.
#
Pressing pound sign will serve as Re-Dial key.
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CONFIGURATION GUIDE
CONFIGURING THE HT502 THROUGH VOICE PROMPTS
DHCP MODE
Select voice menu option 01 to enable HT502 to use DHCP.
STATIC IP MODE
Select voice menu option 01 to enable HT502 to use STATIC IP mode, then use option 02, 03, 04, 05 to
set up IP address, Subnet Mask, Gateway and DNS server respectively.
FIRMWARE SERVER IP ADDRESS
Select voice menu option 13 to configure the IP address of the firmware server.
CONFIGURATION SERVER IP ADDRESS
Select voice menu option 14 to configure the IP address of the configuration server.
UPGRADE PROTOCOL
Select voice menu option 15 to choose firmware and configuration upgrade protocol. User can choose
between TFTP and HTTP.
FIRMWARE UPGRADE MODE
Select voice menu option 17 to choose firmware upgrade mode among the following three options:
1) always check, 2) check when pre/suffix changes, and 3) never upgrade
WAN PORT WEB ACCESS
Select voice menu option 12 to enable WAN Port Wed Access of the device configuration pages.
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CONFIGURING THE HT502 VIA WEB BROWSER
HT502 has an embedded Web server that will respond to HTTP GET/POST requests. It also has
embedded HTML pages that allow users to configure the HT502 through a web browser such as
Microsoft’s IE, AOL’s Netscape or Mozilla Firefox installed on Windows or Unix OS. (Macintosh OS is not
included).
ACCESS THE WEB CONFIGURATION MENU
The HT502 HTML configuration page can be accessed via LAN or WAN ports.
•
FROM THE LAN PORT:
1. Directly connect a computer to the LAN port
2. Open a command window on the computer
3. Type in “ipconfig /release”, the IP address etc becomes 0
4. Type in “ipconfig /renew”, the computer gets an IP
address in 192.168.2.x segment by
default
5. Open a web browser, type in the default IP address of the LAN port. http://192.168.2.1. You
will see the log in page of the device.
•
FROM THE WAN PORT:
1. Follow table 4 to find the WAN side IP address.
2. Open a web browser, type in the WAN side IP address – for example:
http://HT502-WAN-IP-Address
Note:
•
WAN side HTTP access is disabled by default for security reason. You can enable HTTP access
on the configuration page by setting “WAN side HTTP access” to be YES.
•
Initial access to the configuration pages is always from the LAN port. The instructions are listed
above.
•
The IVR announces 12 digits IP address, you need to strip out the leading “0” in the IP address.
For ex. IP address: 192.168.001.014, you need to type in http://192.168.1.14 in the web browser.
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Once the HTTP request is entered and sent from a web browser, the user will see a log-in screen. There
are two default passwords for the login page:
User Level:
Password:
Web pages allowed:
End User Level
123
Only Status and Basic Settings
Administrator Level
admin
Browse all pages
The password is case sensitive with maximum length of 25 characters. The factory default password for
End User and administrator is “123” and “admin” respectively. Only an administrator can access the
“ADVANCED SETTING”, “FXS PORTs” configuration pages. Please reference the GUI pages using the
following link: http://www.grandstream.com/products/ht_series/ht502/documents/ht502_gui.zip .
NOTE: If you cannot log into the configuration page by using the default password, please check with
the VoIP service provider. It is most likely the VoIP service provider has provisioned the device and
configured for you therefore the password has already been changed.
IMPORTANT SETTINGS
The end-user must configure the following settings according to the local environment.
NOTE: Most
settings on the web configuration pages are set to the default values.
NAT SETTINGS
If you plan to keep the gateway within a private network behind a firewall, we recommend using STUN
Server. The following three (3) settings are useful in the STUN Server scenario:
1. STUN Server (under Advanced Settings webpage)
Enter a STUN Server IP (or FQDN) that you may have, or look up a free public STUN Server on the
internet and enter it on this field. If using Public IP, keep this field blank.
2. Use Random Ports (under Advanced Settings webpage)
This setting depends on your network settings. Generally if you have multiple IP devices under the
same network, it should be set to Yes. If using a Public IP address, set this parameter to No.
3. NAT Traversal (under the Profile web pages)
Set this to Yes when gateway is behind firewall on a private network.
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DTMF METHODS
DTMF Settings are in FXS portX pages.
 DTMF in-audio
 DTMF via RTP (RFC2833)
 DTMF via SIP INFO
Set priority of DTMF methods according to your preference. This setting should be based on your server
DTMF setting.
PREFERRED VOCODER (CODEC)
The HT502 supports a broad range of voice codecs. Under Profile web pages, choose your preferred
order of different codecs:
 PCMU/A (or G711µ/a)
 G729 A/B/E
 G723
 G726 (16/24/32/40)
 iLBC
 AAL2 (all G.726)
TABLE 7: BASIC SETTINGS
End User Password
Password to access the Web Configuration Menu. This field is case sensitive with a
maximum length of 25 characters.
Web Port
By default, HTTP uses port 80. This field is for customizable web port.
Telnet Server
Default is set to YES.
IP Address
There are two modes to operate the HT502:
DHCP mode: all the field values for the Static IP mode are not used (even though they
are still saved in the Flash memory.) The HT502 acquires its IP address from the first
DHCP server it discovers from the LAN it is connected. Using the PPPoE feature: set the
PPPoE account settings. The HT502 will establish a PPPoE session if any of the PPPoE
fields is set.
Static IP mode: configure the IP address, Subnet Mask, Default Router IP address, DNS
Server 1 (primary), DNS Server 2 (secondary) fields. These fields are set to zero by
default.
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DHCP hostname
Default is blank. This option specifies the name of the client. This field is optional but may
be required by some Internet Service Providers.
DHCP vendor class ID
Default is HT500. Used by clients and servers to exchange vendor-specific information..
PPPoE account ID
PPPoE username. Necessary if ISP requires you to use a PPPoE (Point to Point Protocol
over Ethernet) connection.
PPPoE password
PPPoE account password.
PPPoE Service Name
Default is blank. This field is optional. If your ISP uses a service name for the PPPoE
connection, enter the service name here.
Time Zone
Controls how the date/time is displayed according to the specified time zone.
Self Defined Time Zone
The syntax is std offset dst [offset],start[/time],end[/time]
Default is set to : MTZ+6MDT+5,M3.2.0,M11.1.0
MTZ+6MDT+5,
Time zone with 6 hours offset with 1 hour ahead which is the US central time. It is positive
(+) if the local time zone is west of the Prime Meridian and negative (-) if it is east.
Prime Meridian (a.k.a: International or Greenwich Meridian)
M3.2.0,M11.1.0
st
The 1 number indicates Month: 1,2,3,..,12 (for Jan, Feb, .., Dec)
The 2
nd
number indicates the n iteration of the weekday: (1st Sunday, 3rd Tuesday etc)
th
The 3
rd
number indicates Weekday: 0,1, 2, ..,6(for Sun, Mon, Tue, .., Sat)
Therefore, this example is the DST which starts from the second Sunday of March to the
1st Sunday of November.
Language
Languages supported with voice prompt and web interface, except Spanish that it is only
in IVR.
Device Mode
This parameter controls whether the device is working in NAT router mode or Bridge
mode. Save the setting and reboot prior to configuring HT502.
NAT Maximum Ports
The number of ports that can be managed while in NAT router mode.
Range: 0 – 4096, default is 1024. Typically one port per connection.
NAT TCP Timeout
NAT TCP idle timeout in seconds. Connection will be closed after preconfigured, timeout
if not refreshed. Range: 0 - 3600
NAT UDP Timeout
NAT TCP idle timeout in seconds. Connection will be closed after preconfigured, timeout
if not refreshed. Range: 0 – 3600, default is 300
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Uplink Bandwidth
The maximum uplink bandwidth permitted by the device. This function is disabled by
default. The total bandwidth can be set as: 128K, 256K, 512K, 1M, 2M, 3M, 4M, 5M, 10M
or 15M. The primary function of this setting is to limit the uplink bandwidth for the device
internal system, signaling and NATed traffic. Example: When 512k is configured, there
will be at least 512kbps limited for internal system, signaling and NATed traffic. Voice or
RTP stream will never be limited. See figure 3.
Downlink Bandwidth
The maximum downlink bandwidth permitted by the device. This function is disabled by
default. The total bandwidth can be set as: 128K, 256K, 512K, 1M, 2M, 3M, 4M, 5M, 10M
or 15M. The primary function of this setting is to limit the download bandwidth for the
device internal system, signaling and NATed traffic. Example: if 128 is configured, there
will be at least 128kbps limited for internal system, signaling and NATed traffic. Voice or
RTP stream will never be limited. See figure 3.
Enable UPnP
When set to “Yes”, the HT502 acts as an UPnP gateway for your UPnP enabled
applications. UPnP = “Universal Plug and Play”
Reply to ICMP on WAN
Default is No. When set to “Yes”, the HT502 responds to the PING command from other
Port
computers, but is also made vulnerable to DOS attacks.
WAN Side HTTP/Telnet
Default is No. When set to “Yes”, the user can access the web configuration pages
Access
through the WAN port, instead of through the PC port. Warning: this configuration is less
secure than the default option.
Cloned WAN MAC
This allows the user to change/set a specific MAC address on the WAN interface.
Address:
Note: Set in Hex format
Enable LAN DHCP
When set to “Yes”, device will function as a simple router and LAN port will provide IP
addresses to internal network. Connect the WAN port to ADSL/Cable modem or any other
equipment that provides access to public Internet.
LAN DHCP Base IP
Base IP Address for a LAN port. Default factory setting is 192.168.2.1.
Note: When the device detects WAN IP is conflicting with LAN IP, the LAN base IP
address will be changed based on the network mask -- the effective subnet will be
increased by 1. For example; 192.168.2.1 will be changed to 192.168.3.1 if net mask is
255.255.255.0. Then the device will reboot
LAN DHCP Start IP
Default value is 100. The last segment of IP address assigned to the HT50x in the LAN
Network. Default configuration assigns IP address (to local network devices) starting from
192.168.2.100.
LAN DHCP End IP
Default value is 199. This parameter allows a user to limit the number of local network
devices connected to the internal router. Default configuration assigns IP address (to
devices connected to the LAN port) in a range from 192.168.2.100 up to 192.168.2.199.
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LAN Subnet Mask
Sets the LAN subnet mask. Default value is 255.255.255.0
LAN DHCP Base IP:
Base IP address for the LAN port, which functions as default gateway for its LAN. Default
value is 192.168.2.1
DHCP IP Lease Time
Default value is 120 hrs (5 days). The length of time the IP address is assigned to the
LAN clients. Value is set in units of hours.
DMZ IP:
This function forwards all WAN IP traffic to a specific IP address if no matching port is
used by HT502 or in the defined port forwarding.
Port Forwarding
Forwards a matching (TCP/UDP) port to a specific LAN IP address with a specific
(TCP/UDP) port.
FIGURE 3: UPLINK/DOWNLINK BANDWIDTH LIMITATION
In addition to the Basic Settings configuration page, end users also have access to the Device Status
page.
TABLE 8: STATUS PAGE
MAC Address
The device ID, in HEX format. This is very important ID for ISP troubleshooting. LAN and
WAN Mac addresses will appear in this place. The LAN MAC address will be used for
provisioning and can be found on the label coming with original box and on the label
located on the bottom panel of the device.
WAN IP Address
This field shows WAN IP address of HT502.
Product Model
This field contains the product model info.
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Software Version
Program: This is the main software release. This number is always used for firmware
upgrade. Current release is 1.0.7.6 Boot and Loader are seldom changed.
Bootloader: current version is 1.0.0.9.
Core: current version 1.0.7.1
Base: current version is 1.0.7.6
CPE: current version is 1.0.1.19
System Up Time
Shows system up time since the last reboot.
PPPoE Link Up
Indicates whether the PPPoE connection is up if the HT502 is connected to DSL modem.
NAT
This filed indicates the type of NAT connection used by the HT502 via its WAN port.
Port Status
Displays relevant information regarding the each FXS port.
Port
Hook
Registration
DND
FXS1
On Hook
Registered
Yes
FXS2
On Hook
Registered
No
Busy
Delayed
Forward
Forward
Forward
613
614
• Both FXS port1 and FXS port2 are registered with this SIP Server.
• FXS Port 1 user has set Do Not Disturb.
• FXS Port 1 user has set his calls to be forwarded unconditionally to ext 613.
• FXS Port 2 user has set his calls to forward to 614 when his phone is busy.
ADVANCED USER CONFIGURATION
Log in to the advanced user configuration page the same way as for the basic configuration page.
The
password is case sensitive and the factory default password for Advanced User is “admin”.
Advanced User configuration includes the end user configuration and the advanced configurations
including: a) SIP configuration, b) Codec selection, c) NAT Traversal Setting and d) other miscellaneous
configuration. HT502 each FXS SIP account has its own configuration page. Their configurations are
identical.
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TABLE 9: ADVANCED SETTINGS
Admin Password
This contains the password to access the Advanced Web Configuration page. This field is
case sensitive. Only the administrator can configure the “Advanced Settings” page.
Password field is purposely left blank for security reasons after clicking update and saved.
The maximum password length is 25 characters.
Layer 3 QoS
This field defines the layer 3 QoS parameter which can be the value used for IP
Precedence or Diff-Serv or MPLS. Default value is 12.
Layer 2 QoS
Value used for layer 2 VLAN tag. Default setting is blank.
STUN Server
IP address or Domain name of the STUN server.
Keep-alive interval
This parameter specifies how often the HT502 sends a blank UDP packet to the SIP
server in order to keep the “hole” on the NAT open. Default is 20 seconds. Minimum
value is 20 seconds.
Use STUN to detect
Use STUN keep-alive to detect WAN side network problems. If keep-alive request does
network connectivity
not yield any response for configured number of times, the device will restart the TCP/IP
stack. If the STUN server does not respond when the device boots up, the feature is
disabled.
Firmware Upgrade
Enables HT502 to download firmware or configuration file through either the TFTP, HTTP
and Provisioning
or HTTPS server.
Via TFTP Server
This is the IP address of the configured TFTP server. If selected and it is non-zero or not
blank, the HT502 retrieves the new configuration file or new code image from the
specified TFTP server at boot time. After 5 attempts, the system will timeout and will start
the boot process using the existing code image in the Flash memory. If a TFTP server is
configured and a new code image is retrieved, the new downloaded image is saved into
the Flash memory.
Note: Please do NOT interrupt the TFTP upgrade process (especially the power supply)
as this will damage the device. Depending on the local network, this process can take up
to 15 or 20 minutes.
Via HTTP / HTTPS
The URL for the HTTP/HTTPS server used for firmware upgrade and configuration via
Server
HTTP.
For example, http://provisioning.mycompany.com:6688/Grandstream/1.0.0.67“:6688” is
the specific TCP port where the HTTP or HTTPS server is listening; it can be omitted if
using default port 80.
Note: If Auto Upgrade is set to No, HT502 will only do HTTP/HTTPS download once at
boot up.
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Firmware Server Path
IP address or domain name of firmware server.
Config Server Path
IP address or domain name of configuration server.
XML Config File
The password used for encrypting the XML configuration file using OpenSSL.
Password
This is required for the phone to decrypt the encrypted XML configuration file.
HTTP/HTTPS User
The user name needed to authenticate with the HTTP/HTTPS server.
Name
HTTP/HTTPS
The password needed to authenticate with the HTTP/HTTPS server.
Password
Firmware File Prefix
Default is blank. If configured, HT502 will request firmware file with the prefix.
This
setting is useful for ITSPs. End user should keep it blank.
Firmware File Postfix
Default is blank. End user should keep it blank.
Config File Prefix
Default is blank. End user should keep it blank.
Config File Postfix
Default is blank. End user should keep it blank.
Allow DHCP Option 66 If set to “Yes”, configuration and upgrade server information can be obtained using DHCP
to override server
option 66 from DHCP server located in customer’s environment.
Automatic Upgrade
Choose “Yes” to enable automatic upgrade and provisioning.
If select “Check every
minutes” input the amount of minutes you want it to check for update. If select “Yes, daily
at hour” make sure to input the hour of the day you want it to check for update, e.g. for 11
pm type 23. If select “Yes, weekly on day” make sure you input the day of the week (in
format 0-6, 0 is Sunday) you want it to check for update. When set to No, HT502 will only
do the following option you select; “Always check for New Firmware at Boot up” will check
for new firmware every time the device reboots. “Check New Firmware only when F/W
pre/suffix changes” will check for updates only when the pre/suffix has been changed.
Disable SIP NOTIFY
Device will not challenge NOTIFY with 401 when set to Yes.
Authentication
Authenticate Conf File If set to Yes, config file is authenticated before acceptance.
This protects the
configuration from an unauthorized change.
Firmware Key
Used for firmware encryption. Should be 32 digit in hexadecimal representation. End
user should keep it blank.
SIP TLS Certificate
The user specify SSL certificate used for SIP over TLS in X.509 format.
SIP TLS Private Key
The user specify SSL private key used for SIP over TLS in X.509 format.
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SIP TLS Private Key
User specify password to protect the private key above.
Password
ACS URL
User specify the Auto Configuration Server’s URL (TR-069 protocol)
ACS Username
User specify the ACS Username
ACS Password
User specify the ACS password
Periodic Inform
Default is No. If set to YES, device will send inform packets to the ACS
Enable
Periodic Inform
Frequency that the inform packets will be sent out to the ACS
Interval
Connection Request
Set a user name for the ACS to connect to this device
Username
Connection Request
Set a password for the ACS to connect to this device
Password
Connection Request
Set a port number for the ACS to connect to this device, default is 7547
Port
CPE SSL Certificate
Configure the SSL authentication of Customer-premises equipment
CPE SSL Private Key
Configure the SSL Private Key of Customer-premises equipment
System Ring Cadence
Configuration option is set ring cadence on all FXS ports for all incoming calls. (Syntax:
c=on1/off1-on2/off2-on3/off3(only 3 cadences maximum)) Default is set to c=2000/4000;
(US standards)
Call Progress Tones
Using these settings, users can configure tone frequencies and cadence according to
their preference. By default they are set to North American frequencies. Configure these
settings with known values to avoid uncomfortable high pitch sounds. ON is the period of
ringing (“On time” in ‘ms’) while OFF is the period of silence. In order to set a continuous
tone, OFF should be zero. Otherwise it will ring ON ms and a pause of OFF ms and then
repeat the pattern.
Example configuration for N.A. Dialtone:
f1=350@-13,f2=440@-13,c=0/0;
Syntax: f1=freq@vol, f2=freq@vol, c=on1/off1-on2/off2-on3/off3; [...]
(Note: freq: 0 - 4000Hz; vol: -30 - 0dBm)
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Prompt Tone Access
Key pattern to get Prompt Tone. Maximum 20 digits. No Default.
Code
Lock Keypad Update
If set to “Yes”, the configuration update via keypad is disabled.
Disable Voice Prompt
Default is No. Disables the voice prompt configuration.
Disable Direct IP Call
Default is No. Disables the Direct IP Call function.
NTP server
URI or IP address of the NTP (Network Time Protocol) server. This parameter
synchronizes the date and time.
NTP Update Interval
Updates the Network Time Protocol (Values range from 5 – 1440 minutes)
Syslog Server
The IP address or URL of System log server. This feature is especially useful for the ITSP
(Internet Telephone Service Provider)
Syslog Level
Select the HT502 to report the log level. Default is NONE. The level is one of DEBUG,
INFO, WARNING or ERROR. Syslog messages are sent based on the following events:
1. product model/version on boot up (INFO level)
2. NAT related info (INFO level)
3. sent or received SIP message (DEBUG level)
4. SIP message summary (INFO level)
5. inbound and outbound calls (INFO level)
6. registration status change (INFO level)
7. negotiated codec (INFO level)
8. Ethernet link up (INFO level)
9. SLIC chip exception (WARNING and ERROR levels)
10.
memory exception (ERROR level)
The Syslog uses USER facility. In addition to standard Syslog payload, it contains the
following components:
GS_LOG: [device MAC address][error code] error message
Example: May 19 02:40:38 192.168.1.14 GS_LOG: [00:0b:82:00:a1:be][000] Ethernet link
is up
Send SIP Log
If Syslog is enabled and Send SIP Log is set to YES, then SIP messages will also be
delivered via Syslog. Default is set to NO.
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Download Device
Allows user to download and save a text file containing all the P values of each setting as
Configuration
configured at that point on the unit. (Note: For Security Reasons, all Passwords won’t be
Downloaded)
TABLE 10: ACCOUNT SETTINGS
Profile Active
When set to Yes the FXS port is activated.
Primary SIP Server
SIP Server’s IP address or Domain name provided by VoIP service provider.
Failover SIP Server
Failover SIP Server’s IP address or Domain name in case primary server does not
respond.
Prefer Primary SIP
Default is no. If set to yes it will register to Primary Server if registration with Failover
Server
server expires
Outbound Proxy
IP address or Domain name of Outbound Proxy, or Media Gateway, or Session Border
Controller. Used by HT502 for firewall or NAT penetration in different network
environments. If symmetric NAT is detected, STUN will not work and ONLY outbound
proxy can correct the problem.
SIP transport
User can select UDP or TCP or TLS.
NAT Traversal (STUN)
This parameter defines whether or not the HT502 NAT traversal mechanism is
activated. If activated (by choosing “Yes”) and a STUN server is also specified, then the
HT502 performs according to the STUN client specification. Using this mode, the
embedded STUN client will detect if and what type of firewall/NAT. If the detected NAT
is a Full Cone, Restricted Cone, or a Port-Restricted Cone, the HT502 will use its
mapped public IP address and port in all of its SIP and SDP messages.
If the NAT Traversal field is set to “Yes” with no specified STUN server, the HT502 will
periodically (every 20 seconds or so) send a blank UDP packet (with no payload data)
to the SIP server to keep the “hole” on the NAT open.
SIP User ID
User account information, provided by VoIP service provider (ITSP). Usually in the form
of digit similar to phone number or actually a phone number.
Authenticate ID
SIP service subscriber’s Authenticate ID used for authentication. Can be identical to or
different from SIP User ID.
Authenticate Password
SIP service subscriber’s account password.
Name
SIP service subscriber’s name for Caller ID display.
DNS Mode
One from the 3 modes are available for “DNS Mode” configuration:
-A Record (for resolving IP Address of target according to domain name)
-SRV (DNS SRV resource records indicates how to find services for various protocols)
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-NAPTR/SRV (Naming Authority Pointer according to RFC 2915)
-Use Configured IP (Use the three configured IP address instead of any DNS query)
One mode can be chosen for the client to look up server.
The default value is “A Record”
Primary IP
Configure the primary IP for DNS Mode: Use Configured IP
Backup IP1
Configure the first backup IP for DNS Mode: Use Configured IP
Backup IP2
Configure the second backup IP for DNS Mode: Use Configured IP
Tel URI
The default setting is “Disabled”. If the phone has an assigned PSTN
Number, this field should be set to “User=Phone” then a
“User=Phone” parameter will be attached to the “From header” in the SIP
request to indicate the E.164 number. If server supports TEL URI format, then this
option needs to be selected.
SIP Registration
Controls whether the HT502 needs to send REGISTER messages to the proxy server.
The default setting is Yes.
Unregister on Reboot
Default is No. If set to Yes, the SIP user’s registration information will be cleared on
reboot.
Outgoing Call without
Default is No. If set to “Yes,” user can place outgoing calls even when not registered (if
Registration
allowed by Internet Telephone Service Provider) but is unable to receive incoming calls.
Register Expiration
This parameter allows the user to specify the time frequency (in minutes) the HT502
refreshes its registration with the specified registrar. The default interval is 60 minutes
(or 1 hour). The maximum interval is 65535 minutes (about 45 days).
Reregister before
This parameter allows the user to specify the reregisteration time before expiration.
Expiration
Registration Retry Wait
Retry registration if the process failed. Default is 30 seconds.
Time
Local SIP port
Defines the local SIP port the HT502 will listen and transmit. The default value for FXS
port 1 is 5060. The default value for FXS port 2 is 5062.
Local RTP port
Defines the local RTP port pair the HT502 will listen and transmit. The default value for
FXS port 1 is 5004. The default value for FXS port 2 is 5012.
Use Random Port
This parameter forces the random generation of both the local SIP and RTP ports when
set to Yes. This is usually necessary when multiple HT502 are behind the same NAT.
Refer to Use Target
Default is NO. If set to YES, then for Attended Transfer, the “Refer-To” header uses the
Contact
transferred target’s Contact header information.
Transfer on Conference
Default is No. In which case if the conference originator hangs up the conference will
Hang up
be terminated. When option YES is chosen, originator will transfer other parties to
FIRMWARE VERSION 1.0.9.1
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each other so that B and C can choose either to continue the conversation or
hang up.
Disable Bellcore Style
Default is No. you can make a Conference by pressing ‘Flash’ key. If set to Yes, you
3-Way Conference
need to dial *23 + second callee number.
Remove OBP from
Default is No. When option YES is chosen, the Out Bound Proxy will be removed from
Route Header
Route header.
Support SIP Instance ID
Default is Yes. If set to Yes, the contact header in REGISTER request will contain SIP
Instance ID as defined in IETF SIP Outbound draft.
Validate incoming SIP
Default is No. If set to yes all incoming SIP messages will be strictly validated
message
according to RFC rules. If message will not pass validation process, call will be
rejected.
Check SIP User ID for
Default is No. Check the incoming SIP User ID in Request URI. If they don’t match, the
incoming INVITE
call will be rejected. If this option is enabled, the device will not be able to make direct
IP calls.
SIP T1 Timeout
T1 is an estimate of the round-trip time between the client and server transactions.
If the network latency is high, select larger value for more reliable usage.
SIP T2 Interval
Maximum retransmission interval for non-INVITE requests and INVITE responses.
DTMF Payload Type
Sets the payload type for DTMF using RFC2833.
Preferred DTMF method
The HT502 supports up to 3 different DTMF methods including in-audio, via RTP
(RFC2833) and via Sip Info. The user can configure DTMF method in a priority list.
Disable DTMF
Default is No. If set to yes, use above DTMF order without negotiation
Negotiation
DTMF via RFC2833
Send DTMF via RTP (According to RFC 2833).
DTMF via SIP INFO
Send DTMF via SIP INFO message.
Send Flash Event
Default is No. If set to yes, flash will be sent as DTMF event.
Enable Call Features
Default is Yes. (If Yes, call features using star codes will be supported locally)
Offhook Auto-Dial
This parameter allows users to configure a User ID or extension number that is
automatically dialed when off-hook. Only the user part of a SIP address needs is
entered here. The HT502 will automatically append the “@” and the host portion of the
corresponding SIP address.
Offhook Auto-Dial
Configure the delay time for offhook auto-dial function. Range is 0-60 seconds,
Delay
default is 0.
Proxy-Require
SIP Extension to notify SIP server that the unit is behind the NAT/Firewall.
Use NAT IP
NAT IP address used in SIP/SDP message. Default is blank.
Use SIP User-Agent
Used to replace SIP User-Agent Header (No Default)
Header
Distinctive Ring Tone
Custom Ring Tone 1 to 3 with associate Caller ID: when selected, if Caller ID is
FIRMWARE VERSION 1.0.9.1
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configured, then the device will ONLY uses this ring tone when the incoming call is from
the Caller ID. System Ring Tone is used for all other calls. When selected but no Caller
ID is configured, the selected ring tone will be used for all incoming calls. Distinctive
ring tones can be configured not only for matching a whole number, but also for
matching prefixes. In this case symbol * (star) will be used.
For example:
if configured as *617, Ring Tone 1 will be used in case of call arrived from the area
code 617. Any other incoming call will ring using cadence defined in parameter System
Ring Cadence located under Advanced Settings Configuration page.
Note: If server supports Alert-Info header and standard ring tone set (Bellcore) or
distinctive ring tone 1-10 is specified, then the ring tone in the Alert-Info header from
server will be used. Bellcore rings and tones are independent from custom ring tones.
The custom ring tones can also be specified by alert-info header, for example
Alert-Info: <http://127.0.0.1>;info=ring5
Disable Call Waiting
Default is No. If set to YES Call Waiting indication information will not be provided to
analog phone connected to this FXS port.
Disable Call-Waiting
Default is No. If set to YES Call Waiting caller ID will not be provided to analog phone
Caller ID
connected to this FXS port.
Disable Call Waiting
Default is No. This is to disable the stutter Call Waiting Tone when a Call Waiting
Tone
information arrives. The CWCID information will still be displayed.
Disable Reminder Ring
Default is No. Do not play the reminder ring when this is set to Yes.
for On-Hold Call
Disable Visual MWI
If set to “Yes”, the MWI information will not be transferred to the analog phone
connected to the FXS port.
Ring Timeout
Incoming call will stop ringing when not picked up given a specific period of time.
Delayed Call Forward
Default value is 20 seconds. In case this feature activated using * codes (*92 code), the
Wait Time
call will be forwarded after this preconfigured amount of time.
No Key Entry Timeout
Default is 4 seconds. Dialing process is completed and outgoing call is initiated if no
key entry occurs during this preconfigured interval.
Early Dial
Default is No. Use only if proxy supports 484 response.
This parameter controls
whether the phone will send an early INVITE each time a key is pressed when a user
dials a number. If set to “Yes”, an INVITE is sent using the dial-number collected thus
far; Otherwise, no INVITE is sent until the “(Re-)Dial” button is pressed or after about 5
seconds have elapsed if the user forgets to press the “Re-Dial” button.
The “Yes” option should be used ONLY if there is a SIP proxy configured and the proxy
server supports 484 Incomplete Address response. Otherwise, the call will likely be
rejected by the proxy (with a 404 Not Found error).
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This feature does NOT work with and should NOT be enabled for direct IP-to-IP calling.
Dial Plan Prefix
Sets the prefix added to each dialed number.
Use # as Dial Key
Allows users to configure the “#” key as the “Send” (or “Dial”) key. If set to “Yes”, “#”
will send the number. In this case, this key is essentially equivalent to the “Dial” key. If
set to “No”, this “#” key can be included as part of number.
Dial Plan
Dial Plan Rules:
1. Accept Digits: 1,2,3,4,5,6,7,8,9,0 , *, #, A,a,B,b,C,c,D,d
2. Grammar: x - any digit from 0-9;

xx+ - at least 2 digits number;

xx. – at least 2 digit number.

^ - exclude;

[3-5] - any digit of 3, 4, or 5;

[147] - any digit 1, 4, or 7;

<2=011> - replace digit 2 with 011 when dialing

< =1> - add a leading 1 to all numbers dialed, vice versa will
remove a 1 from the number dialed

| - or
• Example 1: {[369]11 | 1617xxxxxxx} – Allow 311, 611, 911, and any 11 digit
numbers with leading digits 1617
Example 2: {^1900x+ | <=1617>xxxxxxx} – Block any number of leading digits
1900 and add prefix 1617 for any dialed 7 digit numbers
•
Example 3: {1xxx[2-9]xxxxxx | <2=011>x+} –Allow any combinations of numbers
with 11 digits which has a leading digit 1, but 5th digit cannot be 0 or 1. Or any length
of numbers with a minimum of 2 digits beginning with 2, with the leading digit
replaced with 011.
3. Default: Outgoing - {x+}
Example of a simple dial plan used in a Home/Office in the US:
{ ^1900x. | <=1617>[2-9]xxxxxx | 1[2-9]xx[2-9]xxxxxx | 011[2-9]x. | [3469]11 }
Explanation of example rule (reading from left to right):
• ^1900x. - prevents dialing any number started with 1900
• <=1617>[2-9]xxxxxx - allows dialing to local area code (617) numbers by dialing
7 numbers and 1617 area code will be added automatically
• 1[2-9]xx[2-9]xxxxxx |- allows dialing to any US/Canada Number with 11 digits
length
• 011[2-9]x. - allows international calls starting with 011
• [3469]11 - allow dialing special and emergency numbers 311, 411, 611 and 911
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Note: In some cases user wishes to dial strings such as *123 to activate voice mail or
other application provided by service provider. In this case * should be predefined
inside dial plan feature and the Dial Plan should be: { *x+ }.
Subscribe for MWI
Default is No. When set to “Yes” a SUBSCRIBE for Message Waiting Indication will be
sent periodically.
Send Anonymous
If this parameter is set to “Yes”, the “From” header along with Privacy and P_
Asserted_Identity headers in outgoing INVITE message will be set to anonymous,
blocking Caller ID.
Anonymous Call
Default is No. If set to Yes, incoming calls with anonymous Caller ID will be rejected
Rejection
with 486 Busy message.
Special Feature
Default is Standard. Choose the selection to meet some special requirements from
Softswitch vendors.
Session Expiration
Grandstream implemented SIP Session Timer. The session timer extension enables
SIP sessions to be periodically “refreshed” via a SIP request (UPDATE, or re-INVITE.
Once the session interval expires, if there is no refresh via a UPDATE or re-INVITE
message, the session will be terminated. Session Expiration is the time (in seconds) at
which the session is considered timed out, if no successful session refresh transaction
occurs beforehand. The default value is 180 seconds.
Min-SE
The minimum session expiration (in seconds). The default value is 90 seconds.
Caller Request Timer
If selecting “Yes” the phone will use session timer when it makes outbound calls if
remote party supports session timer.
Callee Request Timer
If selecting “Yes” the phone will use session timer when it receives inbound calls with
session timer request.
Force Timer
If selecting “Yes” the phone will use session timer even if the remote party does not
support this feature. Selecting “No” will allow the phone to enable session timer only
when the remote party support this feature.
To turn off Session Timer, select “No” for Caller Request Timer, Callee Request Timer,
and Force Timer.
UAC Specify Refresher
As a Caller, select UAC to use the phone as the refresher, or UAS to use the Callee or
proxy server as the refresher.
UAS Specify Refresher
As a Callee, select UAC to use caller or proxy server as the refresher, or UAS to use
the phone as the refresher.
Force INVITE
Session Timer can be refreshed using INVITE method or UPDATE method. Select
“Yes” to use INVITE method to refresh the session timer.
Send Re-INVITE After
Default is No, If set to “Yes”, device will send an INVITE with audio vocoders upon
Fax
completion of Fax to continue session in audio only.
Enable Silence
For fax machines that do not send a Disconnect when fax is done. This option
Detection for Fax
Enables/Disables the detection of silence in order to know the fax has finished. The
Disconnect
silence period is non-configurable and fixed to 7 seconds.
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Enable 100rel
Enables the use of PRACK (Provisional Acknowledgment) method.
Use First Matching
Default is No. If set to “Yes”, device will include only the first match vocoder in its
Vocoder in 200OK SDP
200OK response, otherwise it will include all match vocoders in same order received in
INVITE.
Preferred Vocoder
The HT502 supports up to 5 different Vocoder types including G.711 A-/U-law, G.726
(Supports bit rates 16, 24, 32 and 40), G.723.1, G.729A/B/E, iLBC and AAL2. The user
can configure Vocoders in a preference list that will be included with the same
preference order in SDP message.
appropriate option in “Choice 1”.
The first Vocoder is entered by choosing the
The last Vocoder is entered by choosing the
appropriate option in “Choice 8”.
Vocoder types can also be changed per call basis by using a star code. Please see the
“Call features” section.
Voice Frames per TX
Default is 2, from 1 -4 for G711/G726/G729
G723 Rate
Default is 6.3kbps. Defines the encoding rate for G.723 vocoder.
iLBC Frame Size
Sets the iLBC frame size in 20ms or 30ms
iLBC Payload type
Defines payload type for iLBC. Default value is 97. The valid range is between 96 and
127.
AAL2-G726-16 Payload
Default value is 100. Range is from 96 to 127.
type
AAL2-G726 - 24
Default value is 99. Range is from 96 to 127.
Payload type
AAL2-G726 - 32
Default value is 104. Range is from 96 to 127.
Payload type
AAL2-G726 - 40
Default value is 103. Range is from 96 to 127.
Payload type
G729E payload type
Default value is 102. Range is from 96 to 127.
VAD
Default is No. VAD allows detecting the absence of audio and conserve bandwidth by
preventing the transmission of "silent packets" over the network.
Symmetric RTP
Default is No. When set to Yes the device will change the destination to send RTP
packets to the source IP address and port of the inbound RTP packet last received by
the device.
Fax Mode
T.38 (Auto Detect) FoIP by default, or Pass-Through (must use codec PCMU/PCMA)
Fax Tone Detection
Default is Callee. This decides whether Caller, Callee or both sends out the re-INVITE
Mode
for T.38 or Fax Pass Through.
Jitter Buffer Type
Select either Fixed or Adaptive based on network conditions.
Jitter Buffer Length
Select Low, Medium or High based on network conditions.

High (initial 200ms, min 40ms, max 600ms) Note: not all vocoders can meet
the high requirement

FIRMWARE VERSION 1.0.9.1
Medium (initial 100ms, min 20ms, max 200ms)
HT502 USER MANUAL
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
SRTP Mode
Low (initial 50ms, min 10ms, max 100ms)
This option defines different implementation of support SRTP (squired RTP)
transmission mode.
SLIC Setting
Dependent on standard phone type (and location)
Caller ID Scheme
Bellcore/Telcordia, ETSI-FSK, ETSI-DTMF, SIN 227 – BT, & NTT Japan
Polarity Reversal
Default is No. If set to “Yes”, polarity will be reversed upon call establishment and
termination.
Loop Current
Default is No. Set it to Yes if the traditional PBX you are using with HT502 uses this
Disconnect
method for signaling call termination. Method initiates short voltage drop on the line
when remote (VoIP) side disconnects an active call.
Loop Current
Here can be configured duration of such voltage drop described in topic above.
Disconnect Duration
Enable Hook Flash
Default is Yes. If set to “No”, FLASH button could only be used for terminating calls.
Hook Flash Timing
Time period when the cradle is pressed (Hook Flash) to simulate FLASH. To prevent
unwanted activation of the Flash/Hold and automatic phone ring-back, adjust this time
value.
On Hook Timing
On-hook timing is the minimum time for an on-hook event to be validated.
Gain
Voice path volume adjustment.
•
Rx is a gain level for signals transmitted by FXS
•
Tx is a gain level for signals received by FXS.
Default = 0dB for both parameters. Loudest volume: +6dB Lowest volume: -6dB.
User can adjust volume of call on either end using the Rx Gain Level parameter and
the Tx Gain Level parameter located on the FXS Port Configuration page.
If call volume is too low when using the FXS port (ie. the ATA is at user site), adjust
volume using the Rx Gain Level parameter under the FXS Port Configuration page.
If voice volume is too low at the other end, user may increase the far end volume using
the Tx Gain Level parameter under the FXS Port Configuration page.
Disable Line Echo
Default is No. If set to “Yes” LEC will be disabled per call base. Recommended for
Canceller (LEC)
FAX/Data calls.
Ring Tones
This function lets you configure ring tone cadence preferences. User has 10 choices.
The configuration, completed in Distinctive Ring Tones block in the same page, applies
to ring tones cadences configured here.
SAVING THE CONFIGURATION CHANGES
Click the “Update” button in the Configuration page to save the changes to the HT502 configuration. The
FIRMWARE VERSION 1.0.9.1
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following screen confirms that the changes are saved. Reboot or power cycle the HT502 to make the
changes take effect.
REBOOTING THE HT502 FROM REMOTE
Press the “Reboot” button at the bottom of the configuration menu to reboot the ATA remotely. The web
browser will then display a message window to confirm that reboot is underway. Wait 30 seconds to log in
again.
CONFIGURATION THROUGH A CENTRAL SERVER
Grandstream HT502 can be automatically configured from a central provisioning system.
When HT502 boots up, it will send TFTP or HTTP/HTTPS requests to download configuration files,
“cfg000b82xxxxxx” and “cfg00082xxxxxx.xml”, where “000b82xxxxxx” is the LAN MAC address of the
HT502. If the download of “cfgxxxxxxxxxxxx.xml” is not successful, the provision program will issue
request a generic configuration file “cfg.xml”. Configuration file name should be in lower case letters.
The configuration data can be downloaded via TFTP or HTTP/HTTPS from the central server. A service
provider or an enterprise with large deployment of HT502 can easily manage the configuration and
service provisioning of individual devices remotely from a central server.
Grandstream provides a central provisioning system GAPS (Grandstream Automated Provisioning
System) to support automated configuration of Grandstream devices.
GAPS uses enhanced (NAT
friendly) TFTP or HTTP (thus no NAT issues) and other communication protocols to communicate with
each individual Grandstream device for firmware upgrade, remote reboot, etc.
Grandstream provides GAPS service to VoIP service providers. Use GAPS for either simple redirection
or with certain special provisioning settings.
At boot-up, Grandstream devices by default point to
Grandstream provisioning server GAPS, based on the unique MAC address of each device, GAPS
provision the devices with redirection settings so that they will be redirected to customer’s TFTP or
HTTP/HTTPS server for further provisioning.
Grandstream also provides configuration tools (Windows and Linux/Unix version) to facilitate the task of
generating device configuration files. The Grandstream configuration tools are free to end users. The
configuration
tools
and
configuration
templates
are
available
for
download
from
http://www.grandstream.com/support/tools .
FIRMWARE VERSION 1.0.9.1
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SOFTWARE UPGRADE
Software upgrade can be done via either TFTP or HTTP. The corresponding configuration settings are in
the ADVANCED SETTINGS configuration page.
FIRMWARE UPGRADE THROUGH TFTP/HTTP/HTTPS
To upgrade via TFTP or HTTP/HTTPS, the “Firmware Upgrade and Provisioning upgrade via” field needs
to be set to TFTP HTTP or HTTPS, respectively. “Firmware Server Path” needs to be set to a valid URL
of a TFTP or HTTP server, server name can be in either FQDN or IP address format. Here are examples
of some valid URL.
e.g. firmware.mycompany.com:6688/Grandstream/1.0.9.1
e.g. firmware.grandstream.com
NOTES:

Firmware upgrade server in IP address format can be configured via IVR. Please refer to the
CONFIGURATION GUIDE section for instructions. If the server is in FQDN format, it must be set
via the web configuration interface.

Grandstream recommends end-user use the Grandstream HTTP server. Its address can be found
at http://www.grandstream.com/support/firmware . Currently the HTTP firmware server URL is
firmware.grandstream.com. For large companies, we recommend to maintain their own TFTP/
HTTP/HTTPS server for upgrade and provisioning procedures.

Once a “Firmware Server Path” is set, user needs to update the settings and reboot the device. If
the configured firmware server is found and a new code image is available, the HT502 will
attempt to retrieve the new image files by downloading them into the HT502 ’s SRAM. During this
stage, the HT502’s LEDs will blink until the checking/downloading process is completed. Upon
verification of checksum, the new code image will then be saved into the Flash. If
TFTP/HTTP/HTTPS fails for any reason (e.g. TFTP/HTTP/HTTPS server is not responding, there
are no code image files available for upgrade, or checksum test fails, etc), the HT502 will stop the
TFTP/HTTP/HTTPS process and simply boot using the existing code image in the flash.

Firmware upgrade may take as long as 15 to 30 minutes over Internet, or just 5 minutes if it is
performed on a LAN.
It is recommended to conduct firmware upgrade in a controlled LAN
environment if possible. For users who do not have a local firmware upgrade server,
Grandstream provides a NAT-friendly TFTP server on the public Internet for firmware upgrade.
FIRMWARE VERSION 1.0.9.1
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
Grandstream’s latest firmware is available at http://www.grandstream.com/support/firmware .
Oversea users are strongly recommended to download the binary files and upgrade firmware
locally in a controlled LAN environment.

Alternatively, user can download a free TFTP or HTTP server and conduct local firmware upgrade.
A
free
windows
version
TFTP
server
is
available
for
download
from
http://support.solarwinds.net/updates/New-customerFree.cfm. Our latest official release can be
downloaded from http://www.grandstream.com/y-firmware.htm.
INSTRUCTIONS LOCAL FIRMWARE UPGRADE:
1. Unzip the file and put all of them under the root directory of the TFTP server.
2. Put the PC running the TFTP server and the HT502 device in the same LAN segment.
3. Please go to File -> Configure -> Security to change the TFTP server's default setting from
"Receive Only" to "Transmit Only" for the firmware upgrade.
4. Start the TFTP server, in the phone’s web configuration page
5. Configure the Firmware Server Path with the IP address of the PC
6. Update the change and reboot the unit
End users can also choose to download the free HTTP server from http://httpd.apache.org/ or use
Microsoft IIS web server.
CONFIGURATION FILE DOWNLOAD
Grandstream SIP Device can be configured via Web Interface as well as via Configuration File through
TFTP or HTTP/HTTPS. “Config Server Path” is the TFTP or HTTP/HTTPS server path for configuration
file. It needs to be set to a valid URL, either in FQDN or IP address format. The “Config Server Path” can
be same or different from the “Firmware Server Path”.
A configuration parameter is associated with each particular field in the web configuration page.
A
parameter consists of a Capital letter P and 2 to 3 (Could be extended to 4 in the future) digit numeric
numbers. i.e., P2 is associated with “Admin Password” in the ADVANCED SETTINGS page. For a
detailed parameter list, please refer to the corresponding firmware release configuration template.
When a Grandstream device boots up or reboots, it will issue a request for a configuration file
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“cfgxxxxxxxxxxxx”, where “xxxxxxxxxxxx” is the MAC address of the device, i.e., “cfg000b820102ab”. In
addition, device will also requests a XML configuration file “cfgxxxxxxxxxxxx.xml”. If the download of
“cfgxxxxxxxxxxxx.xml” is not successful, the provision program will issue a request for a generic
configuration file “cfg.xml”. Configuration file name should be in lower case letters.
For more details on Grandstream Device provisioning, please refer to:
http://www.grandstream.com/general/gs_provisioning_guide_public.pdf
FIRMWARE AND CONFIGURATION FILE PREFIX AND POSTFIX
Firmware Prefix and Postfix allows device to download the firmware name with the matching Prefix and
Postfix. This makes it the possible to store ALL of the firmware with different version in one single
directory. Similarly, Config File Prefix and Postfix allows device to download the configuration file with the
matching Prefix and Postfix. Thus multiple configuration files for the same device can be stored in one
directory.
In addition, when the field “Check New Firmware only when F/W pre/suffix changes” is set to “Yes”, the
device will only issue firmware upgrade request if there are changes in the firmware Prefix or Postfix.
MANAGING FIRMWARE AND CONFIGURATION FILE DOWNLOAD
When “Automatic Upgrade” is set “Yes, every” the auto check will be done in the minute specified in this
field. If set to “daily at hour (0-23)”, Service Provider can use P193 (Auto Check Interval) to have the
devices do a daily check at the hour set in this field with either Firmware Server or Config Server. If set to
“weekly on day (0-6)” the auto check will be done in the day specified in this field. This allows the device
periodically check if there are any new changes need to be taken on a scheduled time. By defining
different intervals in P193 for different devices, Server Provider can spread the Firmware or Configuration
File download in minutes to reduce the Firmware or Provisioning Server load at any given time.
Automatic Upgrade:
No
Yes, every
Yes, daily at hour
FIRMWARE VERSION 1.0.9.1
1
10080
(0-23).
minutes(60-5256000).
Yes, weekly on day
HT502 USER MANUAL
1
(0-6).
Page 46 of 48
RESTORE FACTORY DEFAULT SETTING
WARNING! Restoring the Factory Default Setting will DELETE all configuration information of the phone.
Please BACKUP or PRINT out all the settings before you approach to following steps. Grandstream will
not take any responsibility if you lose all the parameters of setting and cannot connect to your VoIP
service provider.
FACTORY RESET
There are two (2) methods for resetting your unit:
RESET BUTTON
Reset default factory settings following these four (4) steps:
1. Unplug the Ethernet cable.
2. Locate a needle-sized hole on the back panel of the gateway unit next to the power
connection.
3. Insert a pin in this hole, and press for about 7 seconds.
4. Take out the pin. All unit settings are restored to factory settings.
IVR COMMAND
Reset default factory settings using the IVR Prompt (Table 5):
1. Dial “***” for voice prompt.
2. Enter “99” and wait for “reset” voice prompt.
3. Enter the encoded MAC address (Look below on how to encode MAC address).
4. Wait 15 seconds and device will automatically reboot and restore factory settings.
Encode the MAC Address
1. Locate the MAC address of the device. It is the 12 digit HEX number on the bottom of the
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unit.
2. Key in the MAC address. Use the following mapping:
0-9: 0-9
A:
22 (press the “2” key twice, “A” will show on the LCD)
B:
222
C:
2222
D:
33 (press the “3” key twice, “D” will show on the LCD)
E:
333
F:
3333
For example: if the MAC address is 000b8200e395, it should be keyed in as “0002228200333395”.
NOTE:
1. Factory Reset will be disabled if the “Lock keypad update” is set to “Yes”.
2. Please be aware by default the HT502 WAN side HTTP access is disabled. After a factory reset, the
device’s web configuration page can be accessed only from its LAN port.
3. If the HT502 was previously locked by your local service provider, pressing the RESET button will
only restart the unit. The device will not return to factory default settings.
FIRMWARE VERSION 1.0.9.1
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