i-Series Extender 4000

i-Series Extender 4000
Quick Installation Guide
July, 2001
G-4000P-RKM Rev AA
Table of Contents
Purpose of this Document ................................................................................................................ 3
Safety Considerations....................................................................................................................... 3
Support Telephone Number.............................................................................................................. 3
Introduction...................................................................................................................................... 4
Specifications ................................................................................................................................... 5
Regulatory Approvals ................................................................................................................................. 5
System Architecture .................................................................................................................................... 5
Memory ....................................................................................................................................................... 5
Ethernet Port ................................................................................................................................................ 5
Interfaces ..................................................................................................................................................... 5
Voice ........................................................................................................................................................... 5
Protocols and Services ................................................................................................................................ 5
Electrical ...................................................................................................................................................... 5
Environmental ............................................................................................................................................. 5
Prerequisites for Installation ........................................................................................................... 6
Networking .................................................................................................................................................. 6
TCP/UDP .................................................................................................................................................... 6
Remote Location ...................................................................................................................................... 6
Gateway Location .................................................................................................................................... 6
Power and Wiring ........................................................................................................................................ 6
Installation Components .................................................................................................................. 7
Parts not provided with the i-Series Extender 4000 ....................................................................... 7
Typical Installation .......................................................................................................................... 7
Location............................................................................................................................................ 8
Compatible Telephones.................................................................................................................... 8
Connections...................................................................................................................................... 9
Power-Up ....................................................................................................................................... 10
Configuration using the Telephone-set Interface........................................................................... 11
The Menu Structure ................................................................................................................................... 13
User ID Menu ........................................................................................................................................ 15
IP Menu ................................................................................................................................................. 16
Admin Password Menu .......................................................................................................................... 17
Saving Configuration Changes .............................................................................................................. 18
Configuration using the Management Interface (MI).................................................................... 19
IP Call-Suspend Setup.................................................................................................................... 19
Placing a Call ................................................................................................................................ 21
Optional Configuration.................................................................................................................. 22
Remote Telephone Messages.......................................................................................................... 23
i-Series Extender 4000 Quick Installation Guide
Page 1
Figures
Figure 1. Typical Installation ...........................................................................................................7
Figure 2. Back of the i-Series Extender 4000 ..................................................................................9
Figure 3. Front Panel ......................................................................................................................10
Figure 4. Menu Legend ..................................................................................................................12
Figure 5. IP Call Suspend Settings .................................................................................................20
i-Series Extender 4000 Quick Installation Guide
Page 2
Purpose of this Document
This document provides instructions to install, configure, and troubleshoot the i-Series Extender 4000 single
client device.
Safety Considerations
!
IMPORTANT SAFETY INSTRUCTIONS
•
Do not install this product near water.
Example: In a wet basement location.
•
Do not overload wall outlets, as this can result in the risk of fire or electrical shock.
•
Do not attach the power supply cord to building surfaces. Do not allow anything to rest on the power
cord. Do not place this product where anyone can step on the cord.
•
Do not operate the system if chemical gas leakage is suspected in the area. Use a telephone located in
another, safe area to report the trouble.
Support Telephone Number
Call your authorized NEC America, Inc. dealer, if you need assistance when installing, programming, or
using this equipment.
i-Series Extender 4000 Quick Installation Guide
Page 3
Introduction
The i-Series Extender 4000 provides remote voice access to a corporate PBX for a single remote user.
Remote users can connect to an i-Series Gateway via a 10Base-T Ethernet connection using IP packet transmission. The remote users’ telephones connect to the i-Series Extender 4000 via an RJ-11 telephone jack.
Their telephone traffic is placed in IP packets and sent out to the LAN via a 10Base-T Ethernet connection to
the i-Series Gateway.
The i-Series Extender 4000 provides a choice of three voice compression algorithms: G711, G729A, and
G726 (24 and 32 Kbps ADPCM options) to reduce bandwidth requirements. The i-Series Extender 4000
extends the full functionality of the PBX to a remote location, via IP over a LAN.
All voice traffic and signaling information from the digital telephone system is packetized by Remote Voice
Protocol (RVP). These packets are encapsulated into IP packets and sent out over Ethernet. The voice
packets can share the Ethernet network with other common data devices. The remote user can also connect a
PC to the LAN through an RJ-45 Ethernet jack on the i-Series Extender 4000, which acts as a hub.
The voice and signaling traffic is transmitted over the LAN between the i-Series Extender 4000 at the
remote location and the i-Series Gateway at the central location. At the Gateway, the packets are converted
back into the PBX system protocol and sent to the PBX via an RJ-21 cable.
IP-based products from NEC America, Inc. utilize Voice over IP (VoIP) technology to deliver remote
voice solutions. The voice quality of these solutions depends on variables such as available bandwidth,
network latency, and Quality of Service (QoS) initiatives, all of which are controlled by the network and
internet service providers. Because these variables are not in NEC America, Inc. control, we can not
guarantee the performance of the user’s IP-based remote voice solution.
i-Series Extender 4000 Quick Installation Guide
Page 4
Specifications
Regulatory Approvals
FCC
Parts 15 & 68, Subpart B, Class B
NRTL/C
CSA Standard C22.2 No.0-M91, 225-M90
Industry Canada
CS-03
UL Standard
950
System Architecture
CPU
Motorola 68EN302, 20MHz
DSP
Analog Devices 2187, 52 MIPS
Memory
DRAM
2MB
Flash Memory
2MB
Boot ROM
512KB
Ethernet Port
Protocol
RJ-45, Ethernet (used for RVP over IP)
Interface
10Base-T
IP Addressing
DHCP and static
Interfaces
Telephone
RJ-11
Voice
Voice compression
G.729a, G.711, G.726 (ADPCM 32 and ADPCM 24)
Protocols and Services
LAN
RVP over Internet Protocol (IP)
Electrical
Line Voltage
120V AC Adapter
Environmental
Temperature
32° - 130°F (0° - 55°C)
Relative Humidity
5 to 95%
i-Series Extender 4000 Quick Installation Guide
Page 5
Prerequisites for Installation
You must meet the following requirements before installing the i-Series Extender 4000:
Networking
•
An appropriate network terminating device must be installed and functioning at both the corporate facility and the branch office.
•
The data connection between the corporate facility and the i-Series Extender 4000 MUST be operational and configured properly.
•
The network termination equipment must support a 10Base-T Ethernet interface.
TCP/UDP
Ensure that the correct TCP/UDP ports are opened to allow the i-Series Extender 4000 to connect to the
i-Series Gateway through your company firewall. The following TCP/UDP port requirements must be met:
Remote Location
The i-Series Extender 4000 uses port 12,288 for incoming UDP streams and any port between 1024 and
65535 for outgoing TCP streams.
Gateway Location
The Gateway unit uses TCP/UDP port 2698.
Power and Wiring
The system is designed to operate at 120 VAC. Do not apply power to the i-Series Extender 4000 until you
are instructed to do so in the installation procedure.
•
Install the i-Series Extender 4000 power supply and cabling away from high power/high RF noise
devices such as computers, fans, fluorescent ballast, and power supplies.
•
Use good wiring practices. Do not run wires over fluorescent lights, computers, air conditioners, etc. as
this can introduce noise.
•
The distance between the telephones and the i-Series Extender 4000 should NOT exceed 500 feet.
i-Series Extender 4000 Quick Installation Guide
Page 6
Installation Components
Quantity
Description
Provided
1
i-Series Extender 4000 Quick Installation
Guide
Yes
1
i-Series Extender 4000 unit
Yes
1
12VDC Power Supply
Yes
1
CAT 5 Ethernet cable
Yes
Table 1. Part Descriptions
Parts not provided with the i-Series Extender 4000
•
Digital telephones and cabling
•
Routers - Use routers if you want to access to the Remote/Gateway system from outside the local network.
See page 8 for a list of compatible telephones.
Note: Use two-wire digital display telephones only.
Typical Installation
Figure 1 shows a typical installation of the i-Series Extender 4000.
Ethernet
Ethernet
IP Network
Router
Router
i-Series Extender 4000
LAN
RJ-11
i-Series Gateway
RJ-21
Digital Telephone
PBX/KTS
Remote Branch Office
Corporate Facility
Figure 1. Typical Installation
i-Series Extender 4000 Quick Installation Guide
Page 7
Location
You can place the i-Series Extender 4000 on any desktop, within 6 feet of an electrical outlet. Follow the
“Safety Considerations” on page 3.
Compatible Telephones
•
DSS 4450 (add on module for 4424LD+ and 4424D+)
NEC America uses i-Series telephones by Nitsuko.
•
92550 - Digital Single Line
•
92753 - 12 Line, 22 Button, with Display
•
92750 - 12 Line, 22 Button, no Display
•
92783 - 24 Line, 34 Button, with Display
•
92760 - 18 Line, 28 Button, no Display
•
92763 - 18 Line, 28 Button, with Display
•
92773 - 24 Line, 34 Button, Super Display
i-Series Extender 4000 Quick Installation Guide
Page 8
Connections
The i-Series Extender 4000 requires connections A through D as shown in Figure 2.
A
B
C
D
Figure 2. Back of the i-Series Extender 4000
Letter
Label
Cable Type
Connects to
A
PHONE
Cat 3 with RJ-11
connectors
one i-Series digital telephone
B
PC
Cat 3/5/6 with a
RJ-45 connectors
NIC card on the PC *
C
LAN
Cat 3/5/6 with a
RJ-45 connectors
a Hub/Repeater or Switch on Local Area Network
(LAN) **
D
+12VDC
Power Supply
a 12 VDC power supply (comes with the unit)
Table 2. Connections
Notes:
* The PC port is a hub style Ethernet port and should connect only to an Ethernet station.
** The LAN port is a station-side Ethernet port and should connect only to an Ethernet hub. It operates only
on 10 megabit Ethernet networks. It does not support 100 megabits.
i-Series Extender 4000 Quick Installation Guide
Page 9
Power-Up
1.
Once the i-Series Extender 4000 is properly connected and powered it performs a series of self-diagnostic tests that are displayed as a series of LED flashes. The “Status” LED blinks for several seconds as
the module initializes.
2.
Once the power-up sequence has finished, the state of the LEDs should be:
Figure 3. Front Panel
Label
Description
Status
Blinking while module is initializing.
Off when not powered.
After unit is powered:
On Solid Green when enabled but not extended.
Slow Green Flash when extended and on-hook.
Fast Green Flash when extended and off hook.
Green Flicker when there is no connection to a telephone.
CLN
Blinking when an Ethernet collision condition exists.
PC
Normally off, blinks when traffic is sent.
LAN
Normally off, blinks when traffic is sent.
EXT
Normally off, blinks when the i-Series 4000 Extender
sends Ethernet traffic.
Table 3. LED States
i-Series Extender 4000 Quick Installation Guide
Page 10
Configuration using the Telephone-set Interface
Introduction
You can use the telephone-set interface for setting configuration parameters for the
i-Series Extender 4000 from a two-wire digital telephone.
Note: Before you begin, ensure the i-Series Extender 4000 is connected and powered
up, as described on the previous pages.
Required
settings
You must set the following parameters before placing calls with the i-Series Extender
4000.
Note: The following numbers or addresses are network related; you must enter them
correctly. They are not random numbers, therefore the network administrator must
assign them before you attempt to configure or place calls through the Remote module.
Use the terms listed here when requesting this required information.
Set the User ID – The UserID identifies the specific port assigned to the telephone or
user connected to the Remote module. This User ID must match the User ID assigned
to the port on the i-Series Gateway. See the i-Series Gateway System Administrator’s
Guide for instructions on setting parameters in the i-Series Gateway Management Interface (MI).
Set the Gateway IP Address – The Gateway IP Address identifies the Switch Module
(i-Series Gateway) at the corporate facility that is responsible for handling the voice
traffic for the i-Series Extender 4000.
Set the Address Mode - This mode determines whether the IP address is static or is to
be obtained from a Dynamic Host Configuration Protocol (DHCP) server.
Set the IP Address - This is the IP address of the i-Series Extender 4000 unit. All
devices must have a unique IP address, if not using DHCP address mode.
Set the IP Subnet Mask – The subnet mask indicates the network class (A, B, or C). If
you use subnetting, you must set this mask appropriately (usually, 255.255.255.0).
Set the Default Router – This is the address of a device on the LAN that forwards IP
traffic to and from other network segments.
Note: Once you enter an IP address and reboot the i-Series Extender 4000, you can
manage the i-Series Extender 4000 completely via Telnet or Remote Log in.
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How to access the
telephone-set interface
If a connection is already established and the telephone is operational, press the
Hold key four times and press ‘2’ to disconnect. Press the hold key an additional four times to start the telephone-set interface. (See the flowchart on page
14.) The message “Press ‘1’ to Connect” appears in the display.
Menu Legend
Navigate through the telephone-set interface using the dialpad on the telephone.
The menu legend shows each applicable dial key and the its corresponding
screen or command within the interface. (See Figure 4, below.)
IMPORTANT NOTE:
If a function key is not for 30 seconds, the module automatically returns to the
first display, “Press ‘1’ to Connect”.
1: (Prv) Press to move backward through the menus. (Moves left or up in
chart.)
2: (Ok) Press to select the displayed option AND means Ok. (Moves right in
chart.)
3: (Nxt) Press to move forward through the menus. In the Address Mode submenu, use this key to scroll down the list of available address modes.
(Moves down in chart.)
No: Press to quit the current menu and return to the previous menu without making a change. (Some screens use this feature for enabling or disabling an
option.)
LND: Press to accept user input (example, an IP address).
Hold: Press to cancel user input.
#: Press to delete a value (one character).
*: Use to represent a period (.) when entering certain values, for example, an IP
address.
The figure below shows how to navigate through the telephone-set interface
using the dial keys. Refer to this figure to use the following flowcharts.
1: Prv
1: Prv
2: Ok
3: Nxt
Figure 4. Menu Legend
i-Series Extender 4000 Quick Installation Guide
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The Menu Structure
The following pages detail the menu structure for the telephone-set interface in a flowchart manner. Use the
legend on page 12 to navigate through the menus and access the required parameters.
Note: The parameters that you must enter are
i-Series Extender 4000 Quick Installation Guide
shadowed
for easy identification in this flowchart.
Page 13
2: Ok
3: Nxt
1: Prv/No
“Press ‘1’ to Connect”
Exit Admin Menu
1: Prv/No
2: Ok
3: Nxt
1: Prv 2: Ok
IP Address
3: Nxt
Pinging..............
Ping Gateway
1: Prv 2: Ok 3: Nxt
1: Prv 2: Ok
IP Menu
Set Config
1: Prv 2: Ok 3: Nxt
View IP Info
The following info
is listed:
3: Nxt
1: Prv 2: Ok
Go to page 16
3: Nxt
Connect Menu
DHCP- Enable/Disable
(shown if DHCP is
enabled)
IP Menu
User Id
Go to page 15
1: Prv 2: Ok
Go to page 17
IP Address
Admin Password
Subnet Mask
Default Route
DNS Server
(shown if DHCP is
enabled)
1: Prv 2: Ok 3: Nxt
DNS Domain
(shown if DHCP is
enabled)
Ping IP Host
Enter IP Address
‘LND’ to Accept
use * for.
‘Hold’ to Cancel
‘#’ to Delete
0.0.0.0
1: Prv 2: Ok 3: Nxt
View System Info
1: Prv 2: Ok
Restart Unit
The following info is listed:
System Name
Serial Number
PBX Type
Time since (last) boot
IP Address
MAC Address
Runtime Ver.
PLD Ver.
Signal DSP Ver.
Voice DSP Ver.
i-Series Extender 4000 Quick Installation Guide
Flash Ver.
ROM Ver.
Hardware Ver.
Hardware Type
Serial Ports
Phone Ports
DRAM (bytes)
Heap (bytes)
Flash (bytes)
Page 14
User ID Menu
1: Prv/No
1: Prv/No
2: Ok
3: Nxt
Enter User ID using the telephone keypad.
To/From page 14
Commands:
1: Prv 2: Ok
‘LND’ to Accept
‘Hold’ to Cancel
3: Nxt
User ID
Enter the password to restrict Switch
module (i-Series Gateway) access using
the telephone keypad.
1: Prv 2: Ok
3: Nxt
‘LND’ to Accept
‘Hold’ to Cancel
‘#’ to Delete
Password
1: Prv 2: Ok
Commands:
3: Nxt
Gateway Address
Enter the Gateway IP Address using the
telephone keypad.
Commands:
‘LND’ to Accept
‘Hold’ to Cancel
‘#’ to Delete
1: Prv 2: Ok
Auto Connect
i-Series Extender 4000 Quick Installation Guide
2: Ok
3: No
Enable/Disable AutoCon?
Page 15
IP Menu
1: Prv/No
To/From page 14
1: Prv/No
2: Ok
3: Nxt
1: Prv 2: Ok
3: Nxt
1: Prv 2: Ok
IP Menu
1: Prv 2: Ok
3: Nxt
3: Nxt
Mode: Static
DHCP
Address Mode
Prv scrolls up
Next scrolls down
To/From page 14
If Mode is Static
Mode is DHCP
1: Prv 2: Ok
3: Nxt
Address
0.0.0.0
1: Prv 2: Ok
3: Nxt
Subnet Mask
1: Prv 2: Ok
Commands:
‘LND’ to Accept
use * for .
‘Hold’ to Cancel
‘#’ to Delete
3: Nxt
Default Router
1: Prv 2: Ok
3: Nxt
2: Ok 3: No
Telnet
Enable/Disable Telnet?
1: Prv 2: Ok
2: Ok 3: No
FTP
Enable/Disable FTP?
i-Series Extender 4000 Quick Installation Guide
Page 16
Admin Password Menu
1: Prv/No
1: Prv/No
2: Ok
3: Nxt
To/From page 14
1: Prv 2: Ok
Admin Password
Enter Admin Password
Enter New Password
Enter Password again
Success
i-Series Extender 4000 Quick Installation Guide
Page 17
Saving Configuration Changes
After you change a parameter value using the telephone-set interface, follow these steps to save your changes:
1.
Press the Prv key (1) to navigate backward through the menus until you see the prompt “Save Changes?”.
2.
Press the OK key (2). The display on the telephone indicates that the configuration is being saved. When the configuration is saved, you see the prompt “OK to Restart?”.
3.
Press the OK (2) key to restart the remote module.
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Configuration using the Management Interface (MI)
Once the IP address is configured for the i-Series Extender 4000, you can use Telnet over the existing LAN
connection to access the MI. This connection enables you to access the MI. The MI enables you to fully
manage the i-Series Extender 4000 from your PC.
Note: If a LAN is not readily available at the time of configuration, you can Telnet into the i-Series 4000
Extender if the PC is directly connected into the Extender PC port.
Alternatively, you can use the remote login feature of the i-Series Gateway. For detailed instructions on
starting the MI, refer to the Configuration chapter of the System Administrator’s Guide.
IP Call-Suspend Setup
Use the MI to configure the Call Suspend feature. The Call Suspend feature allows the telecom manager to
reduce network costs by suspending the transmission of IP packets when all telephones are inactive for a
configurable period of time. When the line is disconnected the telephone displays indicate that they are in
the Call Suspend mode. When a user goes off-hook or an incoming call occurs, IP packets are again transmitted, and all telephones are taken out of Call Suspend mode.
The Call Suspend feature assumes that if the IP connection is down, it is possible to receive busy signals
from the network preventing communication. This causes an interruption of telephone service to the branch
office. This assumption leads to setting the Call Suspend timer to a value that ensures that IP packets are
transmitted during normal business hours.
The expected usage pattern for the IP connection is that at the beginning of the business day, the telephones
are brought out of Call Suspend mode transmitting IP packets when the first user either goes off-hook or an
incoming call arrives. Packets are transmitted for the remainder of the business day because all telephones
are not idle longer than the Call Suspend timeout value. At the end of the day, all telephones become inactive
for the Call Suspend timeout value and no more IP packets are sent. If anyone works late or comes in early,
normal usage causes the IP packets to be transmitted.
Procedure
1.
Access the Call_Suspend Menu using the following path;
Path: Remote->Configuration->Connect->Call_Suspend
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Page 19
2.
The following menu appears. Press the → key to access the parameters.
======================================
*Enabled
No
Timeout
[30]
Remote Only Wakeup
Yes
Remote Login Timeout
[300]
======================================
Enable Call Suspend when extended
ports are inactive
<F1> or <Ctrl-A> for help
--------------------------------------
Figure 5. IP Call Suspend Settings
3.
Press the → key to the Enabled parameter. Press the → key to select Yes.
4.
Press the ↓ and → key to the Timeout parameter. This parameter causes the units to go into Call Suspend mode when no activity occurs for the set Timeout value.
Note: Set the value between 30 and 240 minutes.
5.
Press the ↓ and → key to the Remote Only Wakeup parameter. Setting this parameter to Yes enables
wakeup from Call Suspend on activity (for example, when a telephone set goes off-hook or a key is
pressed) at the Branch site only. If this parameter is set to No (disabled), incoming calls can also cause
wakeup from Call Suspend.
6.
Press the ↓ and → key to the Remote Login Timeout parameter. This parameter sets the timeout value
for a connection from the Gateway to Remote or Remote to Gateway.
7.
Press the ← key to accept changes and go back to the Configuration Menu.
8.
Press the ↓ key to the Save parameter. Press Enter to save changes to the active config (.rmt) file.
i-Series Extender 4000 Quick Installation Guide
Page 20
Placing a Call
Once the i-Series Extender 4000 is installed and powered-up, the remote telephones can go on-line. Follow
the procedure below to place a call.
Procedure
At the remote location, the telephones should display the following message if Autoconnect is disabled:
Press ‘1’ to connect
1.
Press 1 on the keypad to connect the telephone to the corporate.
2.
Place a test call and check for clear reception.
Note: If the connection is “noisy” or nonexistent, refer to the i-Series Gateway System Administrator’s
Guide for troubleshooting steps.
i-Series Extender 4000 Quick Installation Guide
Page 21
Optional Configuration
The i-Series Extender 4000 MI has optional configuration parameters that provide the following capabilities:
1.
Auto-Connect – This is a Remote module option, which automatically connects remote users (telephones) when the i-Series Extender 4000 is rebooted or brought on-line. (Eliminates the need to press
“1” on the remote telephone.) Enable this feature for non-display telephones since you cannot see the
“Press ‘1’ to Connect” message.
2.
Admin Password – If configured, this option restricts access to the i-Series Extender 4000 MI, by
requiring a password for entry. You must enter the Admin Password before you can change any configuration parameters.
Note: The i-Series Extender 4000 units and the i-Series Gateway units have their own separate Admin
passwords.
3.
Password – This option provides a secure link between the i-Series Gateway and the i-Series Extender
4000. If this option is configured, a password is assigned to both the i-Series Extender 4000 and the
i-Series Gateway. This password is necessary to connect to the i-Series Gateway. The password on the
i-Series Extender 4000 must match the password assigned to the port on the i-Series Gateway.
Note: Refer to the i-Series Gateway System Administrator’s Guide for more information on configuring
these options.
i-Series Extender 4000 Quick Installation Guide
Page 22
Remote Telephone Messages
Introduction
The following messages appear on the remote telephone display connected to the
Remote unit when a connection attempt fails. The telephone display indicates ‘Connect
Error,’ followed by a message. Table 4 contains the possible Connect Error messages.
Message
Assigned port
Busy
(see note)
Description
Action
The switch port is being
used by another user.
Wait until port is available or reset port on the
i-Series Gateway and try to re-connect.
Assigned port
Down
(see note)
The switch port is not
available, due to problems (green flicker) with
the port.
Check port connection at the i-Series Gateway.
Carrier Lost
(see note)
Displayed if the network connection to the
PBX is lost.
•
Check network links.
•
•
Attempt to reconnect after network is up and
running.
Make sure the Connect Password is correct.
•
Check network links.
•
Attempt to reconnect.
Connect rejected The PBX rejects the
connection request.
Connect Timeout
The Extender cannot
connect to the i-Series
Gateway.
Network disabled The network device is
not connected, being
used, or is not active.
Network down
The network device has
a problem.
No bandwidth
The unit bandwidth is
oversubscribed. No network bandwidth is available from telephone
signaling.
Normal take down Displayed when the network device is either
being rebooted or reset.
No Voice path
The unit bandwidth is
(see note)
oversubscribed. No network bandwidth for
voice.
Peer disconnect Displayed when the
Switch unit has disconnected from the network
device.
Check WAN connection on the i-Series Gateway
unit.
Check network link and device.
Check network link and device.
Change voice compression.
Wait until the WAN link LED is solid green, then
attempt to re-connect.
Change voice compression.
Check the voice compression or network at the
i-Series Gateway.
Table 4. Connect Error Messages
Note: This message is not preceded by “Connect error”.
i-Series Extender 4000 Quick Installation Guide
Page 23
NEC America, Inc., Corporate Networks Group
4 Forest Parkway, Shelton, CT 06484
Tel: 800-365-1928 Fax: 203-926-5458
cng.nec.com
Other Important Telephone Numbers
Sales:
203-926-5450
Customer Service:
203-926-5444
Customer Service FAX:
203-926-5454
Technical Service:
203-925-8801
Discontinued Product Service:
900-990-2541
Technical Training:
203-926-5430
Emergency Technical Service (After Hours) 203-929-7920
(Excludes discontinued products)
i-Series Extender 4000 Quick Installation Guide
Page 24
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