advertisement
DSP 9612 Flash Poll Modem
User’s Guide
Complements of ARC Electronics
800-926-0226 [email protected]
www.arcelect.com
0049 −0117−100 Rev. A
Contents
CHAPTER 1 INTRODUCTION........................................................ 5
F EATURES .............................................................................................. 6
A PPLICATIONS ........................................................................................ 7
CHAPTER 2 INSTALLATION ......................................................... 9
U NPACKING Y OUR H ARDWARE .............................................................. 9
A DDITIONAL I TEMS Y OU N EED .............................................................. 9
H ARDWARE O VERVIEW ........................................................................ 10
Back View ........................................................................................ 10
Front View ....................................................................................... 11
I NSTALLATION S UMMARY .................................................................... 12
F INDING A S UITABLE L OCATION .......................................................... 12
C ONFIGURING THE M ODEM .................................................................. 13
SW1 DIP Switch Settings................................................................. 14
SW2 DIP Switch Settings................................................................. 17
SW3 DIP Switch Settings................................................................. 21
C ONNECTING TO A T RANSMISSION L INE ............................................... 26
C ONNECTING TO A V OLTAGE S OURCE .................................................. 27
C ONNECTING AN RS-232 D EVICE ........................................................ 28
LED S ................................................................................................... 29
L OOPBACK C ONTROL S WITCH .............................................................. 30
APPENDIX A TROUBLESHOOTING .......................................... 31
P ROBLEM S OLVING .............................................................................. 31
APPENDIX B DIP SWITCH SUMMARY ..................................... 33
APPENDIX C SPECIFICATIONS.................................................. 35
G ENERAL S PECIFICATIONS ................................................................... 35
M ECHANICAL S PECIFICATIONS ............................................................. 36
I NTERFACE C ONNECTOR P IN A SSIGNMENTS ......................................... 37
RS-232 (DTE) Interface................................................................... 38
E NVIRONMENTAL S PECIFICATIONS ....................................................... 38
C OMPLIANCES ...................................................................................... 39
APPENDIX D COMPLIANCES...................................................... 41
APPENDIX E LIMITED PRODUCT WARRANTY .................... 43
APPENDIX F RMA PROCEDURE ................................................ 44
Page iii
Contents
N OTES
Page iv
Chapter 1
Introduction
C ongratulations for purchasing the finest industrial-grade fastpoll modem available.
The Telenetics DSP9612 (Flash Poll) modem is a 9600/4800/0-
1800 bps modem designed for 4-wire, full-duplex or 2-wire, halfduplex operation over a voice-band leased line or private line. The modem is designed utilizing the latest digital-signal processing (DSP) technology to achieve high performance. The modem employs
Telenetics’ proprietary modulation and encoding scheme to achieve fast modem training time. The modem is also backward compatible with Bell 202 and ITU-T V.23 modems.
The DSP9612 modem is ideally suited for multi-point communication systems that require fast response time, short training time, and low throughput delay. The DSP9612 is the most technologically advanced modem on the market.
This User’s Guide describes both the DSP9612FP (AC-powered) modem and the DSP9612-LV (DC-powered) modem. This manual is intended to let you get your modem “up and running” as quickly as possible. It contains all the information you need to configure and install your modem. It also contains troubleshooting information in the unlikely event you encounter a problem with your modem.
Page 5
Introduction
Features
The DSP9612 modem is specifically designed for harsh environments found in utility substations and industrial facilities. Though functionally similar to commercial modems, the DSP9612 provides the following unique features that make it well suited for utility and industrial applications.
Packaged in a rugged, compact enclosure for industrial applications.
Leased-line interface protected with heavy-duty surge protection hardware (15KV).
Requires no human intervention, making it ideal for unmanned locations.
Works within an extended temperature range of -40ºC to +85ºC.
Designed with coupling transformers for high-voltage isolation and common mode noise rejection in industrial and commercial environments.
Operate over voice-band conditioned or unconditioned leased line and pilot wires.
Accepts power from a wide range of AC and DC power supplies.
− DSP9612FP: 85 to 265 VAC or 85 to 400 VDC
− DSP9612-LV: 10 to 53 VDC
Standard industrial connectors for data, analog, and power interfaces allow reliable interconnection to other industrial equipment.
Asynchronous data rates (selectable) of 9600, 4800, and 0-1800 bps.
Easily accessible DIP switches for user configuration and option selection.
DB25 connector for RS-232/V.24 interface.
Local analog, local digital, and remote digital loopback diagnostics.
Page 6
Applications
Applications
The DSP9612 modem is designed for point-to-point and multipoint data communications. Figure 1-1 shows a typical multipoint configuration.
Figure 1-1. Network of Multipoint Configuration
There are a number of factors that can affect the network’s and modem’s operation and performance. These include:
Operating speed
2-wire or 4-wire configuration
Transmission line characteristics, noise, and line impairments
Network configuration (point-to-point or multipoint)
Number of nodes on the network
Page 7
Introduction
N OTES
Page 8
Chapter 2
Installation
T his chapter describes how to install the modem.
Unpacking Your Hardware
Your package should include:
At least one of the following DSP9612 modems:
− Model DSP9612FP for 85 to 265 VAC
− Model DSP9612-LV for 10 to 53 VDC
A leased-line cable
A shielded DC power cable (model DSP9612-LV modem only)
This User’s Guide
If your package contents are damaged or missing, please contact your place of purchase immediately.
Additional Items You Need
To use your modem, you need the following additional items:
Two- or four-wire transmission line or leased line
A DB25-F data cable for your Data Terminal Equipment (DTE) port
Page 9
Installation
A power supply that provides either:
− 85 to 265 Volts AC, 50 to 60 Hz, single phase or 85 to
400 VDC (if you have the model DSP9612FP modem), or
− 10 to 53 Volts DC (if you have the model DSP9612-LV modem)
Hardware Overview
Back View
Figures 2-1 and 2-2 show the back view of the two DSP9612 modem models. Starting from the left side, these views show:
A 4-wire/2-wire configuration block. See page 26.
A female, 25-pin RS-232 connector, for connecting a standard
DTE (RTU). See page 28.
A POWER ON/OFF switch.
A power connector. See page 27.
Figure 2-1. Back View of Model DSP9612FP Modem
Page 10
Hardware Overview
Figure 2-2. Back View of Model DSP9612-LV Modem
Front View
The Model DSP9612FP and Model 9612-LV modems have identical front panels. Figure 2-3 shows the front view of the modem. Starting from the left side, this view shows:
A set of nine LEDs. See page 29.
A loopback test switch. See page 30.
Figure 2-3. Front View of Modem
Page 11
Installation
Installation Summary
The modem installation involves the following steps:
1. Finding a suitable location for the modem. See the section below.
2. Configuring the modem. See page 13.
3. Connecting to a transmission line. See page 25.
4. Connecting to a voltage source. See page 27.
5. Connecting a DTE device. See page 28.
Finding a Suitable Location
The location you select should provide easy access to the back panel communications interface(s) and front panel power interface. It should also let you view all the LEDs on the front panel.
Note: Telenetics also offers a rack-mount version of this modem
(Model DSP9612RM) as a plug-in module for the
Telenetics/UDS RM16M Central Site Modem Rack. For more information, contact Telenetics Corporation’s Sales Department at (949) 455-4000.
Page 12
Configuring the Modem
Configuring the Modem
You configure the modem using the three sets of DIP switches on the bottom of the modem.
,
IMPORTANT
It is important to follow the three steps described below, in the order shown, to ensure that you configure your modem properly using the modem DIP switches:
1. Use DIP switch 3 (SW3) to configure the modem for your host DTE interface and network topology.
Using SW3, you select the modem to operate in high-speed fast-poll or low-speed (FSK) mode.
2. If you set SW3 for FSK mode in step 1, use DIP switch 2 (SW2) to configure the modem for either
Bell 202T or ITU-T V.23 compatibility.
Otherwise, you can use the modem in fallback mode.
3. Use DIP switch 1 (SW1) to select the modem’s transmitter output level and receiver dynamic range. The SW1 settings apply for both high-speed fast-poll and low-speed (FSK) modes.
Page 13
Installation
SW1 DIP Switch Settings
SW1 is an 8-position DIP switch. Table 2-1 shows the modem switch settings for DIP switch SW1. A description of the SW1 switch settings follows the table.
Note: SW1 settings apply for both high-speed fast-poll and lowspeed (FSK) modes
Table 2-1. Modem Switch Settings for DIP Switch SW1
Switches
ON
Switch Settings
OFF (Default)
SW1-1 − 1-4: Transmit Level (page 15)
SW1-5: Receiver Dynamic Range
(page 16)
(see Table 2-2 on page 15)
−10 to −43 dBm +3 to −30 dBm
SW1-6: TX Cable Equalizer (page 16) Enabled
SW1-7: RX Cable Equalizer (page 16) Enabled
SW1-8: Anti-streaming (page 16) Active
Disabled
Disabled
Inactive
Page 14
Transmit Level
0 dBm
−1 dBm
−2 dBm
−3 dBm
−4 dBm
−5 dBm
−6 dBm
−7 dBm
−8 dBm
−9 dBm
−10 dBm
−11 dBm
−12 dBm
−13 dBm
−14 dBm
+3 dBm
Configuring the Modem
SW1-1 through SW1-4 − Transmit Level
Switches SW1-1 through SW1-4 adjust the modem’s transmit level.
Table 2-2 shows the transmit levels you can select using these switches.
Table 2-2. Transmit Levels
OFF
OFF
ON
ON
ON
ON
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
ON
ON
SW1-1
SW1 through SW4 Switch Settings
SW1-2 SW1-3 SW1-4
ON
ON
ON
ON
OFF
OFF
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
Page 15
Installation
SW1-5 − Receiver Dynamic Range
SW1-5 ON = − 10 to −43 dBm
OFF = +3 to −30 dBm
For a low receive signal level, set SW1-5 to ON ( −43 dBm ). For short distances or to select a strong receive signal, set SW1-5 to OFF.
SW1-6 and SW1-7 − Cable Equalizer (Fast-Poll Mode Only)
SW1-6 ON = Enable TX Cable Equalizer
OFF = Disable TX Cable Equalizer
SW1-7 ON = Enable RX Cable Equalizer
OFF = Disable RX Cable Equalizer
To improve or extend the modem’s polling performance, use the fixed
Compromise Cable Equalizer when polling on long metallic circuits.
The cable equalizer is active only when the modem is in fast-poll mode
(SW3-1 set to OFF).
SW1-8 − Anti-streaming
SW1-8 ON = Anti-streaming active
OFF = Anti-stream inactive
Typically, anti-streaming is used in multi-point applications to prevent a malfunctioning slave modem from occupying the line indefinitely.
When anti-streaming is active, the modem can transmit data for a maximum of 27 seconds before the transmitter turns off automatically.
The modem then looks for an ON-to-OFF Request To Send (RTS) transition before proceeding with normal operation. Anti-streaming can be selected in either high-speed or low-speed mode.
Page 16
Configuring the Modem
SW2 DIP Switch Settings
SW2 is an 8-position DIP switch. Table 2-3 shows the modem switch settings for DIP switch SW2. A description of the SW2 switch settings follows the table.
Table 2-3. Modem Switch Settings for DIP Switch SW2
Switches
ON
Switch Settings
OFF (Default)
Bell 202 SW2-1: FSK Mode (page 18)
SW2-2: Receiver Squelch (page 18)
(valid for FSK mode, 2-wire half-duplex operation only)
Turnaround
Squelch (Bell
202): 8ms
Turnaround
Squelch (V.23):
150ms
SW2-3: FSK Soft Carrier (page 19)
SW2-4 and SW2-5: FSK RTS-CTS
Delay (page 19)
V.23
Disabled
Turnaround
Squelch (Bell 202):
0ms
Turnaround
Squelch (V.23):
0ms
Enabled
(see Table 2-4)
SW2-6: FSK CD Delay (page 20)
SW2-7: Remote Loopback (page 20)
23ms
Enabled
SW2-8: Reserved (Test Only) (page 20) Test
6ms
Disabled
Normal
Page 17
Installation
SW2-1 FSK Mode
SW2-1 ON = ITU-T V.23 mode
OFF = Bell 202 mode
The modem has two FSK modes:
Bell 202, which supports data rates from 0 to 1800 bps
ITU-T V.23, which supports data rates from 0 to 1200 bps
SW2-1 configures the modem for either of these FSK modes. Setting
SW2-1 to ON selects ITU-T V.23 mode. In this mode, the modem complies with ITU-T (CCITT) recommendation V.23 with the following parameters:
Mode 2 modulation only
No backward channel
No provisions for disablement of echo suppressors
DTR (circuit 108) is ignored
Setting SW2-1 OFF selects Bell 202 mode.
SW2-2 Receiver Squelch (FSK Mode 2-Wire Half-Duplex Only)
SW2-2 ON = 8ms for Bell 202, 150ms for ITU-T V.23
OFF = 0ms
SW2-2 configures the turnaround squelch delay and is valid when the following are active:
FSK mode (SW3-1 ON)
2-wire half-duplex operation (SW3-7 ON)
Setting this switch to OFF configures the modem to enable its receiver immediately after the Request To Send (RTS) signal is turned off.
When this switch is set to OFF and the modem is configured for 2-
Page 18
Configuring the Modem wire, half-duplex mode (SW3-7 ON), the modem squelches the receiver after RTS is turned off to prevent far-end echoes from causing data errors. The duration that the modem squelches the receiver is either:
8 milliseconds if the modem is configured for Bell 202 mode
(SW2-1 OFF)
150 milliseconds if the modem is configured for ITU-T V.23 mode
(SW2-1 ON)
SW2-3 FSK Soft Carrier (Bell 202 FSK Mode Only)
SW2-3 ON = None
OFF = 8ms
SW2-3 controls the soft carrier and is valid for Bell 202 FSK mode only (SW2-1 set to OFF). Setting this switch to OFF configures the modem to transmit a 900 Hz soft carrier to the remote modem for 8 milliseconds after RTS is turned off. Setting this switch to ON prevents the modem from transmitting a soft carrier after RTS is turned off.
SW2-4 and SW2-5 RTS-CTS Delay (Bell 202 Mode Only)
Switches SW2-4 and SW2-5 determine the duration of the RTS-CTS delay in Bell 202 mode. Table 2-4 shows how to set these switches to select the appropriate setting.
Table 2-4. RTS-CTS Delay Settings in Bell 202 Mode
To Select a Delay of…
8ms
33ms
59ms
219ms
Set SW2-4 to…
OFF
OFF
ON
ON
And Set SW2-5 to…
OFF
ON
OFF
ON
Page 19
Installation
When the modem is configured for V.23 operation (SW2-1 ON), the
RTS-CTS delay is fixed at 33 ms.
SW2-6 FSK CD Delay (Bell 202 Mode Only)
SW2-6 ON = 23ms
OFF = 6ms
SW2-6 selects the FSK CD delay and is valid when Bell 202 mode is active (SW2-1 OFF). Setting SW2-6 ON configures the modem to turn on CD 23 milliseconds after it detects a valid carrier signal. Setting this switch to OFF configures the modem to turn on CD 6 milliseconds after it detects a valid carrier signal.
This switch setting is deactivated when the modem is configured for
V.23 mode (SW2-1 ON) and a delay of 18 milliseconds is used instead.
SW2-7 Remote Loopback
SW2-7 ON = Loopback enabled
OFF = Loopback disabled
During instances of channel noise, the modem may mistaken a received preamble as a request to go into remote digital loopback. Setting SW2-
7 to OFF prevents the modem from participating in a remote digital loopback with another modem. SW2-7 does not prevent the modem from sending a remote digital loopback request to a remote modem.
SW2-8 − Reserved (Test Only)
SW2-8 Must be OFF
SW2-8 must be in the OFF position for normal operation.
Page 20
Configuring the Modem
SW3 DIP Switch Settings
SW3 is a 10-position DIP switch. Table 2-5 shows the modem switch settings for DIP switch SW3. A description of the SW3 switch settings follows the table.
Table 2-5. Modem Switch Settings for DIP Switch SW3
Switches
SW3-1: Fast Poll/FSK (page 22)
SW3-2: Data Rate (page 23)
FSK
ON
Switch Settings
OFF (Default)
4800 bps
Fast Poll Auto-Rate
9600 bps
SW3-3: Async Character (page 23)
SW3-4: Auto RTS (page 23)
11 bits
Enabled
10 bits
Disabled
SW3-5: Transmitter Termination (page
24)
Switched by RTS 600 Ω
SW3-6: Reserved (Test Only) (page 24) Test Normal
SW3-7: 2- or 4-wire (page 24) 2-wire, half-duplex 4-wire, full-duplex
SW3-8: Carrier Control (page 25)
SW3-9: Rx Termination (page25)
SW3-10: Signal Ground and Earth
Ground Option (page 25)
Constant
600 Ω
Connected
Switched
High Rx Impedance
Separated
Page 21
Installation
SW3-1 − Fast Poll Auto Rate/FSK
SW3-1 ON = Low-Speed Mode (FSK)
OFF = High-Speed Mode (Fast Poll)
The modem has two operating modes:
FSK mode, which supports data rates from 0 to 1800 bps.
Fast-poll mode, which supports data rates of 4800 and 9600 bps.
SW3-1, along with the Data Rate Selector (DRS) pin on the modem’s
RS-232 connector, configures the modem for either FSK or fast-poll mode. Table 2-6 shows how SW3-1 and the DRS signal configure the modem for these operating modes.
Table 2-6. Modem Operating Mode
To Select…
Fast-poll mode
FSK mode
FSK mode
Set SW3-1 to…
OFF
OFF
ON
And the DRS Signal…
Is not connected or is set
HIGH
Is set LOW
Doesn’t care
You should use the DRS signal in RTS control mode. It does not work in either constant carrier mode (SW3-8 set to ON) or in the auto-RTS mode (SW3-4 set to ON). The DRS signal is only sampled when the transmitter is idle (when not sending a preamble, data, or a turn-off sequence).
Note that DRS controls both the transmitter and receiver. If DRS changes states while the modem is receiving a preamble, data, or a turn-off sequence, the state of the receiver is unknown until the carrier drops and a new preamble is received. We recommend that DRS does not change states until both the local and remote modems’ transmitters are in the idle state. When they are, both the local and remote modems’
DRS signal should change states.
Page 22
Configuring the Modem
SW3-2 − Data Rate (Fast-Poll Mode Only)
SW3-2 ON = 4800 bps
OFF = 9600 bps
SW3-2 configures the modem speed. When the modem is in highspeed fast-poll mode (SW3-1 OFF), setting SW3-2 ON selects 4800 bps, while setting SW3-2 OFF selects 9600 bps.
SW3-3 − Async Character (Fast-Poll Mode Only)
SW3-3 ON = 11 bits
OFF = 10 bits
Switch SW3-3 selects whether the async character is 10 or 11 bits long.
When the modem is in high-speed fast-poll mode (SW3-1 OFF), setting SW3-3 ON selects an 11-bit async characters, while setting
SW3-3 OFF selects a 10-bit async character.
SW3-4 − Auto RTS (Fast-Poll Mode Only)
SW3-4 ON = Enable Auto RTS
OFF = Disable Auto RTS
For data terminals that do not support hardware RTS, set SW3-4 to ON to enable auto RTS mode. In this mode, TXD is detected at the modem and an internal RTS signal is turned ON. After training completes, the
TXD is transmitted to the remote modem. The transmitter turns off if no TXD is detected after 1 character length of idle time. Auto RTS is used in fast-poll mode only (SW3-1 set to OFF).
Page 23
Installation
SW3-5 − Transmitter Termination
SW3-5 ON = Switched by RTS
OFF = 600 Ω
SW3-5 is used for multi-point configuration networks. When multiple modems are connected on the same metallic circuit:
The transmitter termination should be of high impedance if the modem is not transmitting.
The transmitter is only terminated with 600 ohms when RTS is asserted.
This configuration should be used for all slave modems to prevent the transmitting modem from being unnecessarily burdened. To select this configuration, set SW3-5 ON on the slave modems.
If you use the modem with transmission lines that are transformercoupled or with an impedance-isolated network (such as a transformer bridge), set SW3-5 OFF for proper operation.
SW3-6 − Reserved (Test Only)
SW3-6 Must be OFF
SW3-6 must be in the OFF position for normal operation.
SW3-7 − 2-/4-Wire Operation
SW3-7 ON = 2-Wire, Half-Duplex Mode
OFF = 4-Wire, Full-Duplex Mode
SW3-7 configures the modem for 4-wire full-duplex or 2-wire halfduplex operation.
Page 24
Configuring the Modem
SW3-8 − Carrier Control
SW3-8 ON = Constant
OFF = Switched
SW3-8 selects either constant or switched carrier. Constant carrier allows DTEs, such as asynchronous dumb terminals or RTUs, to operate with modems, without the input RTS signal. When constant carrier mode is enabled (SW3-8 set to ON), the modem forces the transmit carrier active and the RTS-CTS delay is minimum (<0.5 ms.).
You can use constant carrier in 4-wire, point-to-point or multi-point applications (from master to slave modems).
In switched-carrier mode (SW3-8 set to OFF), the RTS/CTS delay is active.
SW3-9 − RX Termination
SW3-9 ON = Enable Rx Termination
OFF = Disable Rx Termination
SW3-9 selects whether RX termination is enabled for a modem. If you set this switch ON, the receiver is terminated with 600 Ω. If you set this switch OFF, the receiver is not terminated.
SW3-10 − Grounding Option
SW3-10 ON = Signal Ground and Earth Ground are Connected
OFF = Signal Ground and Earth Ground are Separated
Page 25
Installation
Connecting to a Transmission Line
The modem has a transmission line interface that can be configured for
2- or 4-wire, analog connection, where one pair is used to transmit data
(Tx and Tx) and one pair is used to receive data (Rx and Rx). Table 2-7 shows the pin numbers and corresponding signals for the modem.
Figure 2-4 shows the transmission line interface.
Note: For communication to occur, the Rx line of one modem must connect to the Tx line of the other modem. The modem’s Tx/Rx pair are non-polarized.
Note: The modem does not support leased-line operations with DC current.
Table 2-7. Transmission Line Connector Pin Assignments
This Pin Number…
1
2
3
4
Corresponds to This Signal…
Rx
Rx
Tx
Tx
Page 26
Connecting to a Voltage Source
Figure 2-4. Transmission Line Interface
Connecting to a Voltage Source
The back panel of the modem provides the power interface. For convenience, the modems can be powered from the following power sources:
Model DSP9612FP (AC version): 85 to 265 Volts AC, 50 to 60
Hz, single phase or 85 to 400 VDC
Model DSP9612-LV (DC version): 10 to 53 Volts DC. The model
DSP9612-LV comes with a shielded power cord for making this connection.
Figure 2-1 on page 10 shows the connection to the Model
DSP9612FP’s power interface. Figure 2-2 on page 11 shows the connection to the Model DSP9612-LV’s power interface.
Page 27
Installation
,
WARNING
Before you connect a voltage source, observe the following power supply voltage guidelines.
Otherwise, you will void your warranty if the wrong voltage is applied.
Be sure the voltage source is within the permitted ranges shown above. Otherwise, your modem and any attached devices may be damaged.
Customer-supplied cables must be suitable for the site environmental conditions.
Screw terminals on the power interface accept 24 to
16 AWG. However, surge protection is guaranteed only if the ground wire is greater than 18 AWG and if there is a solidly earthed ground connection.
Be sure the power source is not controlled by a wall switch, which can be inadvertently turned off, shutting off power to the modem.
Connecting an RS-232 Device
The modem back panel provides a female, 25-pin RS-232 connector that accepts an attached RS-232 device (see Figure 2-1 on page 10).
This connector accepts a standard connection to a DTE (RTU) that conforms to the pin assignments shown under “RS-232 (DTE)
Interface” on page 38.
Page 28
LEDs
LEDs
The front panel of the modem provides the LEDs shown in Table 2-8.
Table 2-8. Modem LEDs
LED
PWR
RTS
Color
Green
Yellow
Yellow
Description
Power Input
Request To Send
Clear To Send CTS
TD
RD
Yellow
Yellow
Yellow
Transmit Data
Receive Data
Carrier Detect CD
MR
ALB
Yellow
Red*
Modem Ready
Analog Loopback
DLB Red* Digital Loopback
* When the modem is in remote loopback, both the ALB and DLB LEDs go ON.
Page 29
Installation
Loopback Control Switch
The front panel of the modem has a push button for initiating the following loopback diagnostic tests:
Local analog loopback started by pressing the button one time.
Local digital loopback started by pressing the button two times.
Remote digital loopback set the local modem’s RTS signal to low. Then press the remote modem’s diagnostics button three times and raise the local modem’s RTS signal to start the test. The
ALB and DLB LEDs go ON when the modem is in remote digital loopback. This test is only available in fast-poll mode only.
Figure 2-4 illustrates these three diagnostics.
Figure 2-4. Loopback Diagnostics
Page 30
Appendix A
Troubleshooting
I n the event you encounter a problem using your Telenetics modem, refer to the troubleshooting information in this appendix.
,
IMPORTANT
If you encounter a problem with your modem, be sure the switches on the bottom of the modem are set to the appropriate positions. If a switch is halfway between an on and off setting, the modem will not operate properly.
Problem Solving
Table A-1 offers troubleshooting solutions for modem problems.
Table A-1. Troubleshooting Suggestions
If…
Modem does not respond to the attached DTE and the all
LEDs are off.
Perform These Procedures…
Check the power supply input for your specific model (see page 27).
Modem does not receive data, and the DCD and RxD LEDs are off.
The receive line pair may be disconnected from the modem. Make sure the transmission line connection to the modem is accurate and secure.
The receive signal level may be below the CD threshold. Set SW1-5 ON to see whether configuring the modem for a −43 dBm threshold resolves the
Page 31
Troubleshooting
If…
Table A-1. Troubleshooting Suggestions
Perform These Procedures… problem.
The RTS, CTS, and TxD
LEDs do not blink.
The attached terminal or DTE may not be sending data to the modem. Verify that data is being transmitted. If data is being transmitted, make sure the RS-
232 cable is sound and securely connected to the modem and terminal or DTE.
Page 32
Appendix B
DIP Switch Summary
Switches
ON
Switch Settings
OFF (Default)
SW1-1 − 1-4: Transmit Level (page 15)
SW1-5: Receiver Dynamic Range
(page 16)
(see Table 2-2 on page 15)
−10 to −43 dBm +3 to −30 dBm
SW1-6: TX Cable Equalizer (page 16) Enabled
SW1-7: RX Cable Equalizer (page 16) Enabled
SW1-8: Anti-streaming (page 16) Active
Disabled
Disabled
Inactive
SW2-1: FSK Mode (page 18) V.23
SW2-2: Receiver Squelch (page 18)
(valid for FSK mode, 2-wire half-duplex operation only)
Turnaround
Squelch (Bell
202): 8ms
SW2-3: FSK Soft Carrier (page 19)
Turnaround
Squelch (V.23):
150ms
Disabled
Bell 202
Turnaround
Squelch (Bell 202):
0ms
Turnaround
Squelch (V.23):
0ms
Enabled
SW2-4 and SW2-5: FSK RTS-CTS
Delay (page 19)
SW2-6: FSK CD Delay (page 20)
(see Table 2-4)
23ms 6ms
SW2-7: Remote Loopback (page 20) Enabled Disabled
SW2-8: Reserved (Test Only ) (page 20) Test Normal
Page 33
DIP Switch Summary
Switches
ON
Switch Settings
OFF (Default)
SW3-1: Fast Poll/FSK (page 22)
SW3-2: Data Rate (page 23)
SW3-3: Async Character (page 23)
SW3-4: Auto RTS (page 23)
SW3-5: Transmitter Termination (page
24)
FSK
4800 bps
11 bits
Fast Poll Auto-Rate
9600 bps
10 bits
Enabled Disabled
Switched by RTS 600 Ω
SW3-6: Reserved (Test Only) (page 24) Test
SW3-7: 2- or 4-wire (page 24)
Normal
2-wire, half-duplex 4-wire, full-duplex
SW3-8: Carrier Control (page 25)
SW3-9: Rx Termination (page25)
SW3-10: Signal Ground and Earth
Ground Option (page 25)
Constant
600 Ω
Connected
Switched
High Rx Impedance
Separated
Page 34
Appendix C
Specifications
General Specifications
Data rate: 9600, 4800, or 0-1800 bps asynchronous
Data format:
DTE interface:
Line conditions:
8 or 9 data bits with 1 or more stop bits
EIA RS-232 or V.24 compatible
TELCO Voice band 4- or 2-wire leased line, conditioned or unconditioned
Private metallic circuits up to 9.5 miles (24
AWG) without cable equalizer. Up to 15.0 miles
(24 AWG) with TX and RX cable equalizer
Operating modes: 2-wire half-duplex or 4-wire full-duplex
Modulation: High-speed fast poll – Telenetics proprietary
FSK, Bell 202T or V.23 compatible
• Mark = 1200 Hz (1300 Hz, V.23)
• Space = 2200 Hz (2100 Hz, V.23)
• Soft Carrier = 900 Hz (Bell 202T only)
Equalizer: Automatic, adaptive
RTS-CTS Delay: 23 ms. (fast poll)
8, 33, 59, or 219 ms (Bell 202)
33 ms (V.23)
Page 35
Specifications
Receiver dynamic range: 0 to –30 dBm or –10 to –43 dBm
Operating temperature:
Power supply:
Surge protection: Leased line, up to 15KV
Carrier control: Constant or switched, DIP switch selectable
Carrier loss
recovery: Train on Data
Throughput delay: Less than 10 milliseconds for fast polling.
Auto RTS:
-40 °C to +85°C
Wide range switching power supply:
• DSP9612FP (AC version): 85 to 265Volts
AC, 50/60 Hz, single phase or 85 to 400
VDC
• DSP9612-LV (DC version):10 to 53 Volts
DC
Anti-Streaming:
Support DTE without hardware RTS
(high speed only)
27-second timer to prevent transmitter lock-up network
Mechanical Specifications
Enclosure:
Dimensions:
Aluminum with removable front and rear panels
5.70” wide x 8.30” long x 1.50” high
Weight:
Interface connectors
1.9 lbs.
Leased line: 4-position screw terminal.
Data Terminal
Equipment: DB-25 female connector
Page 36
Interface Connector Pin Assignments
Interface Connector Pin Assignments
Leased Line Terminal Block Pin Assignments
This Pin
Number…
1
2
3
4
Corresponds to
This Signal…
Rx
Rx
Tx
Tx
Back-to-Back Connection to a Second Modem
Page 37
Specifications
RS-232 (DTE) Interface
Signal Name
Earth GND
TXD
RXD
RTS
CTS
DSR
SG
DCD
DRS
Modem Input/Output
Input
Output
Input
Output
Output
Output
Input
DB25 Pin
1
2
5
6
3
4
7
8
23
Description
Earth Ground
Transmit Data
Receive Data
Request To Send
Clear To Send
Data Set Ready
(Modem Ready)
Signal Ground
Data Carrier
Detected
Data Rate Select
Environmental Specifications
Operating temperature: -40 to + 85 o C
Storage temperature: -40 to +125 o C
Operating humidity: 5 to 95 %, non-condensing.
Line Isolation: 3750 V RMS
Surge protection: Leased line up to 15K VA
Page 38
Compliances
Compliances
The modem is designed to meet the following agency requirements:
EMI/RFI:
FCC part 15 for Class A computing device
Industry Canada. (Emissions)
Page 39
Specifications
N OTES
Page 40
Appendix D
Compliances
This device complies with Part 15A of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class
A digital device, pursuant to Part 15A of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and the receiver.
Connect the equipment to an outlet on a circuit other than the one to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
If none of these actions resolves the problem, consult your distributor or an experienced radio/television technician for additional suggestions.
Additionally, Section 15.838, paragraph d), of the FCC Rules and Regulations states: “Where special accessories, such as shielded cables, are required in order to meet FCC regulations, shielded cables must be used with this equipment. Operation with non-approved equipment or unshielded cables is likely to result in interference to radio and TV reception. The user is cautioned that changes and modifications to this equipment without the approval of the manufacturer could void the user’s authority to operate this equipment.
Page 41
Compliances
Department of Canada Statement
This Class A digital apparatus meets all requirements of the Canadian
Interference-Causing Equipment Regulations.
Cet appareil numerique de la classe A respecte toutes les exigences du
Reglement sur le materiel brouilleur du Canada.
Page 42
Appendix E
Limited Product
Warranty
Telenetics warrants that the Product sold will be free from defects in material and workmanship and perform to Telenetics' applicable published specifications for a period of
18 months from the date of delivery to Customer or 12 months from placement into service, whichever occurs first. The liability of Telenetics hereunder shall be limited to replacing or repairing, at its option, any defective Products which are returned F.O.B., Telenetics' facility, Lake Forest, California (or, at Telenetics' option refunding the purchase price of such products). In no case are Products to be returned without first obtaining permission and a customer return order number from Telenetics. In no event shall Telenetics be liable for any consequential or incidental damages.
Products which have been subject to abuse, misuse, accident, alteration, neglect, unauthorized repair or installation are not covered by the warranty. Telenetics shall make the final determination as to the existence and cause of any alleged defect. No liability is assumed for expendable items such as lamps and fuses. No warranty is made with respect to custom products or Products produced to Customer's specifications except as specifically stated in writing by Telenetics in the agreement for such custom products.
This warranty is the only warranty made by Telenetics with respect to the goods delivered hereunder, and may be modified or amended only by a written instrument signed by a duly authorized officer or Telenetics and accepted by Customer.
This warranty and limitation extends to customer and to users of the product and is in lieu of all warranties with respect to the product whether express, implied, or statutory, including without limitation the implied warranties of merchantability and fitness for a particular purpose.
Page 43
Appendix F
RMA Procedure
Return Merchandise Authorization (RMA) Procedure
Before returning any Telenetics product, an RMA number must be obtained.
Before asking for an RMA number, ascertain that the product was purchased from
Telenetics. If you bought the product from a Distributor or Systems Integrator, the product should be returned to that vendor.
The most convenient method to obtain an RMA number for a product purchased from
Telenetics is to send an email to [email protected]
. Information required must include
Your Company Name, address, the actual address that we would use to return the product to you. Please include any Mail Stop or specific delivery information. The City, State, and zip code are all required. Your phone and FAX numbers. Your email address.
If the above information is on your letterhead, that format is acceptable.
For each item you wish to return: List the product model number, usually found on the serial number tag, the serial number for each item you wish to return, a description of the problem you are encountering, and the cause of the problem (if known).
A product support specialist may call to verify that the product is properly installed or may ask you to perform tests to insure that the product has actually failed.
After review of the problem, an RMA number will be assigned, you will be notified by email or FAX.
The product must be properly packed and returned to:
Telenetics
25111 Arctic Ocean
Lake Forest, CA 92630
The RMA number must be legibly displayed on the shipping carton.
No RMA’s will be issued without a product review, Telenetics will not be responsible for any product returned without an RMA number.
In the near future the RMA form will be available on our Web site
Telenetics.com/support/rma. Fill in all blanks and click on the “Submit” button.
If you think the product may be out of warranty, include a method of payment for repairs, either a Purchase Order number, or Credit card number, Card Holder Name, Date of
Expiration on the RMA request. Repairs currently require 5 – 10 working days, and are returned UPS second day air.
Page 44
Page 45
RMA Procedure
advertisement
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Related manuals
advertisement