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Connecting a Modem to the Control In, Chain In, or Craft Port of an ADTRAN Product

Connecting a Modem to the Control In, Chain In, or Craft Port of an ADTRAN Product

Article ID: 1581
Q&A

  Connecting a Modem to the Control In, Chain In, or Craft Port of an ADTRAN Product


Q:

Connecting a Modem to the Control In, Chain In, or Craft Port of an ADTRAN product

A:

Introduction

This Technical Support Note describes how to connect a modem to an ADTRAN TSU's Control-In, Chain-In, or Craft port. To connect directly to a terminal, see the related articles link in the right hand pane of this window.

Before you begin

Connecting a Modem to an ADTRAN TSU requires a straight through RJ-45 cable and an adapter. If you do not have an adapter, you can use the following table to assemble one or order one from ADTRAN.

RJ45AdapterChain In PortDescription
17GNDGround - Connected to unit chassis
33RXDATAData received by the TSU
52TXDATAData transmitted by the TSU

Connecting the modem to the TSU

The remote modem can be connected to the TSU using one of three different adapters:

  • DB25 Male to RJ45 adapter (ADTRAN part number 3196ADAPT.004) which can connect directly into the remote modem as shown in Figure 1.
  • DB25 Female to RJ45 adapter (ADTRAN part number 3196ADAPT.003) which requires a DB25M to DB25M serial cable to connect to the remote modem as shown in Figure 2.
  • DB9 Female to RJ45 adapter (ADTRAN part number 3196ADAPT.001) which requires a DB9M to DB25M serial cable to connect to the remote modem as shown in Figure 2.
Figure 1
Figure 2
  1. Connect one end of the RJ-45 straight through cable to the Control-In, Chain-In, or Craft port of the ADTRAN TSU or TDU.
  2. Connect the other end of the RJ-45 cable to the adapter.
  3. Connect the adapter to the serial port of the modem, using a straight through serial cable if needed.
  4. The remote modem must have the following settings:
    DTR:ignored
    Verbal Result Codes:enabled
    Result Codes:suppressed
    Echo:off
    Auto Answer:enable
    Carrier Detect (CD):normal
    Compression:none
    Error correction:none
    Flow control:none
    Set the remote modem for:
    • 9600 BPS
    • 8 data bits
    • no parity
    • 1 stop bit
    The remote modem needs to be configured with AT commands which are stored into non-volatile memory using the &W command. That way, if the remote site loses power, it will automatically come back up with the correct configuration. Some examples of common initialization strings are listed below. Consult your modem manual for the correct commands:

    Hayes - AT&F&Q0&D0&K0S0=1N0S37=9&C1&W0
    USR - AT&F0&D0&HOLI0&KD&M0&N6S0=1&C1&W0
    Multitech - AT&F8&F0&D0&E3&E14&E10$SB9600$MB9600S0=1%ES&W0
    Boca - AT&F&D0&K0&Q0N0%C0S0=1S37=9&W0
  5. Set the host modem for:
    • 9600 BPS
    • 8 data bits
    • no parity
    • 1 stop bit
    The host modem does not have to have settings stored in non-volatile memory. However, it needs to be configured to connect with the remote modem using AT commands. Consult your modem manual for the correct commands.
  6. Terminal settings on the PC are as follows:
    Rate:9600
    Data Bits:8
    Parity:None
    Stop Bit:1
    Flow Control:None
    Terminal Emulation:VT 100
  7. Hold down the CTRL key and enter "PTT" on the keyboard for TSU and TDU units.  Simply press enter a few times for other units.
  8. The unit will respond with a menu screen.

Note: All units will respond with a menu screen, except for 2nd generation TSU MUX products. These units will request a password. The default password is "ADTRAN".


Version history
Revision #:
1 of 1
Last update:
‎02-28-2012 12:03 PM
Updated by:
 
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