Configuring The Modem Software - Nortel Multiservice Switch 7400 Installation & Maintenance

Configuring the modem software

Configure the modem software after you set the modem DIP switches.
Prerequisites
Ensure that you have a computer or terminal with an RS-232 port that you can
temporarily connect to the modem while you adjust the modem settings. The
RS-232 port must be capable of running at 9600 BPS; otherwise, the modem
will not be able to communicate with the local operator port on the device.
Procedure steps
Step
1
2
3
4
Attention: Do not use the V.24 DCE cable (PEC NTBP25xx) provided with the
device. Also, do not use the cable you want to use to connect the modem to the CP.
5
6
Copyright © 2005, Nortel
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Hardware procedures
Action
On the modem, set DIP switch 8 for the smart mode to on (down).
Turn off the power to the modem, then turn it on again.
Set the computer or terminal to use software flow control, also referred to as
the data leads only mode. Otherwise the modem may not be able to
communicate with the computer or terminal.
Connect the modem to the RS-232 port of a computer or terminal using a
standard straight-through serial cable. Typically, the cable has a 9-pin D-sub
female connector at one end and a 25-pin D-sub male connector at the other
end.
Enter the following commands:
• ATQ0 (with a zero, displays result codes so that the modem responds
with OK after this command and whenever an attention command (AT)
is entered)
• ATZ4 (loads a generic hardware flow control configuration when the
cable from Modem cable specifications (page 108)
Otherwise enter ATZ5. Some functionality will be disabled)
• ATQ0 (with a zero, displays result codes and OK)
• AT&M0 (optional command) (with a zero, disables error control; use only
if the dialing modem does not support error control)
• AT&W0 (with a zero, writes the current configuration to non-volatile
memory, NVRAM 0)
• ATY0 (with a zero, uses NVRAM 0 as the default configuration)
Disconnect the modem from the computer or terminal.
Nortel Multiservice Switch 7400
Hardware Installation, Maintenance, and Upgrade
NN10600-175 7.1S1 Standard
PCR7.1 and up October 2005
is to be used.
Nortel Confidential