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Connecting a Workstation Variable Document_Name
11-5
4. Power the modem off and return the modem to dumb mode by setting
hardware switch 8 to OFF (up). Connect the DB-25 end of the Passport
4460 management cable (NTAU17AA) to a null modem cable. Then
connect the null modem cable to the US Robotics modem (see Figure 11-
2 on page 11-2).
The Passport 4400 unit should now be ready to receive calls.
Note:
If your modem doesn’t support AT commands, consult your
modem documentation for the procedure for your particular
modem.
Testing the Modem Configuration
You can test the modem configuration by using a terminal emulation program
(such as HyperTerminal or ProComm), to call the modem connected to the
Passport 4400 unit. You will see the CLI prompt when you successfully connect.
In Case of Difficulty
Your modem baud rate must match that of the Passport 4400 management port.
If your modem is set to something other than 9600 baud, and you subsequently
reset the Passport 4400 unit to its factory defaults, your modem connection will
fail. In this case, you need to reset the modem to 9600 baud by unlocking the
speed (AT&B0), changing the speed of the PC (or terminal connection) to 9600
baud, then locking the modem to this new speed. For this reason, although it
slows communications with the Passport 4400 unit, it is recommended that you
not change the management port speed from the default value (9600 baud).
Ethernet Connection
If the Passport 4400 unit has already been configured with an IP address, you
can connect your workstation to the unit using the Ethernet port on the Ethernet
Base Module.
Warning:
!
Inaccurate modem settings and incorrect cabling may cause
interruption of service on the Passport 4400 when attempting to
dial in.