Lucent Technologies AT&T 7400B - Manual (Page 47)

DEFINITY Communications System CHAPTER 5: TROUBLESHOOTING
7400B Data Module
User’s Guide Page 5-7
Symptom Problem Solution
Commands are displayed The local terminal device Set the terminal device for one of
without error as they are is set to a speed not the supported speeds: 300, 1200,
typed (echoed), but the supported by the 7400B 2400, 4800, 9600, or 19200 bps.
data module does not Data Module.
respond to any command.
The CONNECT message The data module is Configure the data module to send
is sent without a speed configured to display only CONNECT nnnn messages for all
indication, but the far end the basic set of result speeds except 300 bps by typing
device is not set at 300 codes (option x0).
bps.
atx4 [ Enter ]
The terminal device has A defective or non- Replace the EIA-232-D cable with
its DTR lead turned on, standard (null-modem) one that is wired correctly.
but the TR LED is off. EIA-232-D cable is in use.