Using the RS-232 Serial Port for an Out-of-band Connection
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Using the RS-232 Serial Port for an Out-of-band Connection
The RS-232 serial communications port on the Model 281xSA hub can be used
for an out-of-band connection to the telephone voice network through an
external modem. You must provide the cable between the Model 281xSA hub
and the modem.
To connect a Model 281xSA hub to an out-of-band voice network, follow these
steps:
1.
Set up the modem, following instructions in the user’s guide for the
modem.
a. Power up the modem.
b. Configure the modem. Be sure to set auto-answering ON.
c. Connect the modem to telephone line through an RJ-11 jack.
2.
Connect the modem to the Model 281xSA hub.
a. Connect the plug on the RS-232 serial communications cable to the
socket on the modem.
b. Connect the socket on the RS-232 serial communications cable to
the DB-25 plug on the Model 281xSA hub.
3.
Power up the Model 281x or push the reset switch.
NOTE:
Be sure the modem is powered up before you power up or reset the
Model 281xSA hub.