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Line and Modem Test
The line and modem test verifies the local modem, the remote modem,
and the communications line between them. With this test, the local
modem loops back received data to the transmitter and transmits the
data to the remote modem. These characters can originate either from a
locally attached DTE or by having the modem generate a test pattern.
The following procedure describes how to run the line and modem test
using a locally attached DTE to generate a data pattern.
1.
Place the remote modem in Digital Loopback mode.
2.
Place the local modem in Data mode and transmit a data pattern.
Check for data errors on the Receive Data line
The following procedure describes how to run the line and modem test
using the modem test pattern instead of a data pattern originated by the
local DTE.
1.
Place the remote modem in Remote Test mode.
2.
Place the local modem in Remote Self Test mode. The
TM
LED
should turn ON and remain ON if the data is error free.