Testing with Analog Loopback
Use the analog loopback tests if you suspect the modem is causing errors
in data transmission. The local analog loopback test verifies both the local
modem and the local data terminal equipment. If this test fails, the DTE
may be at fault. The local analog loopback with self test verifies the integrity
of the local modem only. If this test fails, the local modem is at fault.
If the modem passes both of these tests, try the remote digital loopback
with self test to verify the modem-to-modem communication path. Click the
following topics for more information:
Local Analog Loopback L3 - &T1
Local Analog Loopback with Self Test - &T8
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