Testing with Digital Loopback
Local digital loopback and remote digital loopback together test every
component in the communication link, including the modems. Data sent from
one modem is looped back to it by the other modem without going through
the other computer. Local digital loopback tests the communication link
from the remote modem; remote digital loopback tests the communication link
from the local modem.
When local and remote digital loopback indicate a modem problem rather than
a communication link problem, both parties should run local analog loopback
to test the modems. If both modems test good but problems persist, disconnect
and place another call. If the problem still exists, the phone line or another
component in the communication link is faulty.
For more information, click on one of the following topics:
Remote Digital Loopback L2 - &T6
Remote Digital Loopback with Self Test p; &T7
Local Digital Loopback - &T3
Grant RDL Request from Remote System - &T4
Deny RDL Request from Remote System - &T5
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