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14
T
ESTING
THE
C
ONNECTION
This chapter contains information about:
■
Testing the Business Modem using AT&T
n
■
Testing the Business Modem using S-Register 16
Overview
Your modem can perform digital and remote digital loopback tests. You
can use these tests to check the operations of the transmitter and
receiver, or to locate a problem with a remote device or a telephone line.
Testing is done by sending the AT&T
n
command or by setting Register
S16. Only one test can be performed at a given time. If you send a test
command while the modem is in test mode, you'll receive an ERROR
message.
All loopback testing conforms to ITU-T Recommendation V.54.