Register Descriptions
F-70 AT Commands
NOTES
•
The modem does not support diagnostic tests in Bell 103, V.13, V.21, or V.23
modes.
•
Commands enable and disable loopback test options. Register S16 is a read-only
register that displays loopback test option status, and is available only when the
modem is in normal or direct mode. The modem supports all loopback tests at
1200 bps or higher.
S18 Test Timer
Range:
0 - 255 seconds
Default:
0 seconds (disables timer)
Sets how long the modem conducts a loopback diagnostic test. Register S18 is
available only in normal or direct mode.
When register S18 is set to 0, type AT&T0 followed by Enter to end a test.
NOTE
Register S18 is not supported for V.54 loopback tests by switch or circuit.
5
initiate remote digital
loopback with self-test
0 disabled
1 enabled
6
initiate local analog
loopback with self-test
0 disabled
1 enabled
7
not used
Bit Position
Function
Decimal Value
