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Test Mode Operation
DTE Controlled Remote Digital Loopback (Pin 21) *RD
To enable DTE Controlled Remote Digital Loopback, enter *RD1.
Enabled, the modem goes into Remote Digital Loopback when it detects
an off-to-on transition of pin 21 while in the online data mode. The test
ends when it detects an on-to-off transition of pin 21 and then returns to
online data mode. To disable this function enter the *RD command.
Command
*RD
*RD1
Note
If the test timeout option is enabled and pin 21 remains high,
the modem returns to online mode at the end of the test
timeout period and does not re-enter the test mode until an
off-to-on transition of pin 21 is detected.
DTE Controlled Local Analog Loopback (Pin 18) *LA
To enable DTE Controlled Local Analog Loopback Test, enter *LA1.
Enabled, the modem goes into local analog loopback when it detects an
off-to-on transition of pin 18. The test ends when it detects an on-to-off
transition of pin 18. To disable, enter *LA.
Command
*LA
*LA1
Note
If the test timeout option is enabled and pin 18 remains high,
the modem returns to idle mode at the end of the test timeout
period and does not re-enter the test mode until an off-to-on
transition of pin 18 has been detected.
7-8
Operation
Ignore pin 21
RDL enabled (pin 21)
Operation
Ignore pin 18
LAL enabled (pin 18)
Modem 3600
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