Testing The Courier V.everything Modem Using At&Tn - 3Com Courier Reference

15-2 C 15: T
HAPTER ESTING THE CONNECTION
Testing the Courier
V.Everything
Modem using
AT&Tn
To perform digital loopback and remote digital loopback testing use the
AT&Tn command. You can type in your own data during testing or use
the modem's internal test pattern and error detector. See the following
sections for more detailed information about each AT&Tn command.
For your modem to
End test
local digital loopback
local analogue loopback
not used (error)
Grant Remote Digital Loopback request
Deny Remote Digital Loopback request
Request Remote Digital Loopback
not used (error)
local digital loopback with test pattern
local analogue loopback with test pattern
Example: Sendin
AT&T5
a remote digital loopback test of your Courier V.Everything modem
Disable error control (using the &M0 command, see Appendix B,
Alphabetic Command Summary) before testing. If the modem is
detecting errors and retransmitting the affected data, your results will be
invalid.
will deny any requests from remote devices for
Command
AT&T0
AT&T1
AT&T2
AT&T3
AT&T4
AT&T5
AT&T6
AT&T7
AT&T8
AT&T9