Nortel 1002rp, Maintenance And Diagnostics

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Using serial port diagnostic tools Standard 1.11
60 CallPilot
Conducting TSTSERIO tests with the
loopback plug
The TSTSERIO command requires an external loopback connector plug
for its edata, emsr, and eint subtests.
9-pin connector plug
The standard serial loopback connector is a female 9-pin D-sub
connector. This connector has the following pins wired together:
„
CTS (pin 8) wired to RTS (pin 7)
„
SIN (pin 2) wired to SOUT (pin 3)
„
DTR (pin 4) wired to DSR (pin 6)
Once the plug is installed on the serial port, TSTSERIO can be invoked
according to the procedure outlined in the previous section.