Nortel 703t, Maintenance And Diagnostics

Page: 73 / 248

January 2007 Using serial port diagnostic tools
703t Server Maintenance and Diagnostics 73
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 (pin 7) RTS
„
SIN (pin 2) wired to (pin 3) SOUT
„
DTR (pin 4) wired to (pin 6) DSR
Once the plug is installed on the serial port, TSTSERIO can be invoked
according to the “To invoke the TSTSERIO /P command from
Windows” on page 71.