Figure D–1 Loopback Point Command Qualifiers
LKG−8352−93R
Communications
Modem
Adapter
No qualifier*
Loopback
/INTERNAL
points
DEC
MicroServer
Remote
system
cable
cable
link
/LOCAL
Command
qualifier
or
* Functions performed with a loopback connector.
/MANUAL
/REMOTE
Local
modem
modem
Remote
For example, to loop back through the local modem on channel 1, you use
either:
TEST DATA_LOOPBACK/CH1/LOCAL
or
TEST DATA_LOOPBACK/CH1/MANUAL
Use the first command if your modem recognizes the local loop modem signal.
Use the second if you have to manually set the modem to loopback mode (for
example, by pressing a switch on the modem).
Chapter 2 provides more information on using these commands to test a
communications line.
D.5.2 Modem Signal Tests
The modem signal tests check the modem signals between the
DEC MicroServer and the local modem. The signals can be looped back either
at the DEC MicroServer’s synchronous port or at the end of the adapter cable,
as shown in Figure D–2.
DEC MicroServer Facilities for Problem Solving D–5
