•
Issue the following SNANCP command to check the line:
SNANCP> SHOW LINE
line-id COUNTERS
If the Carrier Lost counter is high, check your modems. Counter
errors might also indicate that the line is noisy or defective. Ask the
leased-line provider to check the line.
4.
Verify the communications path by running loopback tests for the device,
cable, and modem. See Chapter 2 for information on loopback tests.
5.
If you have eliminated all possible line and modem problems, check the
cables between the DEC MicroServer and the local modem:
•
Make sure that all the cables between the DEC MicroServer and the
modems are correctly connected. If you find any loose connections,
correct them; then reload the system, if necessary.
•
Use loopback tests to check the adapter cable and any modem extension
cables. Chapter 2 describes loopback tests.
Ensure that you have the appropriate adapter cables. In particular,
note that some early revisions to the RS-232 standards are incom-
patible with V.24 cables. See Installing the DEC MicroServer for
information about the RS-232-C adapter.
•
Replace any defective cables, and reload the system.
6.
If you cannot access the IBM system, refer to Section 1.4, Session Problems.
1–10 Solving DECnet SNA Gateway for Synchronous Transport Problems
