Link Failure; Aml (Link 0) Will Not Establish; Standard 1.0 October - Nortel Meridian Meridian 1 Maintenance Manual

210 Chapter 4: Diagnosing faults

Link failure

AML (Link 0) will not establish

553-3211-510 Standard 1.0 October 1998

The Application Module or IPE Module supports three links:
¥ Link 0, an LAPB link to the Meridian 1 (AML)
¥ Link 1, an X.25 or a TCP/IP link to a host computer (Meridian Link
only)
¥ Link 2, an asynchronous link to Meridian Mail (optional for Meridian
Link only)
If any or all of these links fail, the application cannot operate normally.
If the AML, which connects an ESDI or MSDL port on the Meridian 1 to a
port on the Application Module, does not come up, follow these steps:
1 Check the link status from the Application Module.
a Log in as mlusr or log in as maint and use the mlusr command.
b Check the status of the link.
mlusr> status link 0
If the response is ÒLink 0 : UpÓ, the AML is properly connected.
If the response is ÒLink 0 : DisabledÓ, enable the link.
mlusr> enable link 0
If the response is ÒLink 0 : Enabled but downÓ, the AML is
properly enabled but has not established a LAPB connection with
the Meridian 1 ESDI or MSDL port. Try to establish the link from
the Meridian 1 (go to step 2 for X11 Release 17/X11 International
Phase 7 or earlier software; go to step 3 for X11 Release 18 or
later software).
c Check the system log file for errors by logging in as mlusr and
using the viewlog command.