User's Manual

36 Fault management

Nortel Networks Confidential

framework. For example, when you register your phone, a

number of AC instances are invoked to process the registration.

Procedure 2 Clearing the SMDI101 alarm

at the alarm browser

1 This alarm is raised when the Simplified Message Desk

Interface (SMDI) telnet session between the SIP Application

Module and a terminal server is lost. The SIP Application Module

uses the SMDI protocol to communicate information between

itself and a voicemail server. If the connection goes down,

• Message Waiting Indication notification to subscribers stops.

• Calls routed to the voicemail server are not sent to the

appropriate mailbox.

However, depending upon the voicemail server’s capabilities,

the calls may be answered by a default mailbox and the

originator can enter the desired mailbox number in which to

leave a message. In the same way, users may be able to retrieve

their voicemails (for example, they get routed to the default

mailbox and are prompted to enter their mailbox). Again, this

functionality depends upon the voicemail server being used.

The SIP Application Module repeatedly tries to re-establish the

telnet session to the terminal server. If the alarm does not go

away in a few minutes, then the terminal server needs to be

checked and possibly re-booted. Also, administrators should

check the voicemail server to make sure it is running correctly. If

problems persist, contact your next level of support.