Avaya Definity SI, Maintenance Manual, Page: 1970 / 2968

Maintenance Object Repair Procedures
555-233-123 10-1184 Issue 4 May 2002
Maintenance of MPDMs and MTDMs is closely related to, and interacts with, the
Digital Line circuit pack maintenance in some instances and some of the results of
testing MPDMs and MTDMs may be affected by the health of the Digital Line
circuit pack. This interaction should be kept in mind when investigating the cause
of reported data module problems.
Data modules provide a variety of option switches to allow the customer to select
data rates, parity, keyboard dialing, local, and remote loop back, etc. An incorrect
setting of those switches does not affect error and alarm information or test results
described in this section, but it may result in an inoperable condition. Refer to the
Installation Manual provided with the data module for more information about
those options.
The DA data module provides an AT (Hayes) type interface that allows the
customer to select data rates, parity, local, interface mode (linked to digital phone
or stand-alone), and remote loop back, etc. An incorrect selection does not affect
error and alarm information or test results described in this section, but it may
result in an inoperable condition.
There are instances in this document where the service state of a data module is
mentioned. It is helpful to understand what is meant by the different service states
that may exist. An explanation of these service states follows:
■
Out-of-Service—The port, and thus the data module, have been removed
from service. A busyout of a port or removal of the associated Digital Line
circuit pack causes the data module to be placed in the out-of-service
state. Failure of the NPE Crosstalk Test (Test #9) also takes a port
out-of-service.
■
Disconnected—The port is administered but the associated digital link
does not respond. An administered port is put in a disconnected state after
system booting or circuit pack insertion, until a “link reset pass” message is
received from firmware on the associated circuit pack.
■
In-Service—Once the PBX software has received a “link reset pass”
message from the Digital Line port, the port is placed in the in-service
state. In case the “link reset pass” message is missed, and an off-hook
message is received while the port is in the disconnected state,
maintenance software runs an ID request test and the port is put back in
service if a correct response is received.
If the link is disconnected, the port returns to the disconnect state. Note
that it takes a few minutes (less than five) for the state of a data module
port to change from in-service to disconnected after the data module is
disconnected from the local PBX loop.