Avaya Configuring WAN Line Services Bedienungsanleitung Seite 129

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Configuring MCE1 and MCT1 Services
117345-B Rev. 00
7-17
Setting the Secondary Clock Source
On DMCT1 net modules and QMCT1 or QMCT1 w/ DS0A link modules only,
you can specify a backup source for timing signals:
Internal -- Uses the clock chip on the link or net module
Port 1 Ext Loop -- Uses the signal coming in from port 1
Port 2 Ext Loop -- Uses the signal coming in from port 2
Port 3 Ext Loop -- Uses the signal coming in from port 3 on a QMCT1
Port 4 Ext Loop -- Uses the signal coming in from port 4 on a QMCT1
Auxiliary Ext -- Uses an external source via port 1 on a QMCT1
See the Secondary Clock parameter on page A-35
for information.
Configuring a DS0A Connection
This section describes how to configure a T1 connection to a QMCT1 w/ DS0A
link module to carry SDLC traffic.
Gathering Required Information
You need the following information from the subscriber:
The data rate of the SDLC connection between the IBM host and the customer
premise equipment (CPE) (see Figure 7-4
).
Use this rate to set the Rate Adaption logical line parameter for both the router
connecting the host side and the router connecting the remote access side.
Valid options are 9.6 Kb/s or 19.2 Kb/s.
To establish a connection, the subscriber must match this rate to that of the
SDLC connection between the controller and CPE on the remote access side.
The line-encoding settings of both the host and CPE, and the controller and
CPE on the remote access side.
Use these settings to set the NRZI Enabled logical line parameter. Valid
options are Enable to configure NRZI (nonreturn to zero inverted) or Disable
to configure NRZ (nonreturn to zero).
The setting of the NRZI Enable parameter on a router connecting the host side
is unrelated to and can differ from that of a router connecting the remote
access side.
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