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Configuring MCE1 and MCT1 Services
308648-14.00 Rev 00
7-5
Setting the Clock Parameters
Clock parameters define the timing sources that apply to ports and DS0 timeslots
that an MCE1 or MCT1 link or net module supports.
Table 7-1
lists the options supported by specific link and net modules.
Note:
DMCE1 and DMCT1 link modules contain a single clock chip that
provides the timing signals for both ports. Therefore, clock parameters that
you set for the first port apply to the second port on the module. Timing is
independent for the two ports on a DMCT1 net module, and for the four ports
on a QMCT1 and QMCT1 w/ DS0A link module. For these modules, you
select the timing source for each port.
Table 7-1. MCE1 and MCT1 Clock Source Options
BCC Clock
Source
Options
Site Manager
Clock Source
Option
Applicable
Link Modules
Applicable
ASN
Net Modules Result
internal Internal All All Use the clock chip on the link or net
module.
loop1 Port1 Ext Loop DMCT1, QMCT1,
QMCT1 w/ DS0A
DMCT1 Use the signal coming in from port 1.
loop2 Port2 Ext Loop DMCT1, QMCT1,
QMCT1 w/ DS0A
DMCT1 Use the signal coming in from port 2.
loop3 Port3 Ext Loop QMCT1,
QMCT1 w/ DS0A
N/A Use the signal coming in from port 3.
loop4 Port4 Ext Loop QMCT1 N/A Use the signal coming in from port 4.
external Auxiliary Ext MCE1, DMCE1 MCE1 Use an external clock source via
BNC connectors.
MCT1, DMCT1 N/A Use an external clock source via
DB-9 connectors.
QMCT1,
QMCT1 w/ DS0A
N/A Use an external clock source via
port1. This option requires a special
Y cable, Nortel Networks Order No.
AA0018006.
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