Nortel Meridian 1 Option 11C, Administration And Maintenance

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Chapter 4 — Network clocking Page 145 of 492
Option 11C ISDN BRI Administration and Maintenance
Example 3 is an example of a “STAR” arrangement— one Hub PBX is linked
to the local exchange and all other PBXs are connected as slaves. When a
second Digital loop from the Meridian 1 which forms the hub of this network
becomes available, it can be used as a Secondary Clock Source in case the
Primary Source fails.
Example 3
Clocking Hierarchy referenced to a Public Network Master Clock
553-7563.EPS
LD 60
TRCK PCK
LD 73:
PREF loop W
SREF <cr>
LD 60
TRCK PCK
LD 73:
PREF loop Z
SREF <cr>
Option 11
Option 11
Option 11
Option 11
LD 60
TRCK PCK
LD 73:
PREF loop Y
SREF <cr>
LD 60
TRCK PCK
LD 73:
PREF loop X
SREF <cr>
LD 60
TRCK PCK
LD 73:
PREF loop A
SREF loop B
Slave Slave
Slave Slave
Master
Clock
Option 11
loop W loop Z
loop Y loop X
loop A
loop B
Local
Exchange
Clocking off Master:
Tracking on Primary
loop W, no secondary
source. Clocking off Master:
Tracking on Primary
loop Z, no secondary
source.
Clocking off Master:
Tracking on Primary
loop Y, no secondary
source. Clocking off Master:
Tracking on Primary
loop X, no secondary
source.