Nortel Communication Server 1000M, Installation And Configuration Manual

Page: 47 / 122

Installing ISDN BRI hardware Page 47 of 120
ISDN Basic Rate Interface Installation and Configuration
Figure 11
Clock reference cable connection
Clock recovery
The SILC is configured in the slave-slave mode when acting as a trunk
interface. This is configured through the Maintenance Signaling Channel
(MSC). The microcontroller configures the S/T chips on the SILC as
appropriate.
The SILC can recover the network clock from the received data stream using
on-chip phase lock loops. The clock frequency that is recovered is 2.56 MHz.
The jitter and wander conform to CCITT recommendations.
All of the S/T chips on the SILC could be configured as Terminal Equipment
Slaves (TES), but only the clocks recovered from DSL0 and DSL1 are routed
CE I/O panel
C
C
S
I
L
C
IPE I/O panel
NTND70AA
NTND71AA - AD
NTND72AA
IPE shelf
CE shelf
553-7702