Nortel Communication Server 1000M, Руководство по установке и настройке

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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