Nortel Networks 553-3901-200 User Manual
Page 41

Install ISDN BRI hardware
Page 41 of 46
ISDN Basic Rate Interface
Installation
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 set up through the Maintenance Signaling Channel (MSC).
The microcontroller configures the S/T chips on the SILC as appropriate.
The SILC may recover the network clock from the received data stream using
on-chip phase lock loops. The clock frequency which is recovered is 2.56
MHz. The jitter and wander conform to CCITT recommendations.
CE I/O panel
C
C
S
I
L
C
IPE I/O panel
NTND70AA
NTND71AA - AD
NTND72AA
IPE shelf
CE shelf
553-7702
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