Huawei CR-NETB Specifications page 2

Quidway® NetEngine 80 Core Router Switching Network Board
Provide highly precise and reliable SDH line interface clock signals (38.88 MHz) to interface
boards.
Have four working modes: fast tracking, normal (tracking), hold and free-run.
Have rough tune and fine tune function, realizing on-site frequency adjustment.
Enable synchronization performance detection, alarming and control.
Have two synchronous link input interfaces, realizing automatic switchover without causing
phase variation.
Communicate with the MPU through active and standby HDLC links, to be monitored,
configured and managed by the MPU.
Specifications
The NETB has four external interfaces: two external timing source input interfaces and two internal
timing source output interfaces.
Module
Interface name
name
External timing source
input interface
CR-NETB
Internal timing source
output interface
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Interface type
Timing source can be acquired
Quantity: 2, SMB
from BITS. Interfaces can be set
interfaces
to 2048 Kbps or 2048 KHz.
Provide
Quantity: 2, SMB downstream
interfaces Interfaces can be set to 2048
Kbps or 2048 KHz.
Description
reference clock
equipment.
to
2