Huawei Quidway S9300

6.7 Clock Cable
This section describes the structure and technical specifications of the clock cables.
6.7.1 Introduction
6.7.2 Structure
6.7.3 Technical Specifications
6.7.1 Introduction
The external synchronization interface of the S9300 is used for clock and time synchronization.
The S9300 can be connected to the external clock source or clock source device through the
clock cable.
The clock cable is used to connect the S9300 with the clock interface of the external equipment.
With the cable, the S9300 can receive 2-channel 2.048 MHz or 2.048 Mbit/s synchronous clock
signals provided by the upstream device. The S9300 can also offer 2-channel 2.048 MHz or
2.048 Mbit/s synchronous clock signals to the downstream device.
When the S9300 is connected to the clock interface of the external equipment through the clock
cable, the S9300 can receive the 2-channel TOD or DCLS synchronous clock signals provided
by the upstream device. The S9300 can also offer 2-channel TOD or DCLS synchronous clock
signals to the downstream device.
One end of the clock cable is the RJ45 connector, which is connected to the BITTS interface on
the SRU or MCU of the S9300. The other end of the clock cable is connected to the external
clock device. The connector type depends on the type of the external clock device. The external
clock device connected to the S9300 can be the SubMiniature version B (SMB) clock source,
Boyonet Neil Councilman (BNC) clock source, RJ45 clock source, and RJ45 time source.
Figure 6-6 Clock cable connections
S9300 clock
interface
Transmultiplexer
External clock
device
RJ45 interface SMB interface
SMB/BNC/RJ45
interface
Cable 1
Cable 2
According to the functions and interface types of the external clock device connected to the
S9300, the following cables can be selected:
l If the connected device is the clock source and the RJ45 interface is used:
Cable 1 can be the RJ48 cable. The transmultiplexer or cable 2 is not required.
l If the connected device is the clock source and the SMB interface is used:
Cable 1 can be the RJ45 cable, and cable 2 can be the SMB/SMB trunk cable. The
transmultiplexer is required.
Quidway S9300 Terabit Routing Switch
Hardware Description 6 Cables
Issue 01 (2010-12-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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