Item Specification
Maximum power
consumption
X2UXA: 52 W
X2UXC: 61 W
Weight X2UXA: 2.14 kg
X2UXC: 2.26 kg
5.23 CKM - Clock Board
This section describes the CKM, including the appearance, functions and features, and technical
specifications.
5.23.1 Introduction
5.23.2 Function and Application
5.23.3 Interfaces
5.23.4 Interface Attributes
5.23.5 Technical Specifications
5.23.1 Introduction
Currently, only one type of clock board is available: CKMA. CKMA is a subcard of the main
control board of the S9312, S9306, or S9303. It provides the functions of clock synchronization
and time synchronization and has Building Integrated Timing Supply System (BITS) interfaces.
5.23.2 Function and Application
Function
The CKM consists of the following functional units:
l Clock synchronization unit, that is synchronizing the Ethernet clock.
l Time synchronization unit, that is the IEEE 1588 functional module
The functions of the CKM are as follows:
l Providing the 19.44 MHz system clock and providing external clock signals. The output
clock signal complies with the ITU-T G.813 standard.
l Implementing the IEEE 1588 protocol through the logic to ensure synchronization of time
on the network. The time is accurate to 0.1 us, which complies with the 1588v2 protocol.
Application
The CKM is a pinch board and can be used on the LE03SRUA and LE02SRUB of the S9306
and S9312 and the LE03MCUA of the S9303.
Quidway S9300 Terabit Routing Switch
Hardware Description 5 Boards
Issue 01 (2010-12-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
5-99
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