Huawei ATN 950B - AND3 ML1 A;AND3 ML1 B - 16 Channels E1 Interface Board; Overview; Functions and Features

5.7 AND3ML1A/AND3ML1B - 16 Channels E1 Interface
Board
This section describes the AND3ML1A/AND3ML1B, a 16 channels E1 electrical interface
board, in terms of the overview, functions, features, working principle, front panel, and technical
specifications.
NOTE
The mapping impedance of an interface on the AND3ML1A is 75 ohm, and the mapping impedance of an
interface on the AND3ML1B is 120 ohm. Except the difference of mapping impedance, the functions and
features of the AND3ML1A and AND3ML1B are the same.
5.7.1 Overview
The AND3ML1A/AND3ML1B (ML1A/ML1B for short) is a 16 channels E1 interface board.
The function version of the ML1A/ML1B is AND2. The AND3ML1A/AND3ML1B is housed
in any of slots 1 to 6.
5.7.2 Functions and Features
The AND3ML1A/AND3ML1B is an E1 interface board. The AND3ML1A/AND3ML1B must
be used with the system control board to access and process 16 channels of E1 services. Services
at interfaces on the AND3ML1A/AND3ML1B can be flexibly configured, and protocols such
as ATM TC, IMA, CES, and ML-PPP are supported.
Table 5-25 lists the functions and features of the AND3ML1A/AND3ML1B.
Table 5-25 Functions and features of the AND3ML1A/AND3ML1B
Function and Feature
Remarks
Basic functions Accesses and processes 16 x E1 signals and supports the ATM TC,
IMA, CES, and ML-PPP protocols.
Supports the hot swappable function.
PRBS Supports the PRBS function in framed or unframed mode of an E1
port in the receive/transmit direction.
Fractional E1 Supports the CES services at 64 kbit/s level.
ATM/IMA Number of supported IMA
groups
/supported ATM TC services
16
Maximum number of E1 links
in each IMA group
16
Dynamically adds or deletes the IMA group members.
ATN 950B Multi-service Access Equipment
Hardware Description 5 Physical Interface Card
Issue 03 (2012-07-23) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
68