Specifications

Introduction

1-6 MP2100M-LS-2 Modules - Installation and Operation Manual

• Transmission of five synchronous or asynchronous 9.6 kbps channels, in

one main link time slot.

LS-2/M Module

Figure 1-5 shows a typical application for the LS-2/M module.

X.50

Cross-Connect

Switch

12 x 2.4 kbps

(1 Time Slot)

MEGAPLEX System

LS-2

6 x 4.8 kbps

(1 Time Slot)

MEGAPLEX System

LS-2/M

SRM-8

Modems

SRM-8

Modems

Figure 1-5. Typical Application for LS-2/M Modules

The LS-2/M module is a six-channel low-speed data sub-multiplexer with

built-in short range modems that uses a sub-multiplexing technique compatible

with ITU-T Rec. X.50, Division 3, and ITU-T Rec. X.54. Up four modules can

be operated as one group to allow the transmission of twenty 2.4 kbps channels

in one main link time slot. Since the maximum payload carried by a main link

time slot under the ITU-T Rec. X.50 Division 3 multiplexing format is 48 kbps,

the highest rate at which all six channels of one LS-2/M module can be utilized

is 4.8 kbps per channel; a group of two LS-2/M modules can be provide ten

4.8 kbps channels, and four modules can be provide twenty 2.4 kbps channels.

Other combinations of channel numbers and data rates are allowable within the

specified payload, as explained in Section 1.2.

The LS-2/M module provides an integrated solution for tail-end applications

that require providing full-duplex access to the MEGAPLEX link for remotely

located data equipment (LS-2/M modules cannot be operated in a link, they can

only operate in a link with /X.50 modules). The built-in modems are fully

compatible with the SRM-8 short-range modems offered by RAD.