What is TM?

Introduction: This article mainly introduces what is TM , maybe most people have not heard of TM , but I believe that everyone is no stranger to terminal multiplexer, yes, TM is the terminal multiplexer, let us come together Learn about it~~~

1. What is TM - Introduction

The English name of TM is called Termination Multiplexer, which means the terminal multiplexer. It is a device that multiplexes multiple low-speed signals into one high-speed signal, or vice versa, to split one high-speed signal into multiple low-speed signals. The terminal multiplexer TM, the digital cross-connect device DXC, and the add/drop multiplexer ADM are the main network elements of the SDH network.

2. What is TM - the role

SDH main equipment includes: terminal multiplexer (TM), add/drop multiplexer (ADM), synchronous cross-connect equipment SDXC and network management system NMS.

The terminal multiplexer is a device that multiplexes multiple low-speed signals into one high-speed signal, or reversely decomposes one high-speed signal into multiple low-speed signals.

The add/drop multiplexer--- is the most widely used and most feature-rich device in SDH . It has the flexibility to up/down multiplexing the low rate signals in the STM signal through the other end. The ADM also has a time slot switching function that allows interconnection of different VCs between two STM signals and facilitates bandwidth management.

Synchronous Digital Cross-Connect Device (SDXC)--- is a transmission device that combines multiplexing, wiring, protection, monitoring, and network management functions. It can replace the patch panel and cross-connect VC.

3. What is TM - main features

TM supports a full range of PDH tributary interfaces and STM-1 optical and electrical ports. Service delivery with synchronous and asynchronous functions, and an integrated ATM STM-1 user network interface with ATM layer cross-connect capability. The main features of the terminal multiplexer are divided into the following categories:

1) Highly integrated, single board ADM/TM

2) Scalable modular structure

3) Provide FE interface

4) Easy to integrate ATM-based services

5) Support for synchronization status information (SSM)

6) Partial load interface

7) Advanced network and network element management

8) Multiple types of mechanical frames

9) ATM STM-1 UNI optical port with integrated ATM cross-connect function

10) Support broadcast function by using drop and resume

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