Avaya Configuring TDM Services Manual do Utilizador descarregar pdf (Página 17)

309426-14.10 Rev 01

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Chapter 1

Understanding TDM

Overview of TDM

Time division multiplexing (TDM) is a method in which a transmission device is

multiplexed among a number of channels by allocating the device to the channels

on the basis of timeslots. Timeslots are assigned so that each transmitting device

gets its required share of the available bandwidth. Because of this time-bandwidth

multiplexing technique, TDMs are protocol insensitive and can combine various

protocols onto a single high-speed transmission link.

Some devices, such as voice and video systems, may require more timeslots to

ensure that data arrives at the distant link-end without becoming distorted from

slower data rates.

TDM technologies are available on the Passport 5430 to route TDM data between

the dual synchronous PMC modules and the ATM (asynchronous transfer mode)

super-serial daughterboard.

TDM Circuits

You can establish two different types of TDM circuits:

• A switched H.110 TDM circuit

• A circuit emulation services (CES) H.110 TDM circuit

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Avaya Configuring TDM Services Manual do Utilizador Página 17