Avaya Configuring WAN Line Services Manuel d'utilisateur télécharger pdf (Page 105)

Configuring E1 and T1 Services

117345-B Rev. 00

6-3

See Chapter 2 for information about editing synchronous line parameters by

clicking on Sync Details in the T1 Line Entry window.

Enabling or Disabling T1 Services

The router enables T1 line services when you add the circuit. You can enable or

disable this interface without moving the cables.

See the Enable parameter on page A-74

for information.

Setting the T1 Frame Type

T1 framing digitizes analog signals to a digital signal, level zero (DS0) with 8-bit

words. T1 uses two types of frame formats:

• D4 Format

• ESF Format

The frame format of the interface should match the frame format required by the

associated T1 equipment.

D4 Format

The D4 format, or superframe format (SF), is the original T1 frame format. A D4

frame comprises:

• One framing bit.

• A DS0 timeslot for each channel on the line. A DS0 timeslot is an 8-bit

sample from a channel.

A T1 line generates 8000 D4 frames per second.

ESF Format

The D4 format (SF) does not allow testing of a digital line while the line is in use.

To allow such testing, you can use the extended superframe format (ESF).

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Avaya Configuring WAN Line Services Manuel d'utilisateur Page 105