Avaya BCM 4.0 Networking Guide de configuration télécharger pdf (Page 163)

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Chapter 9 VoIP trunk gateways 163

BCM 4.0 Networking Configuration Guide

• If manual dial must be used, then the user should wait until the call is answered before

starting the fax session.

• If manual dial must be used, then the user should enter the digit 8 before initiating the fax

session. This ensures that the fax session is initiated by CallPilot before the fax machine's

timer is started.

• The call duration can be increased by adding a timed pause to the end of dialing string (for

example: 758-5428,,,,). This allows the call to ring at the destination before the fax

machine call duration timer starts.

• Since the problem is related to the delay in initiating the fax session, the number of rings

for fax mailboxes Call Forward No Answer (CFNA) should be minimized.

Table 40 is a list of restrictions and requirements for the T.38 fax protocol.

Table 40 T.38 restrictions and requirements

Supported Not supported

only UDP transport TCP

only UDP redundancy Forward Error Correction (FEC)

T.38 version 0 Fill removal

on H.323 VoIP trunks between BCMs, between

BCMs and legacy BCMs, or between BCM and

Meridian 1-IPT and CS 1000/M

MMR transcoding

JBIG transcoding

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