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Technical Configuration Guide for: BCM50 to CS2K V2.0 November, 2005

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Nortel Networks External Distribution 11

Please see 4.4

Configuring Voice Network Settings

for information on the GWC packetization

setup.

2.5 ETSI PRI Trunks & Overlap Signaling

There are two types of signaling associated with ISDN PRI: ENBLOC and OVERLAP. Both

pertain to the method in which digits are forwarded, first refers to the method when all digits are

sent at one time and the latter where they are forwarded in multiple messages. Unused in North

America, overlap is quite common in the remainder of the world.

There are a few key points that should be highlighted to ensure simple operation of a BCM

connected to an overlap aware network:

• In general BCMs, who do not support overlap signaling, can interoperate with PRI

overlap signaling provided all digits are contained within the H.323 setup message.

• Future CS2K releases intend to incorporate PRI variant checking to ensure that H.323

trunk groups destined to BCMs will not support overlap signaling.

2.5.1 Problem Identification

The BCM will reject H.225 setup messages that contain the “canOverlapSend” flag set to “True”,

see highlight box inError! Reference source not found.

Figure 3: H.225 Setup Packet Trace

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 39 40

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Avaya BCM50 Guia do Utilizador Página 12