Line Signaling; Register Signaling - Nortel R2MFC Installation And Configuration Manual

Media bay module

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Line signaling

Line signaling (for example, seize, answer, and disconnect) are implemented by R2 Channel

Associated Signaling known as ABCD bits. Only the two bits AB are used for line signaling. The

state (value) of the bits indicate the signal.

The channels are always bidirectional, (that is, they accept incoming calls or originate outgoing

calls). The channel behavior also supports one-way trunks. The direction of the signal does not

need to be configured. Because the R2MFC MBM is passive, the R2MFC MBM does not initiate

calls; it only passes call origination attempts from one side to the other. The R2MFC MBM

assumes that the two sides (BCM and CO) respect the direction of the trunk as agreed between

them.

The meaning of the bit states are part of the country-specific parameters; however, they can be

customized through the CLI by using commands in the R2 directory.

The following are additional options included in country-specific parameters:

•

use backward force-release signal to clear back (yes/no)

•

release-guard state (timer) when clearing back (timer value)

•

optional CD bits value (usually ignored)

MFC-R2. Physically, there are 15 forward signals and 15 backward signals. The standard defines

two stages of the signaling. The meaning of the signal depends on the stage and the direction of the

call. In total, there are four tables of 15 signals each. See

settings and definitions," on page 91

The meaning of MFC signals can be different when transmitted or received. MFC signal tables are

part of the country-specific parameters. The meaning of the MFC signals in the R2MFC MBM are

configurable through the CLI by using commands in the MFC directory.

The following are other options included in country-specific parameters:

Chapter 5 Configuring the R2MFC MBM

for MFC country-specific signal tables.

R2MFC Media Bay Module Installation and Configuration Guide

Appendix A, "Configuring DIP switch

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