Nortel Networks R2MFC ユーザーズマニュアル
Chapter 5 Configuring the R2MFC MBM 47
R2MFC Media Bay Module Installation and Configuration Guide
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.
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.
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.
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)
Register signaling
Register signaling (digits transmission) is implemented by in-band dual-tone signals known as
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
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
for MFC country-specific signal tables.
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.
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: