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Chapter 4 Configuring the R2MFC card 37
R2MFC Card Installation and Configuration Guide
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 card is passive, the R2MFC card does not initiate
calls; it only passes call origination attempts from one side to the other. The R2MFC card assumes
that the two sides (Norstar System 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)
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 Appendix A, “Config DIP switch settings
and definitions,” on page 77 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 card are
configurable through the CLI by using commands in the MFC directory.
The following are other options included in country-specific parameters:
End of dialing (incoming)
End of dialing for an incoming call can be configured by using the CLI. See Table 2, for the end of
dialing options.
Table 2 Minimum (or fixed) number length + timer parameters (Sheet 1 of 2)
Option Parameters Meaning Default
Explicit ‘End of dial’ signal
(I-15)
None The preset option for all
countries. However, signal
has low significance, because
the end of dialing is
determined by the Norstar
System (PRI side) when it
receives the last digit of the
number.
Yes