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Chapter 6 R2MFC MBM maintenance
During call setup, the following information is passed between the BCM and the CO:
1
Dialed digits — Dialed digits are passed without any change. Up to 24 digits can be dialed.
The MFC trunk is capable of repeating dialed digits on outgoing calls to the CO, when
requested according to protocol.
Digits are passed immediately to BCM as they are received (PRI overlap mode) on incoming
calls from CO to BCM. This causes the BCM to determine end of dialing, and to immediately
signal call completion.
2
Calling number — (in PRI: CLID; in MFC: ANI) This number is passed without any change,
and can be up to 16 digits long.
3
Termination status — Termination status is translated as presented in the
shows both directions. When translating a signal, only the bold value is used.
Table 9 Translation of Subscriber Status
Subscriber State
Free (ringing)
Busy
Unallocated number
Network congestion
or general failure
Line out of order
Number changed
1 MFC signal is indicated by meaning. Actual signal depends on country; ITU/T standard is indicated in parentheses.
Other protocol-specific fields are not translated from side to side. They are handled as described
Table 9
in the protocols implementation.
Clock synchronization
By default, the R2MFC MBM synchronizes on the external E1 line, and transmits this clock on the
internal link to the BCM. By doing so, the BCM can synchronize on the external link.
Slips may occur between the BCM and the R2MFC MBM, if the BCM needs to synchronize on
another digital trunk MBM. To avoid slips, there is an option for the R2MFC MBM to synchronize
on the internal link to the BCM, instead of the external E1 line. Synchronization settings can be set
up by using the CLI. See
available through the CLI.
NN40010-300
PRI Signal
ALERTING
Cause 17
Cause 1
Cause 42
All other values
Cause 27
Cause 22
Chapter 7, "Command Line Interface (CLI)," on page 73
Table
9. The table
MFC Signal
1
BW_FreeCharge (B6)
BW_FreeNoChrg (B7)
BW_Busy (B3)
BW_Unlocated (B5)
BW_B_Congest (B4)
Unknown signal
BW_OutOfOrder (B8)
BW_ChangOrder (B2)
for commands
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