46Chapter 5 Configuring the R2MFC MBM
MFCR2 side (External Link) configurable parameters
Physical line characteristics
The MBM has two options for physical connections on the faceplate:
1
2a pair of BNC connectors for coax cables (line impedance of 75 Ohms)
The BNC connectors can have one of the following:
•TX shielding connected to ground (default)
•RX and TX shielding not connected to ground
Only one of the two connector types can be active. The default active interface is the BNC connector. The BCN connector is part of the
The active interface can be customized in the firmware through the CLI by using commands in the COnfig directory.
E1 framing
The external link uses Channel Associated Signaling on timeslot 16, therefore; TS16 multiframe format is always used. In addition, optional CRC4 multiframe can be used (for monitoring digital transmission quality), instead of basic “alternate frame” format.
The CRC4 multiframe option is activated by the firmware as part of the
PCM coding is
These settings can be customized in the firmware through the CLI by using commands in the ALarm directory.
Note: Changes made to the framing parameters must be configured in both the R2MFC MBM and the BCM.