H3C MSR Router Comware 5 Series, Manual

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Figure 164 DFIC-24FXO24FXS front panel
Interface cables and the connection methods
For more information about 24FXS interface cables and the connection methods, see" 24FXS
interface ."
FIC-2BSV/FIC-4BSV
Introduction
The 2-port and 4-port ISDN BRI S/T voice interface modules (FIC-2BSV and FIC-4BSV) can be used
to process ISDN voice traffic. In the upstream direction, it can be connected to user interfaces on an
ISDN switch to receive and decompress, compress and transmit ISDN BRI digital voice traffic. In the
downstream direction, it can be connected to TE devices to allow their voice traffic to be forwarded
through a WAN interface on the router to the Internet, thus implementing VoIP. The interfaces on the
FIC-2BSV/4BSV module are ITU-T I.430-compliant, adopting pseudo-ternary coding, providing 192
Kbps rate, and allowing the maximum transmission distance of 1 km (0.6 miles) in point-to-point
mode.
The FIC-2BSV/FIC-4BSV has these features:
•
The BSV interfaces support two modes: user and network, respectively for connecting an ISDN
network and a TE device.
•
When a BSV interface works in network mode, traffic is processed as follows: The digital voice
traffic received on the BSV interface is compressed and forwarded through the CPU on the
main control board to a WAN interface. The IP voice traffic received on a WAN interface is
forwarded through the CPU on the main control board to the FIC-2BSV/FIC-4BSV, where the
traffic is decompressed and sent to the TE device.
•
When a BSV interface works in user mode, traffic is processed as follows: The digital voice
traffic received from the B channels on the BSV interface is decompressed and forwarded
through the CPU on the main control board to a local FXS or FXO analog voice interface. The
voice signals received on the local FXS or FXO analog voice interface are processed by VoIP
and forwarded through the CPU on the main control board to the FIC-2BSV/FIC-4BSV, where
the traffic is compressed and sent out of the BSV interface to the ISDN switch.
•
In conjunction with FXS or FXO analog voice interface modules, the module provides flexibility
in voice call routing.
•
The signaling on the ISDN BRI D channel is processed separately by CPU.
•
The BSV interfaces support remote power supply and can be connected to ISDN phones
directly.