H3C Technologies H3C MSR 50 - Manual (Page 272)

4-77
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 mi.) in point-to-point mode.
The FIC-2BSV/FIC-4BSV has these features:
z
The BSV interfaces support two modes: user and network, respectively for connecting an ISDN
network and a TE device.
z
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.
z
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.
z
In conjunction with FXS or FXO analog voice interface modules, the module provides flexibility in
voice call routing.
z
The signaling on the ISDN BRI D channel is processed separately by CPU.
z
The BSV interfaces support remote power supply and can be connected to ISDN phones directly.
z
The FIC-2BSV/FIC-4BSV is dedicated to voice applications, which is different from the BS
interface modules where BRI data applications are supported.
Interface attributes
The following table describes the interface attributes of the FIC-2BSV/FIC-4BSV.
Table 4-63 Interface attributes of the FIC-2BSV/FIC-4BSV
Attribute FIC-2BSV FIC-4BSV
Connector RJ-45
Number of connectors 2 4
Interface standard ITU-T I.430, Q.921, Q.931
Interface rate 192 Kbps
Cable ISDN S interface cable
Supported service Voice access over ISDN S interface cable