3Com MSR 50, MSR 30, MSR 20 manual FIC-2BSV/FIC-4BSV, Optical Fiber

FIC-2BSV/FIC-4BSV Module 221

LC: square fiber-optic connector

MT-RJ: square fiber-optic transceiver connector

Connecting the Interface Step 1: Insert the SFP card into its corresponding slot.

Optical Fiber

Step 2: Locate the Rx and Tx fiber-optic interfaces on the interface card. Use two

fibers to connect the FIC-CPOS to another device: Rx to Tx and Tx to Rx.

Step 3: Power on the device and read the state of the LINK LED for the CPOS

interface: ON means the Rx link is present and OFF means the opposite. In the latter case, check the line status.

w WARNING: Because invisible laser radiation may be emitted from the aperture of an optical port when no fiber is connected or the dust cap is removed, do not stare into the open aperture.

Replace the dust cap when no fiber is connected to the optical port.

FIC-2BSV/FIC-4BSV

Module

Introduction The 2-port and 4-port ISDN BRI S/T voice interface cards (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 card 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:

■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 card provides flexibility in voice call routing.