4000 Router Series Interface Module Guide

Figure 63 MIM-16FXS panel

The following table describes the LEDs on the MIM-16FXS panel.

Table 91 Description for the LEDs on the MIM-16FXS panel

LED Descri

tion

LINK/ACT

• OFF means no link is present.

• Steady green means a link is present and a call connection is being established.

• Flashing yellow means a link is present and there is a call activity.

Interface cables and the connection methods

For more information about FXS interface cables and the connection methods, see

"ADSL/BS/FXS/FXO/AM/FCM interface."

MIM-4BSV Module

Introduction

MIM-4BSV is short for 4-port ISDN BRI S/T voice interface module, which is mainly 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, the module 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 MIM-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. MIM-4BSV has the

following 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 MIM-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 MIM-4BSV module, where the traffic is compressed and sent

out of the BSV interface to the connected ISDN switch.

• Working in conjunction with the FXS or FXO analog voice interface modules, MIM-4BSV provides

flexibility in voice call routing.

• The signaling on the ISDN BRI D channel is processed separately on CPU.