4000 Router Series Interface Module Guide

Attribute Description

Interface standard

• Supports subscriber circuit interface (FXS), compliant with ITU Q.512

• Supports loop trunk interface (FXO), compliant with ITU Q.552

• Over-current and over-voltage protection compliant with ITU K.20

Cable type Telephone cable with ferrite core

Dial-up mode Supports DTMF, compliant with GB3378, but does not support pulse dial-up.

Bandwidth 300 Hz to 3400 Hz

Interface LEDs

SIC-2FXS1FXO panel is shown in the following figure:

Figure 23 SIC-2FXS1FXO panel

The following table describes the LEDs on the SIC-2FXS1FXO panel:

Table 35 Description for the LEDs on the SIC-2FXS1FXO panel

LED Descri

tion

LINK/ACT

• OFF means the link is idle.

• ON (Green) means the link is being occupied for call connection.

• Flashing (Yellow) means the link is being occupied for communication.

Interface cables and the connection methods

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

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

DSIC-4FXS1FXO

Introduction

4-port analog subscriber circuit interface module and 1-port voice AT0 loop trunk interface module

(DSIC-4FXS1FXO) serve to access and handle five channels of analog voice signals over data

communication networks.

• FXS interfaces are analog subscriber line interfaces that provide ordinary analog telephone and

fax access and also can connect AT0 loop trunks of exchanges;

• FXO interfaces are loop trunk interfaces that provide access of common subscriber lines of

exchanges.

Interface attributes

Table 36 Interface attributes of the DSIC-4FXS1FXO.

Attribute Description

Connector type RJ-11