Specifications

Chapter 7 Configuring the Eight-Port FXS RJ-21 Module
Eight-Port RJ-21 FXS Module User Interface Conventions
7-2
Catalyst 4224 Access Gateway Switch Software Configuration Guide
OL-2031-02
Eight-Port RJ-21 FXS Module User Interface
Conventions
The eight-port Foreign Exchange Station (FXS) module is similar to the two-port
FXS analog interface card (VIC-2FXS). Because the eight-port FXS module is
located in slot 4, the eight ports are numbered 4/0 to 4/7. The front panel of this
module has two rows of four LEDs each. The LEDs numbered 0 through 3 on the
left side represent ports 4/0 through 4/3, and the LEDs numbered 4 through 7 on
the right side represent ports 4/4 through 4/7.
Configuring FXS Voice Ports
The default values for FXS voice ports are usually adequate but this section
includes information on changing the defaults if necessary. This section describes
the following procedures:
• Changing Default Configurations, page 7-2
• Validating the Configuration, page 7-4
• Troubleshooting the Configuration, page 7-5
Changing Default Configurations
To configure FXS voice ports, use the following commands in privileged EXEC
mode:
Command Purpose
configure terminal
Enters global configuration mode.
voice-port slot-number/port
Identifies the voice slot and port number you want to
configure, and entesr voice port configuration mode.
signal {loop-start | ground-start}
Selects the appropriate signal type for this interface.