Cisco Cisco 2600 3600 Series High-Density Analog Voice Fax Network Module Merkblatt

Introduction
 Prerequisites
      Requirements
      Components Used
      Conventions
 Configure
      Configurations
 Verify
 Troubleshoot
      Troubleshooting Procedure
      Troubleshooting Commands
 Related Information

This document explains the configurations necessary to implement T1 channel associated signaling (CAS).

Ensure that you meet these requirements before you attempt this configuration:

This document is based on Understanding How Digital T1 CAS (Robbed Bit Signaling) Works in IOS
Gateways. Read this document to understand the various types of CAS signaling methods. This document also
serves as a guide for configuring the different types of CAS signaling.

Before you implement E1 R2 signaling in a Cisco AS5300 router, check to ensure that your version of Cisco
IOS® Software is compatible with the Cisco VCWare in the E1 module. If the versions are incompatible, the
digital signal processor (DSP) modules in the voice card will not load and voice signal processing will not
occur. See the Cisco VCWare Compatibility Matrix for the Cisco AS5300 to ensure that your versions are
compatible.

Typically, if the version of Cisco VCWare is not compatible with the Cisco IOS Software, you can see this by
entering the show vfc slot_number interface command as shown here:

5300#show vfc 1 interface

Rx: in ptr 18, outptr 0

Tx: in ptr 14  outptr  14

0 in hw queue, 0 queue head , 0 queue tail

Hardware is VFC out−of−band channel

Interface : state RESET DSP instance (0x61048284)

dsp_number 0, Channel ID 0

TX outstanding 0, max TX outstanding 0

Received 18 packets, 1087 bytes, 0 giant packets

0 drops, 0 no buffers, 0 input errors