Cisco IOS Voice Troubleshooting and Monitoring -- Digital Voice Interface Hardware Troubleshooting

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Digital voice interface hardware connects a router or access server to a line from a circuit-switched telephony device in a PBX or the public switched telephone network (PSTN).  
Digital voice interface hardware connects a router or access server to a line from a circuit-switched telephony device in a PBX or the public switched telephone network (PSTN).  

Latest revision as of 17:03, 16 October 2012

Digital voice interface hardware connects a router or access server to a line from a circuit-switched telephony device in a PBX or the public switched telephone network (PSTN).

Guide Contents
Troubleshooting Cisco IOS Voice Overview
Debug Command Output on Cisco IOS Voice Gateways
Filtering Troubleshooting Output
Cisco VoIP Internal Error Codes
Troubleshooting Cisco IOS Voice Telephony
Troubleshooting Cisco IOS Voice Protocols
Troubleshooting Cisco IOS Telephony Applications
Monitoring the Cisco IOS Voice Network
Cause Codes and Debug Values

Contents

Software Compatibility

To ensure that your card is compatible with your software, check the following:

Cabling

Cabling for the digital ports varies by platform:

T1/E1 Trunk and Digital Voice Port Pinouts (RJ-48)

Figure: RJ-48-to-RJ-48 T1/E1 Cable Wiring shows the RJ-48 connector wiring for the T1/E1 trunk cable and the digital voice port cable; Table: Pinouts for T1/E1 Trunk and Digital Voice Port (RJ-48) lists the pinouts.

Figure: RJ-48-to-RJ-48 T1/E1 Cable Wiring

H11419.jpg

Table: Pinouts for T1/E1 Trunk and Digital Voice Port (RJ-48)
Pin Signal

1

RX (input)

2

RX (input)

3

-

4

TX (output)

5

TX (output)

6

-

7

-

8

-


T1/E1 Trunk and Digital Voice Port Pinouts (RJ-45)

Table: T1 or E1 Port Pinouts (RJ-45)
RJ-45 Pin Description

1

RX tip

2

RX ring

3

RX shield

4

TX tip

5

TX ring

6

TX shield

7

-

8

-

Shutdown Port

If the port is not operational, check to make sure the port is not shut down. Enter the show voice port command with the voice port number that you are troubleshooting, which tells you:

  • If the voice port is up. If it is not, use the no shutdown command to make it active.
  • What parameter values have been set for the voice port, including default values. (these do not appear in the output from the 'show running-config' command.) If these values do not match those of the telephony connection you are making, reconfigure the voice port.

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