Specifications

System Software Diagnostics Guide — September 2006 35
6
6.Diagnosing PSTN Protocol Issues
This chapter describes how to check the protocol configuration using the PSTN Diagnostics
(pstndiag) tool.
• Preparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
• Checking the Protocol Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
For more information about the pstndiag tool, refer to Chapter 26, “PSTN Diagnostics Tool
Reference”.
6.1 Preparation
Before you use the pstndiag tool as described in this chapter, refer to the following sections:
• Section 26.2, “Guidelines”, on page 128
• Section 26.3, “Preparing to Run the PSTN Diagnostics Tool”, on page 128
After determining that a network connection exists as described in Chapter 5, “Diagnosing First
Call Issues”, check the protocol configuration. If the protocol is not properly configured, calls will
not be successfully made. To check the protocol configuration, you will make and receive calls on
your system. Protocols are configured on a trunk basis.
The procedure described in this section applies to a system with a loopback test setup or a system
using a network connection setup.
If you can successfully make and receive calls in a system with loopback test setup, you can rule
out any hardware problems. If you then test your system using a network connection setup, and are
unsuccessful in making and receiving calls, you will need to check the board configuration settings.
The configuration settings on the board and the switch should match; for example, the line type, the
line coding, and the signaling protocol.
6.2 Checking the Protocol Configuration
Use the following procedure to check the protocol configuration:
1. If you have not already done so, start the pstndiag tool, as described in Section 26.4.1,
“Starting the PSTN Diagnostics Tool”, on page 128.
The main window displays a tree or hierarchy of the components in your system, including all
boards that have been downloaded in the system, all trunks within a board, and all channels
within a trunk.