Cisco ATA188-I2-A Administration Guide - Page 161
Using prserv for Diagnosing Fax Problems, prserv Overview
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Chapter 7 Configuring and Debugging Fax Services Debugging the Cisco ATA 186/188 Fax Services Table 7-1 Solving Common Fax Problems (continued) Problem Action Fax/modem pass-through method on the remote gateway is not compatible with the Cisco NSE-based method. Some Cisco gateways (such as Cisco VG248, and Cisco 6608) may use signaling messages based on RFC2833 for G.711 upspeed when loaded with older software images. This method is incompatible with the Cisco NSE-based method. You must check to make sure that the image on your gateway supports the Cisco NSE-based fax/modem pass-through. Otherwise, you must configure the Cisco ATA to use fax mode. NSE payload types differ between gateways. The Cisco ATA has a configurable NSE packet payload-type value whose default is 100. This value is compatible with the implementations of most Cisco gateways. However, some Cisco gateways use 101 as the NSE payload type. Ensure that all gateways in your environment use the same NSE payload type if you wish to successfully use fax pass-through mode. Using prserv for Diagnosing Fax Problems This section contains the following topics: • prserv Overview, page 7-9 • Analyzing prserv Output for Fax Sessions, page 7-10 prserv Overview prserv is a tool that runs on a Microsoft Windows-based PC and serves as a log server that captures debug information that the Cisco ATA sends to your PC IP address/port. The debug information is saved into a readable text file. To enable your Cisco ATA to send debug information, you need to set the NPrintf configuration parameter to your PC IP address and an available port, as shown in the following procedure: Procedure Step 1 . is the IP address of your PC. is any unused port (any number from 1024 to 65535) on your PC. Note You can the Nprintf parameter on the Cisco ATA configuration web page or with the TFTP-based configuration method. Step 2 To operate the debug capture program prserv.exe, place the prserv program in a folder on your PC. At the DOS prompt, enter: C:>prserv is the port number you have selected. If is omitted, the default port number is 9001. OL-4804-01 Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator's Guide for H.323 (version 3.0) 7-9