McDewey

After this, reset the gateway and the fax calls start to work. 12. Final Stages of Resolution If the previous troubleshooting steps did not resolve the fax relay issue, the problem possibly requires more advanced troubleshooting. These are additional steps to try before you open a case with the Cisco Technical Assistance Center (TAC): Learn the brands and models of the fax machines that fail, and investigate those brands and models for known issues. Sometimes there are CARE cases or bugs that address problems for a certain brand of fax machine. For example, a search on Bug Search Tool (registered customers only) for a Pitney Bowes fax shows a bug with Pitney Bowes fax machines and Cisco fax relay (Cisco bug ID CSCdu78373 (registered customers only) ). This bug is not in the Cisco IOS Software but is an incompatibility with Pitney Bowes' proprietary fax signaling protocol when the fax devices on each side of a connection are Pitney Bowes 9920s or 9930s. The workaround is to disable the proprietary protocol on the fax machines or to disable fax relay and use a higher bandwidth codec. Known Caveats Known caveats are unexpected behaviors or defects in the software releases for a product. This table contains information on known problems for fax support on Cisco voice gateways. If you have a CCO account, you can search for known problems on the Cisco bug tracker system tool, called Bug Search Tool. To access Bug Search Tool, do one of these tasks: Enter https://bst.cloudapps.cisco.com/bugsearch/ in your web browser. ○ Table 1 Known Caveats Bug ID Summary Explanation VAD introduces severe When Cisco voice gateways are configured for fax pass- CSCdu30250 •