Technical documentation for Phone Proxy

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May 5th, 2010
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We've got a couple of phones connecting to CUCM via Phone Proxy and we're having an issue with accessing the CUCM directory service from the phones.  Can somebody point me to the documentation which details the requirements of setting up the directory service to work thru the ASA?

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William Bell Wed, 05/05/2010 - 22:37
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Here is a link to the config guide.

Based on my understanding, because the ASA requires that URLs leverage HTTPs you need to have a web proxy available to handle the URL requests for XML-based apps from the IP phone (e.g. EM, corporate directory, etc.).

You can configure this as follows:

phone-proxy asa_phone_proxy

proxy-server address interface outside

This aspect of the configuration is documented in bug/defect id: CSCsx08256


Bug Details

Remote Phones can not use services without external proxy server


Phone registered to CUCM via internet using Phone Proxy can not use service key or corporate directory


Phone is registered to CUCM via internet using Phone proxy


Install external proxy server.

Configure Proxy Server address in ASA Phone Proxy

Please refer to ASA Phone Proxy Configuration guide for more detail





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