I understand what you are saying. I share your helplessness. But search throughout this forum and you'll see the same "theme" or response: If you load SIP in your 79XX phones, you are on your own.
This is why I'm re-directing you to other website which has seen documented successes in configuring 79XX in SIP without Cisco CallManagers.
FYI: I've got several 79XX phones (including a 7971) which are running SIP and using an Asterisk/FreePBX (hosted in a Raspberry Pi) WORKING at home. I got my setup working just by patiently going through www.voip-info.org.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
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clear text, these texts can be gibberish unless you understand fully
what they mean. This document attempts to br...
Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
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CUCM Database Replication is an area in which Cisco customers and
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