Patrick, you can get around the issue about the phones not being able to be challenged on the PUBLISH method by increasing the number of Max_Auth on the phones. I set mine to 255 and now the phones send the PUBLISH method in already authenticated.
I use Telchemy's SQmediator as a SIP PUBLISH collector and to provide additional information that allows me to "drill down" to better understand the data. I'll send you a screenshot. I can't post attachments here.
Regards,
Patrick
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