Found this random issue at few customer sites.
Customer is complaining of no audio after answering the phone.
This is a random issue observed on SPA504G phone with firmware 7.5.4 and 7.4.7
From what I can see in the traces phone is sending 200 OK, received an ACK then will send a BYE without RTP been sent
Is this a known issue ? I couldn't find anything regarding this but this affect few of our customers
