"Temporarily Unavailable" when 3-way calling

[sam.poto@troyercheese.com]

(04-27-2018 07:46 AM)Lucia_Yealink Wrote:  I have checked the issue data you provide, but I can only see the CP960 send the invite to the other side, and the other side reply 480 Temporarily Unavailable. What is the phone model of the third party? Is it Yealink phones?

If the CP960 call the third party as the second call, and then build the conference call to add the previous second party as the third call, will the issue happen?
If yes, please provide the Level 6 syslog, config.bin and pace trace of the third party phones, we need to analyze why the phone reply 480.

Please help to check.

BR
Lucia

My SIP/PBX server is a Panasonic NCP1000 and the 3rd party extension I'm calling is a Panasonic KX-NT343 IP phone (not SIP). This also happens when I attempt to call out on our PRI, which leads me to believe it's something to do with how our SIP server/card is setup. I'll see if I can get syslog and trace off our SIP server. Appreciate your help with this.
Sam