MdTalal

Comments

Please find below the supplier notes "My suggestion would be to check for any settings in the "ZYXEL" router to enable 183/ 180 signaling which might be stated as "Early Media" in some devices as well. Also please refer to the 'ZYXEL' forums as there might be some useful information with regards to this matter."

in How to enable both 180 Ringing & 183 Session in progress signalling? Comment by MdTalal May 29
The Router Models in use are DX-3301-T0, VMG-8623-T50B

in How to enable both 180 Ringing & 183 Session in progress signalling? Comment by MdTalal May 28