Asterisk Call Failed – 488 Not Acceptable Here. How to fix 488
Problem Description: When the user makes call by the SIP trunk with his Cloud PBX, the call failed.
AnalysisThee PCAP log shows the provider returned the error response – 488 Not Acceptable Here.
The SDP in the INVITE of Cloud PBX sent indicated that it used SRTP.See the a=crypto:1 AES_CM_128………..
Solution: Disable the SRTP option in the SIP trunk settings.
Or change the current system to support codecs G711u, G711a