SIP 488 Not Acceptable Here
AsteriskRFC 3261 §21.4.26The destination accepted the request but cannot honour the SDP offer. The classic codec-mismatch error: the offered codecs don't intersect the callee's allow-list.
Common causes on Asterisk
- Codec mismatch (e.g. caller G.722 only, callee G.711 only)
- Transcoder offline or not configured
- SRTP required by one side but TLS/SIPS missing
- Wrong RTP IP/port from a NAT-broken UA
Asterisk-specific note
On Asterisk PJSIP, check `allow=` on the endpoint and any `codec_pref` in `pjsip.conf`. Also confirm `disallow=all` precedes `allow=` lines so the codec set is what you think it is.
Stop guessing — paste your trace
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