Source note · Troubleshooting calls that drop on hold or transfer
488 (Not Acceptable Here) means the responding party could not accept the media offered; a Warning header may accompany it to explain why.
Checked 2026-09-30
- Vendor
- IETF
- Product
- SIP
- Subsystem
- sip-response-codes
- Deployment
- any
- Region
- not restricted
- Release range
- RFC as published
- Checked
- 2026-09-30
Sources
- RFC 3261 — SIP: Session Initiation Protocol — IETF / RFC Editor · tier 1 standards and regulators · Section 21.4.26 (488 Not Acceptable Here)
Cite this note
APA
WarmTransfer. (2026, September 30). Troubleshooting calls that drop on hold or transfer: source note sip-reinvite-call-drops-488-meaning. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-reinvite-call-drops-488-meaning
BibTeX
@misc{warmtransfer-claim-sip-reinvite-call-drops-488-meaning,
title = {Troubleshooting calls that drop on hold or transfer: source note sip-reinvite-call-drops-488-meaning},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-reinvite-call-drops-488-meaning},
note = {Source note sip-reinvite-call-drops-488-meaning, checked 2026-09-30}
}