A 487 Request Terminated response means the original request was terminated by a BYE or CANCEL, and it is never sent as the response to a CANCEL request itself.

fact · verified 2026-09-04

Vendor
not restricted
Product
not restricted
Subsystem
sip
Deployment
not restricted
Region
not restricted
Release range
not restricted
Status
fact
Confidence
0.95
Verified
2026-09-04

Sources

Cite this claim

APA

WarmTransfer. (2026, September 4). SIP response codes and failure interpretation: claim sip-487-request-terminated. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-487-request-terminated

BibTeX

@misc{warmtransfer-claim-sip-487-request-terminated,
  title  = {SIP response codes and failure interpretation: claim sip-487-request-terminated},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/sip-487-request-terminated},
  note   = {Claim sip-487-request-terminated, verified 2026-09-04}
}

Read this claim in context