A 484 seen on a trunk configured for overlap dialling is expected signalling for a partial number, whereas a 484 on an en-bloc trunk indicates the sender truncated or malformed the dialled number.
inferred · Checked 2026-10-02
- Vendor
- not restricted
- Product
- not restricted
- Subsystem
- Diagnosis
- Deployment
- any
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Status
- inferred
- Checked
- 2026-10-02
Sources
- RFC 3578: Mapping of Integrated Services Digital Network (ISDN) User Part (ISUP) Overlap Signalling to the Session Initiation Protocol (SIP) — RFC Editor / IETF · tier 1 standards and regulators · Sections 2 and 3.3, read together
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting SIP 404 Not Found and 484 Address Incomplete call failures: source note sip-404-484-troubleshooting-484-on-overlap-normal. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-404-484-troubleshooting-484-on-overlap-normal
BibTeX
@misc{warmtransfer-claim-sip-404-484-troubleshooting-484-on-overlap-normal,
title = {Troubleshooting SIP 404 Not Found and 484 Address Incomplete call failures: source note sip-404-484-troubleshooting-484-on-overlap-normal},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-404-484-troubleshooting-484-on-overlap-normal},
note = {Source note sip-404-484-troubleshooting-484-on-overlap-normal, checked 2026-10-02}
}