RFC 3261 states that the 484 status code allows overlapped dialling, in which a client that does not know the dial string length sends strings of increasing length until it no longer receives 484.
Checked 2026-10-02
- Vendor
- not restricted
- Product
- not restricted
- Subsystem
- SIP response codes
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 3261 as published
- Checked
- 2026-10-02
Sources
- RFC 3261 — SIP: Session Initiation Protocol — IETF / RFC Editor · tier 1 standards and regulators · Section 21.4.22 (484 Address Incomplete)
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-overlap-dialling. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-404-484-troubleshooting-484-overlap-dialling
BibTeX
@misc{warmtransfer-claim-sip-404-484-troubleshooting-484-overlap-dialling,
title = {Troubleshooting SIP 404 Not Found and 484 Address Incomplete call failures: source note sip-404-484-troubleshooting-484-overlap-dialling},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-404-484-troubleshooting-484-overlap-dialling},
note = {Source note sip-404-484-troubleshooting-484-overlap-dialling, checked 2026-10-02}
}