484 4xx Client error RFC 3261
SIP 484 Address Incomplete
The Request-URI is incomplete. Used in overlap dialling, or when the number is too short.
Typical Q.850 / ISDN cause: 28 (Invalid number format)
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Common causes
- Number sent before all digits were dialled.
- Missing area or country code.
How to fix it
- Increase the inter-digit timeout or use '#' to send. Normalise numbers to E.164 before sending to the carrier.
Seeing 484 on calls through a router or firewall? Check that SIP ALG is disabled. It causes a surprising number of SIP errors. Read why.
About 4xx responses
The request has a problem or cannot be completed at this server, usually because of something on the requesting side or the target user.