200 2xx Success RFC 3261
SIP 200 OK
The request succeeded. For INVITE, the call was answered. For REGISTER, the registration was accepted.
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Common causes
- Normal success.
How to fix it
- If calls connect but drop after about 30 seconds, the ACK for this 200 OK is not reaching the far end. This is almost always NAT or a wrong Contact or Record-Route header. Fix NAT handling or disable SIP ALG on the router.
Seeing 200 on calls through a router or firewall? Check that SIP ALG is disabled. It causes a surprising number of SIP errors. Read why.
About 2xx responses
The request succeeded.