406
SIP
406 Not Acceptable
The resource identified by the request is only capable of generating responses with content characteristics not acceptable according to the Accept header.
Quando você vê este código
When content negotiation fails — the server cannot produce a response matching the Accept header fields in the request.
Como corrigir
Review the Accept headers in your request and broaden the acceptable content types.
Especificação
Comparar com
Guias
401 Unauthorized vs 403 Forbidden: When to Use Each
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Protocol Deep Dives
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Protocol Deep Dives
Cenários de depuração
Glossário
Status Code
Request Method (HTTP Verb)
TLS Handshake
Authentication
TCP/IP
Port Number
NAT (Network Address Translation)
Socket
Request-Response Model
RFC (Request for Comments)
Connection-Oriented
Full-Duplex
SRV Record
SIP Dialog
Signaling
SIP Registrar
STUN (Session Traversal Utilities for NAT)
TURN (Traversal Using Relays around NAT)
SDP (Session Description Protocol)
SIP INVITE
SIP Proxy Server
SIP Redirect Server
SIP Transaction
SIP User Agent
SIP Trunk
RTP (Real-time Transport Protocol)
SRTP (Secure Real-time Transport Protocol)
SIP ACK
SIP BYE
SIP CANCEL
SIP OPTIONS
SIP SUBSCRIBE/NOTIFY
B2BUA (Back-to-Back User Agent)
SBC (Session Border Controller)
Codec Negotiation
SIP Response Classes
VoIP (Voice over IP)
Presence (SIP)
PBX (Private Branch Exchange)
MFA (Multi-Factor Authentication)
TLS Versions