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[1]: §7.2 The SIP response codes are consistent with the HTTP response codes, although not all HTTP response codes are valid in SIP. [1]: §21 SIP responses also specify a "reason phrase", and a default reason phrase is defined with each response code.
450 Blocked by Windows Parental Controls (Microsoft) The Microsoft extension code indicated when Windows Parental Controls are turned on and are blocking access to the requested webpage. [36] 498 Invalid Token (Esri) Returned by ArcGIS for Server. Code 498 indicates an expired or otherwise invalid token. [37] 499 Token Required (Esri)
4xx: The request cannot be completed at the server for a variety of reasons, including bad request syntax (code 400). 5xx: The server failed to fulfill an apparently valid request, including server internal errors (code 500). 6xx: The request cannot be fulfilled at any server. It indicates a global failure, including call rejection by the ...
instructs a SIP client to use the NAPTR and SRV schemes to look up the SIP server associated with the DNS name voip-provider.example.net and connect to that server. If those records are not found, but the name is associated with an IP address, the client will directly contact the SIP server at that IP address on port 5060, by default using the ...
This is a list of Simple Mail Transfer Protocol (SMTP) response status codes. Status codes are issued by a server in response to a client's request made to the server. Unless otherwise stated, all status codes described here is part of the current SMTP standard, RFC 5321. The message phrases shown are typical, but any human-readable alternative ...
The ICMP header starts after the IPv4 header and is identified by its protocol number, 1. [6] All ICMP packets have an eight-byte header and variable-sized data section. The first four bytes of the header have fixed format, while the last four bytes depend on the type and code of the ICMP packet.
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These two extensions allow users to specify their preferences about the service the IMS provides. With the caller preferences extension, [8] the calling party is able to indicate the kind of user agent they want to reach (e.g. whether it is fixed or mobile, a voicemail or a human, personal or for business, which services it is capable to provide, or which methods it supports) and how to search ...