2.2.1.4.1 AccelBW

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When used in a request, this token specifies a transmission rate, in bits per second, that the client requests the server to use when transmitting the amount of multimedia data that is specified by the AccelDuration (section 2.2.1.4.2) token.

When used in a response, this token specifies the transmission rate, in bits per second, that the server intends to use when transmitting the amount of multimedia data that is specified by the AccelDuration token of the server.

The AccelBW token is defined only for servers that have a version greater than or equal to 5.0 (as specified by the server in the Server header) and only for clients that have a version greater than or equal to 8.0 (as specified by the client in the User-Agent header).<17>

The value MUST be an integer in the range from 0 through 4,294,967,295. If the value is 0, then the token is ignored.

The syntax of the AccelBW token is defined as follows.

 AccelBW         = "AccelBW=" 1*10DIGIT

Although not required, the AccelBW, AccelDuration, and LinkBW tokens are typically grouped together as shown in the following example.

Example:

 Pragma: LinkBW=2147483647, AccelBW=1048576, AccelDuration=5000