2.2.3 Callback Configuration Option
The following message syntax specifies the format for the Callback configuration options.
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Callback Type |
Length |
Callback Delay (optional) |
Callback Address (variable) |
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Callback Type (1 byte): This MUST be set according to the values mentioned in the table.
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Callback configuration option
Callback type
Description
No callback
0x01
The caller requests not to be called back.
Callback to a user-specified number
0x02
The caller requests to be called at the specified address.
Callback to a pre-specified number
0x03
The caller will be called at a pre-specified address. This specifies only the callback type. The actual address to be used for callback is specific to the administrative configuration and is outside the scope of this protocol.
Length (1 byte): This MUST specify the length of the Callback Configuration option including the Callback Type, Length, and the data portion associated with the callback configuration specified in this section.
Callback Delay (1 byte): This specifies the amount of time, in seconds, the answerer MUST wait before calling the caller back.
Callback Address (variable): This MUST specify the Callback Address for the Callback Configuration option, as specified in section 2.2.2.