5.31 Calling-Station-Id

5.31. Calling-Station-Id

Description

  This Attribute allows the NAS to send in the Access-Request packet
  the phone number that the call came from, using Automatic Number
  Identification (ANI) or similar technology.  It is only used in
  Access-Request packets.

A summary of the Calling-Station-Id Attribute format is shown below. The fields are transmitted from left to right.

0                   1                   2
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- | Type | Length | String ... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-

Type

  31 for Calling-Station-Id.

Length

  >= 3

String

  The String field is one or more octets, containing the phone
  number that the user placed the call from.

  The actual format of the information is site or application
  specific.  UTF-8 encoded 10646 [7] characters are recommended, but
  a robust implementation SHOULD support the field as
  undistinguished octets.

  The codification of the range of allowed usage of this field is
  outside the scope of this specification.