Call User Data

Specifies the pattern of digits Solstice X.25 uses to match the Call User Data on incoming calls for IP. X.25 software uses the first 2 digits of the call user data (CUD) field to distinguish between PAD and IP calls. The CUD field of a PAD call always begins with 01. The CUD field of an IP call always begins CC. If you want to add any further CUD to be used in outgoing PAD calls, make sure you append it to the 01. Do not delete the 01--if you do, the X.25 software receiving the call will not know which application to pass it to and the call will fail.

The options are:

• Starts with: Solstice X.25 accepts calls from callers that have CUD fields that have leading digits that match the string of hexadeciaml digits you enter here. The default of "Starts with" CC is the standard Call User Data value for IP over X.25 as specified in RFC 877.

• Matches: Solstice X.25 accepts calls from callers that have CUD fields that exactly match the string of hexadeciaml digits you enter here.

• Don't care: Solstice X.25 accepts calls from any caller, regardless of its CUD field.

If you choose Starts with or Matches, enter a string of hexadecimal digits to be matched.