Phone-Delta Configuration Option Details

The Phone-Delta option is used to give its peer the information needed to make a call. Because it is difficult to determine which dialing prefixes (if any) are necessary to dial a given phone number (national destination code/country code) and in what combination, the dialed phone number is based on a previously known number.

Type 

A one-octet field, in hexadecimal code, that indicates the type of this BAP Datagram option. For Phone-Delta this value is 02. 

Length 

A one-octet field, in hexadecimal code, that indicates the length of this BAP option including the type, length, and suboption fields. 

Sub-Option Type 

The following Sub-Option types are defined for this option:
01 Unique-Digits
02 Subscriber-Number
03 Phone-Number-Sub-Address 

Sub-Option Length 

A one-octet field that that indicates the length of this BAP suboption, including the suboption type, suboption length, and suboption fields. 

Sub-Option 

Unique-Digits is a one octet field containing the count of the rightmost digits of the subscriber number that are different from the set of the phone numbers of the ports used in this mulitilink connection.
Subscriber-Number is the phone number of the port to be called by the peer.
Phone-Number-Sub-Address is the subaddress of the port to be called by the peer.