Section: Annex A (informative): Example of subaddress information element coding
Content: This annex gives an example of how the Called Party Subaddress IE is encoded to carry subaddress digits that use IA5 characters. This example is also applicable to the Calling Party Subaddress IE. NOTE 1: The value of this bit has no significance when the type of subaddress is "NSAP". NOTE 2: These bits are spare. NOTE 3: The Authority and Format Identifier code 50 (in BCD) indicates that the subaddress consists of IA5 characters (see ISO standard 8348 AD2). NOTE 4: IA5 character as defined in ITU-T Recommendation T.50 [52]/ISO 646 and then encoded into two semi-octets according to the "preferred binary encoding" defined in X.213 [144]/ISO 8348 AD2. (Each character is converted into a number in the range 32 to 127 using the ISO 646 encoding with zero parity and the parity bit in the most significant position. This number is then reduced by 32 to give a new number in the range 0 to 95. The new number is then treated as a pair of decimal digits with the value of each digit being encoded in a semi-octet.) NOTE 5: the number of IA5 characters in the subaddress may vary, subject to an upper limit of 19 IA5 characters.