The value is a sum of values (powers of two), where each value in the sum represents a character (or characters) that is (are) used as a data forwarding character. The data forwarding characters are used to instruct the PAD to complete the assembly of and to forward a packet containing the data accumulated up to the reception of such a character. The values that may be included in the sum and their meanings are: 0 Data forwarding characters are not used 1 Alpha-numeric characters (A to Z, a to z, 0 to 9, inclusive) 2 Character CR 4 Characters ESC, BEL, ENQ, ACK 8 Characters DEL, CAN, DC2 16 Characters EOT, ETX 32 Characters HT, LF, VT, FF 64 All the other characters in colums 0 and 1 of IA5 and not listed above.