X.3

X.3 is an ITU-T standard indicating what functions are to be performed by a Packet Assembler/Disassembler (PAD) when connecting character-mode data terminal equipment (DTE), such as a computer terminal, to a packet switched network such as an X.25 network, and specifying the parameters that control this operation.

The following is list of X.3 parameters associated with a PAD:
 * 1 PAD recall using a character
 * 2 Echo
 * 3 Selection of data forwarding character
 * 4 Selection of idle timer delay
 * 5 Ancillary device control
 * 6 Control of PAD service signals
 * 7 Operation on receipt of break signal
 * 8 Discard output
 * 9 Padding after carriage return
 * 10 Line folding
 * 11 DTE speed
 * 12 Flow control of the PAD
 * 13 Linefeed insertion after carriage return
 * 14 Padding after linefeed
 * 15 Editing
 * 16 Character delete
 * 17 Line delete
 * 18 Line display
 * 19 Editing PAD service signals
 * 20 Echo mask
 * 21 Parity treatment
 * 22 Page wait