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 character2 Echo3 Selection of data forwarding character4 Selection of idle timer delay5 Ancillary device control6 Control of PAD service signals7 Operation on receipt of break signal8 Discard output9 Padding after carriage return10 Line folding11 DTE speed12 Flow control of the PAD13 Linefeed insertion after carriage return14 Padding after linefeed15 Editing16 Character delete17 Line delete18 Line display19 Editing PAD service signals20 Echo mask21 Parity treatment22 Page wait