Transpac

Trames de supervision:

RR (Receive Ready) 00

REJ (Reject) 01

RNR (Receiver Not Ready) 10

SREJ (Selective Reject) 11

Trames sans numéro:

SNRM (Set Normal Response Mode)

SARM (Set Autonomous Response Mode)

UA (Unnumbered Acknoledge)

DISC (Disconnect)

CMDR (Command Reject)