Technical data

97
x75v42 HDLC/X.75 with V.42bis data compression/Transparent. This protocol is
not used on the server side because x75 automatically detects X.75 with
V.42bis.
v120 HDLC/V.120/Transparent V.120 with V.42bis is possible.
v110 V.110/Transparent/Transparent
mdm Modem with full negotiation/V.42+V.42bis/Transparent.