The purpose of
this Recommendation is:
a) to standardize the procedures for
subscribers of a public data network (PDN) calling ship earth stations in the
Maritime Satellite Data Transmission Service;
b) to standardize the procedures for
calling subscribers of a PDN from ship earth stations using the packet switched
data transmission service defined in Recommendations X.25 and X.352;
c) to standardize the procedures for
calling subscribers of a PDN from ship earth stations by accessing packet
assembly/disassembly facilities (PAD) as defined in Recommendation X.351.
This
Recommendation does not cover data calls passed through the international
public switched telephone network other than those which are accessed through
PADs designed in accordance with Recommendation X.351.