Overview

Overview of OCs

OC	Description	From	To
TS	Time Sync	SIHOT	Interface
LA	Link Alive	SIHOT	Interface
LA	Link Alive	Interface	SIHOT
CI	Check In	SIHOT	Interface
CO	Check Out	SIHOT	Interface
CO	Check Out	Interface	SIHOT
PCO	Pre Check Out	SIHOT	Interface
RM	Room Move	SIHOT	Interface
ACK	Acknowledge	SIHOT	Interface
ACK	Acknowledge	Interface	SIHOT
PS	Posting simple	Interface	SIHOT
PE	Posting extended	Interface	SIHOT
PP	Posting payment	Interface	SIHOT
CC	Create Card	SIHOT	Interface
COS	Class of Service	SIHOT	Interface
GI	Guest Information	SIHOT	Interface
GC	Guest Change	SIHOT	Interface
SM	Send Message	Interface	SIHOT
WU	Wake Up Message	SIHOT	Interface
WU	Wake Up Message	Interface	SIHOT
WA	Wake Up Answer	Interface	SIHOT
RST	Room Status	Interface	SIHOT
DR	Document reader	Interface	SIHOT
RS	Restart	Interface	SIHOT
PAR	Payment request	SIHOT	Interface
PAA	Payment answer	Interface	SIHOT
EXMSG	Extended message	SIHOT	Interface
MS	Message status	Interface	SIHOT
TR	Transaction	Interface	SIHOT
RF	Request Forecast	Interface	SIHOT
AUTH	Authentication	SIHOT	Interface
RC	Read Card	Interface	SIHOT
RR	Room Request	Interface	SIHOT
FC	Forecast	SIHOT	Interface
CR	Change reservation	SIHOT	Interface
FSOA	Request of a Statement of Account	Interface	SIHOT
SOA	Statement of Account	SIHOT	Interface
PRECHECKIN	Pre Check In	SIHOT	Interface
KEYDETAIL	Details of the key	Interface	SIHOT
AC	Assign / delete card	SIHOT	Interface

The most common TAGs are defined in a separate document