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NDA-30115 Revision 1.0 Page 27
Property Management System - Communication Interface Message Descriptions
Room Recovery (Model 60)
These messages are used by the PMS to update the database in the Model 60
version. These messages will usually only be sent if requested by the NEAX using
the Nop Test Recover Answer message. However, the PMS may, if necessary,
initiate a recovery with a direct request from the NEAX.
Before any recovery messages can be sent, the PMS must first send a Recovery
Start Report message. After all information about rooms has been sent by recovery
messages, a Recovery End Report message must be sent. Both of these messages
are defined in the Data Link Maintenance section.
The recovery messages are grouped into three sets of four messages. Within each
set of four messages, the format of the messages is identical, except for the
Function Codes, which specify the message. Each set of messages contains more
fields (and can therefore convey more information) than the preceding set.
Each set of four messages is composed of two pairs of messages. The PMS must
use the same set of recovery messages during the recovery period. The first pair of
messages is used when the PMS, in normal operation (i.e. not error recovery),
needs to update the information on a given extension. The second pair of messages
is used during recovery. This pair will only be used in response to the NEAX
sending a Nop Test Recover Answer or Recovery Request message.
The first message (of either pair) is used by the PMS as an update/ request for
information on an extension. If a field contains a valid entry, the NEAX database
is updated; if the field is entirely filled with NULL (00H) characters, it is a request
for the NEAX to send the value from the NEAX database. The second message is
the response from the NEAX to the PMS.
• Room Image Set 1 -- Contains the following fields: Extension, Vacancy, MWL
and Restriction Level.
• Room Image Set 2 -- In addition to the above fields, the following are added:
Room Stay, Reserve, Language, Cleaning Status and Wake Up.
• Room Image Set 3 -- In addition to the above fields, Group Number and Group
Announcement are added.