DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-1281PMS-LINK (Property Management System Link)
9
PMS-LINK (Property Management System Link)
Property Management System (PMS) is a stand-alone computer system that
environments such as hotels or hospitals use for services such as reservations,
registration, messaging, housek eeping, night aud it, billing, and inv entory. The
PMS Link provides a communications c hannel between the switch and the
customer-owned PMS so that the PMS can interrogate the system for information
related to the following features:
■Message Waiting Notification
■Controlled Restriction
■Housekeeping Status
■Check-in/Check-out
■Room Change/Room Swap
Refer to

DEFINITY Communications System Generic 3 Feature Description,

555-230-204, for details of the PMS feature. The PMS device connects to the
system via a data module (PDM, MPDM, DTDM) connected to a por t on a TN754
Digital Line circuit p ack which is administered as a data extension. A PMS device
can also be connec ted through an ADU to a por t on TN726B. The PMS link to the
processor is via a system por t. A system port is comp rised of a port on the
TN726B Data Line circuit pack and a port on the TN553 Packet Data circ uit pack
connected to eac h other in a null-modem fashion. Refer to the PDATA-PT section
for information on the system port co nnectivity.
PMS Link maintenance provides a strategy for ma intaining the link between the
switch and a PMS device. The strateg y includes a set of tests for p eriodic
diagnosis, detec tion of errors during normal op eration, actions for
troubleshooting, and raising alarms for serious problems. PMS Link Maintenanc e
uses a ‘‘try-and-wait’’ mechanism for maintaining the PMS Link. If a PMS Link is
torn down due to an error, PMS Link Maintenance attemp ts to bring up the link
immediately. If the Link Setup fails, PMS Link Maintenance will wait for five
minutes before the next retry. If the number of retries reaches a threshold (12), a
Minor alarm is raised for service attenti on.
PMS Link Maintenance does not cover the maintenanc e of the elements
composing the PMS physical li nk (the external PMS device, Data Module
(PDM/MPDM/DTDM), Digital Line Port of a TN754 Digital Line circuit pack, ADU,
or Data Line Port of TN726B Data Line circuit pac k). If PMS Link Maintenance
MO Name (in
Alarm Log) Alarm Level Initial Command to
Run Full Name of MO
PMS-LINK MINOR test p ms l PMS Link
PMS-LINK WARNING test p ms PMS Link