Property Management System (PMS) Interface
—PMS Link Maximum Retransmissions
Enter the number of times (1 to 5) that the server will retransmit a message in response to a negative acknowledgment, or send an inquiry for an acknowledgment from the PMS for a message before giving up on the message transmission. The recommended setting is 5. Consult the PMS vendor about this setting.
—PMS Link Maximum Retransmission Requests
Enter the number of times (1 to 5) that the switch will request the PMS to retransmit a message. The recommended setting is 5. Consult the PMS vendor about this setting.
—Take Down Link for Lost Messages
Enter y to cause the server to take the PMS link down if a mes- sage is sent and rejected for the number of times specified in the
PMS Link Maximum Retransmissions field. An n in this field causes the server to leave the PMS link up, but the PMS will stop trying to send the message. Careful monitoring of the PMS log is recommended when set to n. The recommended setting is y.
The database swap between the server and the PMS may not be complete if they are out of synchronization. Choosing to disable the link allows the PMS to function with partially correct data. Tak- ing down the link forces a database swap. The reason why the server and the PMS are out of synchronization must be deter- mined and corrected.
Required Hardware
The PMS interfaces to the communications server through a data module (8400B plus or 7400A) connected to a digital port (TN2214 or TN754B). Unless otherwise instructed by the PMS vendor, set the data module speed at 9600 bps for Transparent Mode or ASCII Mode and 1200 bps for Normal Mode.
82Issue 1 April 1997
