Pbx And Pms Cannot Communicate; Testing The Pms Interface Of The Pbx - Mitel SX-200 EL Technician's Handbook

PBX and PMS Cannot Communicate

If the PBX's PMS interface and the customer's PMS computer cannot
communicate, the system will generate PMS related maintenance log
messages. Typically, PMS maintenance log messages will identify
Operating status of the PMS
n
Invalid start (STX) and end (ETX) of text message characters
n
Invalid function code message characters
n
Invalid status code message characters
n
Invalid room number message characters.
n

Testing the PMS Interface of the PBX

PMS problems typically occur in these areas:
PMS Protocol settings: Ensure that the communication
n
parameters between the systems match.
PMS Programming: Verify that all the recommended PMS and
n
Dataset programming is complete.
PMS Cabling: Use a straight-through cable between the customer's
n
PMS computer and the Dataset.
Test the PBX's PMS interface as follows:
1. Disconnect the customer's PMS computer from the Dataset.
2. Connect a personal computer or terminal to the Dataset's RS-232
port.
Ensure that the communications parameters of the personal
n
computer / terminal match those expected by the PBX's PMS
interface.
Verify that you receive the ENQuire character from the PBX's PMS
n
interface. If not, verify that all the programming and the connections
are correct.
3. Type the PMS message required to light a telephone's message
waiting lamp, using CAPITAL letters only. See the following
example.
Troubleshooting and Repair
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