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Basic Troubleshooting and Repair
SX-200 ICP and PMS Cannot Communicate
If the SX-200 ICP 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
• Invalid start (STX) and end (ETX) of text message characters
• Invalid function code message characters
• Invalid status code message characters
• Invalid room number message characters.
Testing the PMS Interface of the PBX
PMS problems typically occur in these areas:
• PMS Protocol settings: Ensure that the communication parameters
between the systems match.
• PMS Programming: Verify that all the recommended PMS and
Dataset programming is complete.
• RS232-to-IP serial port converter: Use a straight-through cable
between the customer’s PMS computer and the converter.
Test the SX-200 ICP PMS interface as follows:
1. Disconnect the customer’s PMS computer from Ethernet-to-Serial
converter.
2. Connect a personal computer to the converter.
- Ensure that the communications parameters of the personal
computer / terminal match those expected by the PBX’s PMS
interface.
- Verify that you receive the ENQuire character from the SX-200 ICP
PMS interface. If not, verify that all the programming and the
connections are correct.
