NEC Property Management System Communication Interface Specification

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Chapter 4 Message Formats
All messages sent between the NEAX and the PMS must have header and trailing 
sections as defined in the following format:
Figure 4-1   Base Message Format
The message format breaks down as follows:
STX -- Start of text block. (One byte - 02H.)
SA -- System Address. (One byte - ‘1’ [31H].)
UA -- I/O Unit Address. (One byte - ‘!’ [21H].)
EI -- Entry Index. (One byte - ‘L’...

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Note 3:
In the case of messages that are almost identical, the FC will be marked with 
“**”. Also, differing FTC values will be marked with “*”. The final message is 
then constructed by simply inserting the desired FC value (and, if necessary, the 
desired FTC value).
All messages in this section have been previously defined in 
NEAX2400 IMS Hotel 
System PMS Interface Specification (except for one Maid...

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The format of all Data Link Maintenance messages are exactly as follows:
Figure 4-2   Data Link Maintenance Message Format
The message format breaks down as follows:
FC -- Function Codes that use this message format are: (FTC-FC)
70-0 -- Nop Test Normal Answer
70-2 -- Nop Test Recover Answer
70-3 -- Recovery Start Report
70-4 -- Recovery End Report
70-5 -- Data Link Release Request
70-6 -- Data Link...

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51-7 -- Guest Room 7 (Model 90) 
Note:
This message was not previously defined in NEAX2400 IMS Hotel System PMS 
Interface Specification.
51-8 -- Negative Answer (Model 90)
51-9 -- Positive Answer (Model 90)
52-1 -- Administration 1 (Model 90)
52-2 -- Administration 2 (Model 90)
52-3 -- Administration 3 (Model 90)
52-4 -- Administration 4 (Model 90)
All messages designated “Model 90” are used only...

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Guest Room
Figure 4-4   Guest Room (General)
Message fields are:
FC -- Function Codes that use this message format are: (FTC-FC)
51-1 -- Guest Room 1 (Model 90)
51-2 -- Guest Room 2 (Model 90)
51-3 -- Guest Room 3 (Model 90)
51-4 -- Guest Room 4 (Model 90)
51-5 -- Guest Room 5 (Model 90)
51-6 -- Guest Room 6 (Model 90)
51-7 -- Guest Room 7 (Model 90) 
Note:
This message was not previously defined...

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Room Answer
Figure 4-5   Room Answer (General)
Message fields are:
FC -- Function Codes that use this message format are: (FTC-FN)
51-8 -- Negative Answer (Model 90)
51-9 -- Positive Answer (Model 90)
Extension -- Extension number.   If the extension number is less than six digits, 
left justify the number and fill the remaining bytes with space (20H) characters.
LEN -- Line Equipment Number.
Request...

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Administration
Figure 4-6   Administration (General)
Message fields are:
FC -- Function Codes that use this message format are: (FTC-FC)
52-1 -- Administration 1 (Model 90)
52-2 -- Administration 2 (Model 90)
52-3 -- Administration 3 (Model 90)
52-4 -- Administration 4 (Model 90)
Extension -- Extension number.   If the extension number is less than six digits, 
left justify the number and fill the...

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Message Waiting Lamp Control
These messages are used to control the message waiting lamps on all of the phones. 
Messages sent by the PMS are commands to turn a message waiting lamp on or off. 
Messages sent by the NEAX are notification that a message waiting lamp has been 
turned on or off. This message group uses multiple Feature Codes. The code pairs 
are as follows (first number is the Feature Code,...

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MWL Status
Figure 4-8   MWL Status
Message fields are:
Extension -- Extension number.   If the extension number is less than six digits, 
left justify the number and fill the remaining bytes with space (20H) characters.
Status -- Message Waiting Lamp status. The status values are:
0 -- No messages waiting.
1 -- Message waiting set by the NEAX.
4 -- Message waiting set by the PMS.
5 -- Message waiting...

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Restriction Control
There are two messages. They are identical, except that message 15-1 is sent from 
the PMS to the NEAX, and message 15-2 is sent by the NEAX to the PMS. These 
messages simply communicate a new restriction code for an extension. These 
messages are used by both the Model 60 and the Model 90 version.
Figure 4-9   Restriction Control
Message fields are:
FC-- There are two functions:...