Link Alive

To test the communication or to receive the current date and time from SIHOT, either system can send a LA record at any time. It will contain the status ‘0’. If the communication works, the receiving system answers immediately with a LA record with the status ‘1’. When sent by SIHOT, the record will also contain the current date and time.

• SIHOT will not synchronize on the other system’s time but expects the other system to synchronize on its time since the PMS is a server with several interfaces attached to it. Therefore it is not necessary to include the CDT tag when sending the “LA” record to SIHOT.
• The status byte prevents an infinite loop of “LA” going back and forth.

Operationcode: LA

LA

Direction

IF Partner → SIHOT

Message

A complete example of the HTTP POST message looks like this:

<?xml version="1.0" encoding="ISO-8859-1"?>
<SIHOT-Document>
  <OC>LA</OC>
  <TN>1</TN>
  <CDT>2017-08-11T13:20:00</CDT>
  <STATUS>0</STATUS>
</SIHOT-Document>

Attributes Message

Attribute	Denotation	Type
OC	Action Type: LA = Link Alive	String
CDT	Current Date Time	Date Time
STATUS	Status	uns. Int

Response

<?xml version="1.0" encoding="ISO-8859-1"?>
<SIHOT-Document>
  <OC>LA</OC>
  <TN>1</TN>
  <CDT>2017-08-11T13:20:00</CDT>
  <status>1</status>
</SIHOT-Document>

Attributes Response

Attribute	Denotation	Type
OC	Action Type: LA = Link Alive	String
CDT	Current Date Time	Date Time
STATUS	Status	uns. Int