User's Manual

Figure 88: TCP Server Error response
In an operational environment, the eTM_HA instances of the Subscribers send these two
requests to the publisher on a regular basis: KeepAlive, and GetImage.
• KeepAlive
A KeepAlive request is exchanged between subscriber and publisher, and allows both
parties to verify the presence of the other. Interval and timeout between attempts are
defined in the registry.
Figure 89: TCP Server Keep Alive response on page 85 shows an example of what is
sent during this exchange. To test this response, Avaya recommends using Internet
Explorer on the Subscriber.
Figure 89: TCP Server Keep Alive response
• GetImage
The GetImage request is sent from each Subscriber to the Publisher on a regular time
interval, as specified in the registry. The publishing system responds to such a request
with an XML image of the Messenger_CFG database.
Figure 90: TCP Server Get Image
response on page 86 shows an example.
Publisher
DECT Messenger Installation and Commissioning — Book 2 March 2012 85