Technical data

SINAUT TD7 software package for the CPU
2.2 Principle of communication between SINAUT objects
Software
204 System Manual, 07/2009, C79000-G8976-C222-07
case at present) or there are no partner addresses specified in the typical. In the latter
situation, the TD7 software automatically transmits to all subscribers for which a connection
has been configured (using the SINAUT connection configuration). In the example above,
subscriber 1 needed to have connections configured for subscriber 2 as well as for
subscribers 3 and 4.
Based on this connection configuration, from the subscriber records it is known that
subscriber 1 has a local connection with subscriber 2 as well as a WAN connection to
subscribers 3 and 4 both over through the local TIM module. The TD7 software then puts
together two messages: One message is sent to the locally available partner 2 over the MPI
bus, the other message is sent to the TIM for transmission. For its part, the TIM checks
which partners it knows in conjunction with subscriber 1. From its records it identifies
subscriber 3 and subscriber 4.
If the WAN is a dial-up network, the TIM duplicates the message: once for subscriber 3 and
once for subscriber 4. The TIM adds the destination subscriber numbers 3 or 4 to the
messages that are not yet in the messages. The TIM then establishes the connection to
subscriber 3 and sends the message intended for it. Following this, the TIM calls subscriber
4 and transmits its copy of the message.
If the WAN is a dedicated line network and the TIM of subscriber 3 is the polling master
(master TIM), the subscriber 1 TIM cannot transmit directly to 3 and 4 as it can in a dial-up
network. In this situation, the message for subscriber 4 must be transmitted indirectly over
the master TIM in subscriber 3. The message to be sent is not duplicated; it is given two
destination addresses, one for subscriber 3 and one for subscriber 4. This message is then
to the master TIM sent with the next poll. Based on the destination addresses and its
subscriber records, the TIM recognizes that one of these destinations can be reached locally
and the other over the dedicated line network. The master TIM then makes a copy of the
message. Destination address 4 from the original is removed and the message forwarded
with the remaining destination address 3 to subscriber 3 that is available locally. The copy
only includes destination address 4 and is sent to the TIM of subscriber 4 over the dedicated
line from where it is then passed on to subscriber 4.
Interaction of the blocks
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