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Avaya Media Processing Server Series System Reference Manual
Page 216 # P0602477 Ver: 3.1.11
PeriPro Interaction
To be able to pass messages to other components of the IVR system, a PeriPro
application (VENGINE) or a service daemon must connect to a VMST process. This
process to connect to and its host are defined by a client's command line option -v
mps_num or -v host:mps_num (VENGINE and some older service daemons can
also define a host name by the deprecated option -N). If a host name is not specified,
the corresponding VMST must be running on the same node as a connecting client.
For example:
vengine -v 1 … app1
connects to a local VMST numbered 1, while
vengine -v ablaze:1 … app4
connects to a VMST numbered 1 on the host ablaze. Some service daemons (but
not VENGINE) can take several -v options to connect to several VMSTs
simultaneously, e.g.
periq -v 3 -v ablaze:2 …
In turn, VMSTs can interconnect in order to route messages to each other. For
example:
vmst -V 1 -v 2 -v flame:3 …
specifies that VMST number 1 (-V option) connects to a local VMST numbered 2 and
to a VMST numbered 3 running on the host flame.
Applications and service daemons can communicate only if they are attached to the
same or to directly interconnected VMSTs.
For example, in the preceding diagram, app1 and app2 can communicate with any
other application, whereas app3 can reach app1, app2, and app4 but cannot reach
app5. This is because a one-to-one relationship must exist between VMSTs, and in
the case of app3 and app5, a total of three VMSTs would have to be involved in
the communication link. The periq service daemon, meanwhile, is connected to
local VMST 3 and remote VMST 2, and can communicate with all the applications
through these connections.
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