System interfaces
33
System functions and features as of R4.1
syd-0570/1.2 – R4.1 – 08.2016
2. 1. 2. 3 Direct Dialling Out (DDO)
If an external fax server is connected to an S bus, individual fax recipients allocated a
DDI number can be specifically addressed. In terms of routing technology, this corre-
sponding to a DDO (Direct Dialling Out) function.
The external fax server forwards the incoming faxes via e-mail to the relevant PC sta-
tions that are set up as fax recipients.
Fig. 10 Direct Dialling Out (DDO) to a fax server
Due to the configuration of the BRI-S interface as BRI-S external and the use of the
DSS1 protocol, the fax calls can be routed via routes and trunk groups. This means
that all fax receivers that have been allocated a DDI number can be reached via a sin-
gle BRI-S interface.
See also:
"Call to a DSS1 terminal equipment on the S Bus (DDO)", page 206
Tip:
The CPU2 applications card of an Mitel 470 communication server already contains a fax
server and its use is subject to the acquisition of the relevant licences.
77
76
75
DDI BRI-S
Fax receivers with
allocated a DDI
numbers
Fax servers
ISDN
Communica-
tion server
S
external
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