Phoning through different Telecommunication Carrier
7.1.1 Automatic Dialing of a Telecommunication Carrier
Using this method, you can program the number of your preferred telecommuni-
cation carrier. You can assign a certain set of digits to determine which connec-
tions this carrier should process. Enter prefixes, parts of prefixes or whole tele-
phone numbers.
The process functions as follows: As you dial a pre-programmed number, e.g.
area code, the TELES.iPBX 8TR Box identifies it and automatically inserts the
carrier access prefix and the actual carrier ID code. This information along with
the rest of the telephone number is sent on the D channel to establish the call in
the carrier’s network.
Example:
You dial 0 030 585858.
The box recognizes the area code 030 as a prefix to be routed, so
instead it sends:
0 1680 030 585858
This method is also suitable when you have not committed yourself by contract
for the preselect method, that is for one certain network carrier, but also would
not like to constantly dial the network carrier’s number before each individual
long-distance call.
7.1.2 Direct Line Access with Subaddressing
In other words: your TELES.iPBX 8TR Box calls a router directly and transmits
the dialed call number as subaddress via the ISDN D channel. The router estab-
lishes the connection to the dialed party.
The router’s access number and the digits for the connection to be routed are
pre-programmed with this method as well. In daily use everything is done as
usual: you dial only the desired call number – the box takes care that the call
number is transmitted along with the router’s access number.
The router ought to be one of the dial-in systems from TELES that support the
feature subaddressing, e.g. the TELES.iSWITCH. These powerful systems are
employed as corporate switchboards or as dial-in nodes with network carriers.
You can therefore also use this method to dial into the net of certain carriers.
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2004 by TELES AG Berlin, Version 2.0/iPBX8TRe/6.02, Issue: May 1998
