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Page 134
V.7.1
Establishing ISDN calls
The proper NET parameter must be selected for ISDN calls (see picture on
section III.3.1). ISDN destination numbers are entered at the dial menu or an
entry from the Address Book is selected using the BOOK key
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. Bear in mind that
the use of an entry in the Address Book will also reconfigure the Encoder and so
is not limited to only making calls. We need to distinguish between calls at 64
Kbps and calls at 128 Kbps:
Making calls at 64 Kbps
The user has to select an audio compression mode compatible with a 64kbps
bearer channel. Then he has to type the destination ISDN number into the
<Phone> box of the Line 1 or Line 2.
Making calls at 128 Kbps
The user has to select an audio compression mode compatible with a 128kbps
bearer channel. Then he has to type the destination ISDN number into the
<Phone> box of Line 1.
The codec will dial first for the bearer channel assigned Line 1, then after
automatic or manual response (see next section for details) of the first bearer
channel, the second bearer channel is dialled by the codec towards the mate
bearer channel of the same destination. After automatic or manual response (see
next section for details) of the second bearer channel the audio streaming over a
128kbps capacity can go ahead.
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ISDN sub-addressing is possible apending the ISDN number to dial with the ASCII char
(version 5.5.0 onwards).
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