PortaNet User Manual
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5.
Communications combining 128 and 64 Kbps
: It is possible to
transmit encoding audio at 128 Kbps and to receive decoding audio at
64 Kbps or vice versa. Here below there are different examples of it.
IX.9.1
Establishing ISDN calls
To make a call the CALL 1 and CALL 2 keys are used, or an entry from the
Address Book is selected using the BOOK key. 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 CALL 1 key is for calling on Line 1 and the CALL 2 key is for calling on Line
2. On pressing the CALL 1 key the display prompts you to enter a number. Once
the number is entered and the ENTER key is pressed, the PortaNet will go ahead
and make the call.
The CALL 2 key operates in exactly the same way.
Making calls at 128 Kbps
Each line needs to be connected independently using the CALL 1 and CALL 2
keys.
To disconnect a call press and hold the appropriate CALL key for more than
one second.
IX.9.2
Receiving calls via ISDN
In general you must bear in mind the following when dealing with incoming ISDN
calls:
Automatic or manual response:
Incoming calls can be answered
automatically or manually depending how the menu option ANS is
configured for the ISDN port. If the ANS mode is set to manual, the
appropriate CALL key must be pressed to accept the call and connect to it.
Call filters:
It is possible to record up to three numbers for each line that
work as call filters, meaning that the line will only connect to calls that
come from these pre-programmed numbers. This option is found in the
ISDN set up menus under CNUM (Calling Number).
Local number
: It is also possible to assign a single number to each line
in a way that the line will only respond to calls to this local number. This
can be used if you need to map an ISDN directory number to a specific
audio port. This option is found in the ISDN set up menus under LNUM
(Local Number).
