Prontonet User’s Manual v410 100
V.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).
Receiving calls over G711 (Voice mode): the ISDN indicates calls on
G711 as voice mode. The ProntoNet recognises this type of incoming call and
proceeds automatically to reconfigure the Encoder and Decoder to this mode.
As such, the user need not configure anything to allow the automatic
reception of incoming calls using G711.
The Law is selected automatically, depending on the ISDN protocol selected
– A Law for Euro ISDN and Mu Law for all others.
V.9.3 Restrictions in ISDN communications:
As we have already stated, the ProntoNet can work as a DUAL CODEC over
ISDN, meaning it can operate with two independent lines. However, this is only
possible when two MONO communications are used. The use of Dual, Joint
Stereo or Stereo modes creates certain restrictions on the system that are in
place to avoid conflicting situations.
1. DUAL, JOINT STEREO or STEREO modes are only available on Encoder 1.
2. When Encoder 1 is configured to DUAL, JOINT STEREO or STEREO, Encoder
2 is not available.
3. The ProntoNet will connect the line but the audio will not be
decoded in the following cases:
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