Hunt Logic; Manipulation Tables; Figure 6-9: Isdn Hunting Logic - AudioCodes MediaPack MP-40x series User Manual

6.2.2.4

Hunt Logic

ISDN Line hunting is achieved by aggregating several ISDN ports into one ISDN interface.
As described above, each ISDN port binds to an ISDN interface. If several ports bind to the
same ISDN interface, the ISDN interface selects a port with a free channel based on the
hunt logic defined in the ISDN interface. Note that hunt logic operates on ports and not on
B-channels. A port is considered non-free if there is no free channel on that port. And it is
considered free if there is at least one free channel.
The illustration below shows an example of an IP-to-ISDN call. The IP-to-Tel Call Routing
table (refer to Section
interface. The ISDN interface selects a B-channel on an available ISDN port.
6.2.2.5

Manipulation Tables

The VoIP gateway provides four Number Manipulation tables for incoming and outgoing
calls. These tables are used to modify the destination and source telephone numbers so
that the calls can be routed correctly. In additional to numbers, the manipulation tables
support manipulation roles based on signs and/or letters A possible use for number
manipulation can be to strip and add dialing plan digits from and to the number. For
example, a user could dial "9" in front of each number in order to indicate an external line.
This number ("9") can be removed before the call is setup.
The Manipulation Tables include the following tables:
IP to Tel Destination Number Manipulation Table for IP-to-Telephone (Tel) calls (refer
to Section
Tel to IP Destination Number Manipulation Table for Tel-to-IP calls (refer to Section
'Tel-to-IP Destination
User's Manual
'IP to Tel Routing

Figure 6-9: ISDN Hunting Logic

'IP-to-Tel Destination Numbers' on page 99)
Numbers' on page 101)
98
MediaPack BRI Series
Table' on page 108) determines the ISDN
Document #: LTRT-83702