PortaNet User Manual
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{ L N U M } C N U M S P I D A N S
VII.4
Configuring the communication interface
Before making any connection it is advisable to check that all the communication
interfaces are configured properly. The following is a quick guide to check this
configuration and how to modify it when necessary.
VII.4.1
Configuring the ISDN Terminal adapter
The ISDN Terminal adapter carries out all the signalling protocol in an ISDN
communication. The parameters to configure it are the following:
a.
Communication protocol
Check that the selected protocol is
compatible with the line provided by your Telco. Most countries except the
USA now use EISDN.
b.
Local number or ‘LNUM’
An abbreviation for ‘Local Number’. With
this option it is possible to assign a different number to each of the lines
available on the basic rate ISDN. In this way we can automatically map
incoming calls to each line, as each line will only respond to calls made to
this local number. When the local number is programmed the unit only
detects as an incoming call those calls that are made to the local number -
all other calls are not recognised.
c.
CNUM
An abbreviation for ‘Calling Number’. This option allows you to
program up to a maximum of three numbers that will work as incoming
call filters. When the CNUM option is activated, the PortaNet will respond
automatically only to calls made from these CNUM numbers. It is possible
to program each line separately.
