Fortinet Technologies Inc. Page 180 FortiVoice Enterprise Phone System 4.0.0 Administration Guide
Advanced Options
Framing and
coding option
Specify the type of framing and coding to provision the PRI with
your PSTN service provider.
Clocking
options
Select the FortiVoice unit’s clock synchronization:
• Clock sourcing from PSTN network
• Internal clocking source
This option does not need to match that of your PSTN service
provider.
Receive
sensitivity
Select the level of receiver sensitivity which is the ability of the
phone receiver to pick up the required level of phone signals to
make it operate more effectively within its application.
This option does not need to match that of your PSTN service
provider.
D-channel
signalling
format
Select a signalling method for the D channel which is a signalling
channel and carries the information needed to connect or
disconnect calls and to negotiate special calling parameters (for
example, automatic number ID, call waiting, data protocol). The D
channel can also carry packet-switched data using the X.25
protocol.
Line build out Select the line build out (LBO).
LBO settings are an inherent part of T1 and T3 network element
transmission circuitry.
Since cable lengths between network elements and digital signal
cross-connect (DSX) vary in the central office, LBO settings are
used to adjust the output power of the transmission signal to
achieve equal level point (ELP) at the DSX.
D-channel By default, depending on your selection of “Type” on page 179,
the typical channel numbers are:
• Full T1: 24
• Full E1: 16
You can also set the channel numbers to others such as 1.
The settings you configure must match the same settings of your
PSTN service provider.
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