N412 Administrator Manual
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Trunks
External calls can be made through CO lines, BRI trunks or via VoIP trunks on N412.
In this chapter, we give a simplified guide to the N412 users in setting up trunks. We
describe CO, BRI lines configurations and how to configure N412 to work with VoIP
Providers.
CO Lines
CO lines also known as PSTN trunks. The public switched telephone network (PSTN)
is the network of the world's public circuit-switched telephone networks.
Go to
PBX
→ Extensions and Trunks→ Trunks → CO lines
to edit the CO lines.
Before configuring a CO line, please make sure that the CO line is connected to N412
CO port.
Click
to edit the CO line.
CO Line Configuration
Please check the CO line configuration parameters below.
1) General Settings
Table 6-1 CO Line-General Settings
General Settings
Trunk Name
A unique label used to identify this trunk.
Volume Setting
Set the volume for this trunk. The default is 40%.
2) Hangup Detection
Hangup detection settings help the system to detect if a call is hung up. If you find
the PSTN call could not be disconnected, these settings need to be configured.
Table 6-2 CO Line-Hangup Detection
Hang up Detection
Hangup Type
Choose the Hangup type.
Default
Busy Tone
Polarity
