User Manual - Configuration Guide (Volume 3)
Versatile Routing Platform Chapter 1
VoIP Configuration
1-6
---Line group access
Set line group access, you can set multiple physical lines as on e phone number, in this
case if there is an incoming call, it will automatically select the idle lin e for the re pl y to
reduce the configuration complexity and increase the networking capacit y.
1.2 VoIP Configuration

1.2.1 VoIP Configuration Task List

The configuration tasks of the VoIP include:
z Configuring dial-peer
z Configuring dial terminator
z Configuring abbreviated dialing
z Configuring voice port
z Configuring the global number match policy
z Configuring the recovery method of voice board

1.2.2 Configuring Dial-peer

The key to mastering the VoIP configuration lies in understanding the dial-peers.
According to different locations (the calling side or the called side), we can divide a call
into four segments in a complete phone-to-phone connection and each segment
(called call leg) corresponds to a dial-peer.
IP Network
Call leg for
IP Network
Router Router
IP Network
Source Destination
Call leg for POTS
dial peer 1 Call leg for VOIP
dial peer 2
Source
Destination
Call leg for POTS
dial peer 4
Call leg for VOIP
dial peer 3
Router
IP Network
Router
Figure VC-1-4 Call division viewed from the router at both ends
From the above figure, we can see that, there are two types of the d ial-peers used in
voice communications:
z POTS dial-peer
z VoIP dial-peer