ZyXEL Communications ISG50 User Manual
Chapter 27 Global PBX Settings
ISG50 User’s Guide
436
Click Configuration > PBX > Global > Fake IP to view the screen as shown next.
Figure 281
Configuration > PBX > Global > Fake IP
Each field is described in the following table.
27.6 The Peer to Peer Screen
Use this screen to allow the ISG50 to set up a direct connection between two IP phones on the
same subnet. This allows the ISG50 to remain free of the loading burden and free up IP PBX
resources (such as DSP channels). When a special feature request is made by either end of the
connection, such as call parking or music on hold, then the ISG50 re-establishes control of the
connection to implement the feature.
same subnet. This allows the ISG50 to remain free of the loading burden and free up IP PBX
resources (such as DSP channels). When a special feature request is made by either end of the
connection, such as call parking or music on hold, then the ISG50 re-establishes control of the
connection to implement the feature.
Click Configuration > PBX > Global > Peer to Peer to view the screen as shown next.
Figure 282
Configuration > PBX > Global > Peer to Peer
Table 144
Server > Fake IP
LABEL
DESCRIPTION
Enable Fake IP
Turn on fake IP to have the ISG50 replace the IP address inside all outgoing SIP packets
with the IP address of the upstream NAT router on your network. When the packets get to
their destination, the destination device can send its response to the embedded address
of the NAT router. The NAT router then forwards the packets downstream to the ISG50,
which in turn sends them to the device on the local end of the telephone conversation.
with the IP address of the upstream NAT router on your network. When the packets get to
their destination, the destination device can send its response to the embedded address
of the NAT router. The NAT router then forwards the packets downstream to the ISG50,
which in turn sends them to the device on the local end of the telephone conversation.
If you enable it, you must assign a value to the Fake IP Setting field.
Fake IP Setting
Enter the public IP address that the upstream NAT router uses to send out the ISG50’s
SIP traffic. This is the IP address that will be inserted into all outgoing SIP traffic.
SIP traffic. This is the IP address that will be inserted into all outgoing SIP traffic.
Apply
Click this to save your changes.
Reset
Click this to set every field in this screen to its last-saved value.