Multi-Tech Systems E1 - Manual (Page 120)

Technical Configuration MultiVOIP User Guide
120
SPP Call Signaling Parameter Definitions
(cont’d)
Field Name Values Description
Proxy/NAT Device
Parameters
Behind
Proxy/NAT
device
Y/N Enables MultiVOIP (running
in SPP Registrar mode) to
operate ‘behind’ a proxy/NAT
device (NAT = Network
Address Translation).
Proxy/NAT
Device
Parameters –
Public IP
Address
n.n.n.n
where
n=0-255 The public IP address of the
proxy/NAT device which the
MultiVOIP is behind.
An example of a NAT-equipped SPP network is shown below.
About SPP Proxy/NAT Device Parameters
IP
Network
SPP Client/Registrar System
Client
Voip
Public
Client
Voip
Public
Client
Voip
Public
Client
Voip
Public
Proxy/NAT
Device
Public IP
Private IP
IP
IP
IP
IP
Registrar
Voip
A Proxy/NAT device is sometim es used
in a Client/Registrar SPP voip system
where the registrar vo ip is in a private
network but se rves client voips on a
public network. The Proxy/NAT device
isolates (protects) the registrar voip
from the p ublic netwo rk.
In such cases, you must check the
“Enable SPP Proxy/NAT device” checkb ox
in the Pho nebook Config uration screen
of the Registra r voip. The p rivate registrar
voip can then function with the clie nt voips
using th e public IP address of the Proxy/NAT
device. You must e nter this address in the
Pub lic IP Address field.