Installation guide

Application Note
SIP Gatewa
y IP Address: ______.______.______.______ (on the SIP Gateway LCD)
Max Calls: __________
Preferred Codec: ulaw G.711
Alternate Codec: G.729
Is Synapse Behind a Firewall?: Yes No
Is There a Local Firewall?: Yes No
Synapse External IP Address
Your SIP Gateway will use a private IP address of the form 192.168.x.x, 172.16.x.x –
172.31.x.x, or 10.x.x.x. This internal address is not routable on the public Internet.
In order for your SIP Gateway to connect to the Broadvox Session Border Controller
(SBC), you must translate your private IP address into a public IP address using a
Network Address Translator (NAT).
When the SIP Gateway is behind a NAT, your public IP address will typically be the
public IP address of your NAT. You may also have a static, one-to-one mapping of a
public IP address to your private IP address. In this case, your public IP address will
not match the IP address of your NAT, but you can look up the correct public IP
address in your NAT configuration. If in doubt, you can perform a network packet
capture using Wireshark (previously called Ethereal) on the public side of your NAT
while simultaneously issuing some form of Internet request on your Synapse server.
Sending Calls to Broadvox
In your Welcome letter, Broadvox provides IP addresses to which you may send
calls, and from which you should be prepared to receive calls.
At the top of your technical welcome letter, you will see a table like this one which
shows your account number, turn-up ticket number, and trunk number. This
information should be provided to Broadvox when you call for assistance to expedite
support.
Figure2:WelcomeLetterAccountInformation
The third page of the welcome letter contains a table of the IP addresses and ports
you need to allow through your firewall. Note that the table included here is an
example and may be out of date.
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