Black Box mm146 User Manual page 80

Videophone for use over the Internet
IP Address 192.168.1.1
Subnet Mask 255.255.255.0
Default Gateway 192.168.1.254
UDP port 5000
192.168.1.254
Hub / Switch
IP Address 192.168.1.2
Subnet Mask 255.255.255.0
Default Gateway 192.168.1.254
UDP port 5001
Notes: Callers dial the external IP address of the firewall appended by the port number.
The firewall will be unblocked by creating the static network address translation.
H.323 calls originating outside the firewall are not supported (MMTPB only).
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Example 3 - configure your IP
Port Forwarding entry
Translate
66.77.88.99:5000 to
192.168.1.1:5000
Translate
66.77.88.99:5001 to
192.168.1.2:5001
Router
Firewall
66.77.88.99
Port Forwarding entry
Translate
99.88.77.66:5000 to
192.168.2.1:5000
Translate
99.88.77.66:5001 to
192.168.2.2:5001
Router
Internet
99.88.77.66
IP Address 192.168.2.1
Subnet Mask 255.255.255.0
Default Gateway 192.168.2.254
UDP port 5000
192.168.2.254
Hub / Switch
Firewall
IP Address 192.168.2.2
Subnet Mask 255.255.255.0
Default Gateway 192.168.2.254
UDP port 5001