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10 CHAPTER 1: VCX SYSTEM SECURITY
Ending UDP Port Number
To calculate the ending port number in the UDP range, use this formula:
UDP ending port number = (UDP Start Port) +(Number of Ports -1)
Analog and Digital
Gateway Ports
The VCX system includes V7111 Analog Gateways for connection to the
Public Swithced Telephone Network (PSTN) through analog phone lines or
to analog telephones and fax machines. It also uses digital gateways to
connect to the PSTN (T1 and E1 spans).
The V7111 Analog Gateways use these ports:
Formula Element Explanation
UDP Start Port See the calculation in “Starting UDP Port Number”, earlier in
this section.
Number of Ports The default for IP Messaging is 144 ports. During the IP
Messaging installation process, you are given an opportunity
to change this value. If you changed the value, use the
number that you chose.
Add the number of ports used by the V7111 and V7122
gateways on your system. See
“Analog and Digital Gateway
Ports”, later in this section.
Table 1 V7111 Analog Gateway Port Numbers
Channel Number UDP Port T.38 Port (fax)
1 4000 4002
2 4010 4012
3 4020 4022
4 4030 4032
5 4040 4042
6 4050 4052
7 4060 4062
8 4070 4072
9 4080 4082
10 4090 4092
11 4100 4102
12 4110 4112
13 4120 4122
14 4130 4132