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SOLIDA SYSTEMS INTERNATIONAL 2017
Appendix A. VoIP Caller Blocking
The appliance can be used for blocking callers in a VoIP network. Blocked caller phone numbers
are provided to the appliance in the form of a text file.
A.1 Appliance Setup
The appliance is designed to be installed as an end-point device, installed between the Internet
router and the main VoIP network switch as the picture below illustrates.
Figure A.1 The appliance installed in a VoIP network.
If the network uses a firewall between the Internet router and main switch, install the appliance in
front of the firewall just behind the Internet router. The appliance will be invisible to the firewall
since it requires no IP or MAC addresses for its ports.
A.2 Blocked Numbers List
The user must provide a list containing the phone numbers that are to be blocked. The list must be a
simple ASCII text file created with a text editor tool.
The name of this file must be “sip.txt”.
The
appliance will accept no other name. It is also important that the list does not contain any
formatting characters like those used by advanced word processors such as MS Word. Each line in
the text file must contain only one phone number, or range of phone numbers. For example:
