A sweep of the telephone address space is used to detect unauthorized modems and authorized but insecure modems. These tests are also used to ensure authentication systems are in place and to exploit any vulnerability that may exist. A telecommunications sweep tests to see that no backdoor access is available to the system or network.

The methods and procedures SPI – Security Solutions uses in a telecommunications sweep have proven effective in verifying the existence and status of modems connected to the network and/or host systems.