The SpotCheck® ADSL Presence Tester is a basic go/no-go ADSL modem verification unit. The unit is optimized for use by telephone company central office technicians to verify their ADSL wiring and turn-up has been completed successfully. It verfies the ADSL line is provisioned and physically configured correctly. Installation and maintenance technicians can also use the unit at a customer premise to check for ADSL presence. Simply connect the cord to the line to be tested and turn on the power for the SpotCheck® ADSL Presence Tester. The unit will identify modem sync with its easy-to-read LEDs. If it’s a green light, it’s a go!