– Boost ringing on FXS ports or IP phone system analog ports that are weak or fail
– Boost ring power on analog PABX/KSU stations that are weak or fail
– Reshapes troublesome distorted ringing signals
– True Sine wave ring signal output
– Boosts ring to 4 REN
– Caller ID compatible
– Easy RJ-21X installation
– Compatible with distinctive ringing services
– Will not affect normal line operation
– Reshapes troublesome square wave ringing
– Fax and modem compatible
– Not compatible with pulse dialing