1 Line Ring Shaper - Booster. The RG-4 ring generator is designed to reshape and increase the ringing power of an existing telephone line, PABX extension, or any other telecom device which provides ringing. The RG-4 duplicates the incoming ring cadence allowing it to be compatible with custom ringing features. The RG-4 is capable of ringing four 1 REN or eight 0.5 REN telephones and does not affect normal operation of the telephone line or features provided by the phone company, such as caller ID and call waiting. The Viking model RG-10A may be used for higher drive output applications. Applications Reshapes troublesome distorted ringing signals Boosts ringing power of analog ISDN Terminal Adapter Ports Use with Viking s doorboxes to increase the number of phones they can ring Boost ring power on telephone lines or analog PABX/KSU stations that are weak or fail Features True Sine wave ring signal output Boosts ring to 4 REN Caller ID compatible Easy installation Compatible with distinctive ringing services Will not affect normal line operation Reshapes troublesome square wave ringing Not compatible with pulse dialing.