The model 3500-120 ring system is designed to supply ringing current to circuits not handled by the digital switch. These can be Private Line, Metallic Facility, Dial Long Line, Foreign Exchange, or Test Desk. The compact size and the many available configurations make the 3500-120 an excellent choice for Bulk Ringing applications such as Channel bank or Subscriber Loop Carrier circuits.

A standard unit will give the user a redundant ringing supply in 25, 50, or 100 watt choices and 10 distribution fuses. A meter is provided to monitor output voltage and current demand. This feature gives you the information you need on your ringing capacity as you plan for future growth. If loads exceed or get close to exceeding the capacity of your ringing supply you will be forewarned and save costly downtime and those hard to explain trouble tickets.