Multi-Link "The Stick" : Voice/Fax/Modem Call Processor that automatically screens and routes calls to the right equipment. No professional rewiring is required for use in single-line homes or businesses. Other features include complete compatibility with existing equipment, easy programming and diagnostics, programmable "call override," "Caller ID" compatibility, silent transferring between equipment, "Power/Call Status" light, non-volatile memory that saves programming in case of a power outage, attractive and functional cabinet, barge-in protection, and a one year warranty on all parts and labor. This unit also maintains regular phone service in the event of a power outage. In addition, it is compatible with virtually all multi-line KSU and PBX phone systems when installed on a phone line before your system, and it comes with an operations manual containing easy-to-read installation procedures.