The SQRG-12 Sequential Ring Generator is designed for applications where more than one person answers incoming calls and those persons may be in locations where the TMS-6X or TMS-12A is not visible. The SQRG-12 eliminates confusion about which line to answer next by displaying the oldest call as a ringing line on all phones in the phone system. Applications Generate automatic oldest call notification for the TMS-6X Generate automatic oldest call notification for the TMS-12A Eliminates call crashing on outbound calls when used with Viking s TMS-6X or TMS-12A Call Sequencers Features Compatible with ground or loop start lines Re-rings calls held by Viking s TMS-6X or TMS-12A Call Sequencers Selectable ring cadence 10 REN load total One year warranty Made in the USA Specifications Power: 120V AC/13.8V AC 1.25A UL listed adapter provided Dimensions: 210mm x 160mm x 44mm (8.25 inch x 6.25 inch x 1.75 inch) Shipping Weight: 1.36 Kg (3 lbs) Environmental: 0 C to 32 C (32 F to 90 F) with 5% to 95% non-condensing humidity REN: 10.0 Connections: (2) RJ21X jacks, (2) RJ14 jacks Maximum Run: 305 m (1000 ft) between SQRG-12 and sequencer