Sequential Ringing System Description Key Features ® The Lorain SCT2 sequential multifrequency ringing system provides up to five time-    •  Microprocessor Microprocessor Microprocessor Microprocessor Microprocessor T T T T Technology echnology echnology echnology echnology division multiplexed ringing output frequencies. A single 50VA remote-programmable and Modular Design and Modular Design and Modular Design— and Modular Design and Modular Design ringing generator, under control of its adjacent sequence module, provides the multiplexed, provides a broad range of multifrequency output. The sequencer is in-field user programmable and can generate single ringing frequencies, output voltages and ringing periods frequency, multifrequency or coded “distinctive ringing” cadences, all without the need for in less space system firmware changes, multiple-ringing generators or external interrupters and ringing relays. The SCT2 system is extremely compact, with a fully duplicated (redundant) 50VA      RUS* Approved Ringing RUS* Approved Ringing RUS* Approved Ringing RUS* Approved Ringing RUS* Approved Ringing system occupying only four 1.75" (4.45cm) spaces in a standard 23" (58.42cm) relay rack Generator Modules Generator Modules Generator Modules—assure Generator Modules Generator Modules framework. governmental agency compliance for RUS-financed installations Application The SCT2 is ideally suited for use in compact digital CDO’s (community dial offices), either      Stable Output Frequencies Stable Output Frequencies Stable Output Frequencies— Stable Output Frequencies Stable Output Frequencies 15 to 66.67 Hz with less than host offices or remote switch units, or for general purpose, multifrequency ringing 5% harmonic distortion applications requiring a time-division multiplexed output.      High Efficiency High Efficiency High Efficiency—reduces High Efficiency High Efficiency Additional Information operating costs For additional specifications, engineering and installation information, specify Model SCT2, *RUS RUS RUS—Formerly RUS RUS REA REA REA ( REA REA R R R R Rural spec. number 58865020010 (system); Model SCT2, spec. number 58865020002 (expansion E E Electrification E E A A A A Administration, cabinet); model T50P, spec. number 487110400 (ringing generators); and model SCT2, spec. U.S. Dept. of Agriculture) number 58865020004 (digital volt/frequency meter). T50P T50P T50P T50P T50PA A A A A Sequence Sequence Sequence Sequence Sequence Module Module Module Module Module T T T T Transf ransf ransf ransf ransfer er er er er Module Module Module Module Module Sequence Sequence Sequence Sequence Sequence Module Module Module Module Module T50P T50P T50P T50P T50PA A A A A Module Module Module Module Module Module Module Module Module Module LLP 8-1 LLP 8-1 LLP 8-1 LLP 8-1 LLP 8-1 Sequential Ringing System Configuration Information Other arrangements, using one, two, three or four frequencies, can be in-field programmed. Frequencies may be harmonic, synchromonic, decimonic or 20 Hz single frequency. Special combinations of these frequencies are available by in-field programming. TYPICAL 5-FREQUENCY MULTIPLEXED OUTPUT TYPICAL 4-FREQUENCY MULTIPLEXED OUTPUT TYPICAL 3-FREQUENCY MULTIPLEXED OUTPUT TYPICAL “DISTINCTIVE RINGING” OUTPUT (S = SHORT M = MEDIUM L = LONG) 6 SECOND RINGING PERIOD www www.marconi.com .marconi.com/pow /power er www www www.marconi.com .marconi.com .marconi.com/pow /pow /power er er ® Lorain is a trademark of Marconi Communications Inc. Marconi Communications Marconi Communications Marconi Communications Marconi Communications Marconi Communications 1122 F Street © 2000 Marconi Communications Inc. Lorain, OH 44052 Printed in the USA. All rights reserved. Any unauthorized 800-800-1280 reproduction or transmission without the prior consent of LLP 8-2 LLP 8-2 LLP 8-2 LLP 8-2 LLP 8-2 Fax: 440-246-4876 Marconi Communications Inc. is prohibited.