Additional confusion exists because there exist specifications for short-haul physical (electrical) delivery of DS1 and DS3 signals -- usually for cross-connect purposes -- known as DSX-1 and DSX-3.
These specifications, while predominantly composed of general signal specifications, also concretely reference the electrical characteristics of metallic interconnection points, so these are not entirely "abstract" specifications for a "different type" of DS1 signal. Thus, they fail to conserve the DSn vs. (Tn, OCn, etc.) conceptual distinction entirely. There also dwell, in considerably greater obscurity, standards for electrically cross-connecting (relatively) low-speed SONET carrier signals - STSX-1, STSX-3. -- Alex Balashov Evariste Systems Web : http://www.evaristesys.com/ Tel : (+1) (678) 954-0670 Direct : (+1) (678) 954-0671 Mobile : (+1) (706) 338-8599 _______________________________________________ --Bandwidth and Colocation Provided by http://www.api-digital.com-- AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-biz mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-biz
