[asterisk-biz] VoIP Provider

[Alex Balashov]

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
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