Labels:bulletin board | monitor | sky | windowpane OCR: International long distance connectior Analogue C,Digital transit transit exchange exchange Analogue Digital Digital Digital locai tocal local ocal exchange exchange exchange exchange T1107800. 87 4-wire analogue tines 2-wire digital lines Note The trunks between local exchanges carry local traffic only FIGURE 2/Q.551 Interfaces ir possiblc network loterconnections connection toca possibie
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