Arrangements providing connection between main exchange and sub-exchange or satellite

Full Title

Selecting arrangements (H04Q5/00 - H04Q11/00 take precedence) > Arrangements providing connection between main exchange and sub-exchange or satellite

Child Classifications

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• H04Q 3/60 for connecting to satellites or concentrators which connect one or more exchange lines with a group of local lines
• H04Q 3/62 for connecting to private branch exchanges