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ADSL Explained

Nomenclature

The following two icons are used to represent the signal bandwidth that will appear at different points of the premises wiring.

 REF-ADSL-300hzsmall.gifIndicates a voice-call signal.

 REF-ADSL-25mhz300hzsmall.gifIndicates mixed voice-call and ADSL signals.

Coloured lines are used represent the type of premises wiring as indicated below.

Standard twisted-pair telephony cable.
A network (Cat-5 or Cat-5e or Cat-6) cable.

The majority of telephone premises-wiring uses star-wired  or parallel-wired configurations. In a star-wired configuration the telephones are all wired back to a "master" socket or distribution box. In a parallel-wired configuration, the cable run passes sequentially from socket to socket at each telephone.

Star-wired configuration Parallel-wired configuration
REF-ADSL-star-wire-config.gif REF-ADSL-parallel-wire-config.gif

Note: In any of the drawings in these reference pages, any analogue telephony device (fax analogue modem, answering machine, alarm unit, etc) can replace any telephone.

 

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