ST Group PIRANHA ST 500, Руководство пользователя

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ST 500 "Piranha" Operation Manual: Supplement #3 - Reference Information
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Line type Purpose
User device
two-wire analogue municipal telephone line, office PBX analogue line analogue telephone
two-wire digital office PBX digital line digital telephone
four-wire digital office PBX digital lines digital system telephone
four-wire hybrid office PBX hybrid lines analogue system telephone
PAIRS OF WIRES USED IN TELEPHONE CIRCUITS
line type RJ connector RJ connector pin #
Wire coloring
Modern Obsolete
2-wire analog
RJ-9 2-3 – analog signal
green
orange
red
green
RJ-11/14/25 3-4 – analog signal
white and blue
blue
red
green
2-wire digital RJ-11/14/25 3-4 – digital signal
white and blue
blue
red
green
4-wire digital RJ-14/25
3-4 – digital signal
white and blue
blue
red
green
2-5 – PBX commands
white and orange
orange
black
yellow
4-wire hybrid RJ-14/25
3-4 – analog signal
white and blue
blue
red
green
2-5 – PBX commands
white and orange
orange
black
yellow