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BT Pentara + Plus System Originally launched by BT in 1981 as the Herald 100E and later updated to the Pentara + Plus. It's a mid-range PABX / Keyphone hybrid much favoured by medium sized organisations. There are still many of them around and we have in stock TX 65, TX 68 Terminals. The Pentara + Plus was a favoured system for sites where single line telephones where the norm together with Keyphones for the main operators.
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Wiring Diagram for BT Pentara + Plus Systemphones using Line Jack Unit 2/3C
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Line Jack (2/3C) |
Colour |
Pin |
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A |
WHITE/Blue |
5 |
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B |
Blue/White |
2 |
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C |
White/Orange |
4 |
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D |
Orange/White |
3 |
Wiring Diagram for BT Pentara + Plus single line telephone
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Line Jack Unit 2/1A |
Colour |
Pin |
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A |
White/Blue |
5 |
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B |
Blue/White |
2 |
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Earth |
White/Orange |
4 |