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. The Pentara + Plus was a favoured system for sites where single line telephones where the norm together with Keyphones for the main operators.
Wiring Diagram for BT Pentara + Plus Systemphones using Line Jack Unit 2/3C
Line Jack (2/3C) |
Colour |
Pin |
A |
WHITE/Blue |
5 |
B |
Blue/White |
2 |
C |
White/Orange |
4 |
D |
Orange/White |
3 |
Wiring Diagram for BT Pentara + Plus single line telephone
Line Jack Unit 2/1A |
Colour |
Pin |
A |
White/Blue |
5 |
B |
Blue/White |
2 |
Earth |
White/Orange |
4 |
Company Registration Number: 4080113 (England)
VAT Number: 471 1806 58
Registered Office: Progress House, 206 White Lane, Sheffield S12 3GL
Director: Dennis Hanna