Fitting RotaTone to a GPO 232
Note: There are differences with the wiring on terminals 6 and 8 on Type 1 and Type 2 232’s. Check phone before wiring with RotaTone – don’t rely on the wiring diagram inside the case – this maybe incorrect.
As always, take photos from all angles, before you make any changes.
Below shows a converted GPO 232 before RotaTone is fitted.
Below is a converted GPO 232, without a Bellset, before RotaTone is fitted.
Note B – 3.3k resistor – fitted if required, if not there will be a strap/link. A 3.3kΩ REN should be fitted if your telephone has 2 x 500Ω bell coils.
Below is a converted GPO 232, without a Bellset, but including an Internal Bell before RotaTone is fitted.
Note A – Rectifier no. 205 – can be fitted, email before purchase if you require one.