GEC Plessey Telecommunications
| Company type | Joint Venture | 
|---|---|
| Industry | telecommunications | 
| Predecessor | GEC Plessey | 
| Founded | 1988 | 
| Defunct | 1998 | 
| Fate | Merged into Marconi Communications (1998) Amalgamated into Siemens Communications (1998) | 
| Successor | Marconi Communications Siemens Communications | 
| Owner | |
| Website | gpt.co.uk at the Wayback Machine (archived 1997-12-11) | 
GEC Plessey Telecommunications (GPT) was a British manufacturer of telecommunications equipment, notably the System X telephone exchange. The company was founded in 1988 as a joint venture between GEC and the British electronics, defence and telecommunications company Plessey. The next year, after a joint holding company of GEC and the German conglomerate Siemens acquired Plessey, GPT was converted into a 60/40 GEC/Siemens joint venture. The GPT name ceased to be used in the mid-1990s, and in 1998 the company was amalgamated into Siemens Communications.