Transformer
- PART OF:
- Phone maintenance equipment
- Made:
- unknown in unknown
This image is released under a CC BY-NC-SA 4.0
Licence
License this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0
Licence
License this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0
Licence
License this image for commercial use at Science and Society Picture Library
License
Science Museum Group
© The Board of Trustees of the Science Museum
Science Museum Group
© The Board of Trustees of the Science Museum
Science Museum Group
© The Board of Trustees of the Science Museum
Transformer
This set of equipment was owned by an engineer, who used it to maintain council telephone lines and cables within the Royal Borough of Kensington and Chelsea. These lines were part of the Integrated Services Digital Network (ISDN), allowing for digital transmission through the analogue cables of the public switched telephone network (PSTN). From 1985, the ISDN enabled improved speeds on phone lines, and services such as videoconferencing, data services, and internet access. By the end of 2025, BT will turn off all PSTN and ISDN services, making a shift from analogue to digital telecommunication technology.
Details
- Category:
- Telecommunications
- Object Number:
- 2026-32/7
- Materials:
- metal (unknown) and plastic (unidentified)
- Measurements:
-
overall: 140 mm x 90 mm x 110 mm,
- type:
- transformer
- credit:
- Matthew Pearce
