11. Specification for modems for connection to public switched telephone networks and speech band private circuits run by certain public telecommunications operators. (31st October 1992) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (16 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
12. Specification for modems for connection to the British Telecommunications public switched telephone network. (30th July 1982) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (8 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
13. Essential requirements for connection of terminal equipment to analogue interfaces of public switched telecommunications networks using either the earth calling, the loop calling, disconnect clearing, the loop calling, guarded clearing or the loop calling, unguarded clearing signalling method. (15th May 1995) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (52 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
14. Essential requirements for connection of terminal equipment to 2-wire analogue interfaces, without capacitive termination, of public switched telecommunication networks using either the earth calling, the loop calling-disconnect clearing, the loop calling-guarded clearing or the loop calling-unguarded clearing signalling method. (15th September 1996) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (52 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗