1. Apparatus for connection to private circuits run by certain public telecommunication operators. Specification for apparatus for connection to digital circuits according to CCITT Recommendation X.21 bis Part 7, (15th July 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (14 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Glossary of electrotechnical, power, telecommunication, electronics, lighting and colour terms. Terms particular to telecommunications and electronics. Telephony Part 3, (15th November 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (138 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
3. Information technology. Local and metropolitan area networks. Token ring access method and physical layer specifications. Recommended practice for use of unshielded twisted pair cable (UTP) for token ring data transmission at 4 Mbit/s. (15th October 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (22 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
4. Private branch exchanges for connection to public switched telephone networks run by certain public telecommunications operators. Specification for general requirements Part 1, (15th February 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (40 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
5. Private branch exchanges for connection to public switched telephone networks run by certain public telecommunications operators. Specification for ports Part 4, (15th December 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (162 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
6. Private branch exchanges for connection to public switched telephone networks run by certain public telecommunications operators. Specification for private branch exchanges with terminating stations treated as an entirety Part 2, (15th February 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (32 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗