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Collection of Post Office Telegram and Telephone Papers

Collection of sales documentation and technical manuals relating to the BT Monarch Call Connect System digital PABX (private automatic branch exchange)

BT Connected Earth Collection

Technical manual: ‘Monarch 120 A, B and Compact Call Connect Systems, Man Machine Interface (MMI) Commands with Abbreviated Maintenance Information’

Sales leaflet: ‘The Monarch 120 Call Connect System’

Technical manual for use by prospective purchasers: ‘The Monarch 120 Call Connect System, Technical Description Part 2’

Technical manual, ‘Monarch Field Manual for BT field engineers’, Issue 1 April 1996, for the BT Monarch Call Connect system

Technical manual for use by prospective purchasers: ‘The Monarch 120 Call Connect System, Technical Description Part 1’

Technical Manual: ‘Monarch System User Guide’, Issue 1, for the Monarch Call Connect system

Sales information for the Plessey CDSS1