Attributions The files and metadata on this page have been mirrored with permission from The Telecom Archive. Bell System PracticesDivision211DescriptionNo. 1, 3, 5, and 6 Toll Offices, No. 1, 3, 5, and 6 Toll Switchboards and No. 6A Teletypewriter Switchboards Search Division: $attachmentPatent $attachmentPatent $attachmentPatent $attachmentPatent $attachmentPatent
