SD-CD-65680-505-506-507-Switchboards - TCI Library https://www.telephonecollectors.info/index.php/browse/bruce-crawford-library/western-electric/sd-cd-65680-505-506-507-switchboards?format=html Fri, 22 Jun 2012 05:20:15 -0700 en-GB hourly 1 CD-65680-01 i12D - 507A, 507B PBX (cropped and OCRed) https://www.telephonecollectors.info/index.php/browse/bruce-crawford-library/western-electric/sd-cd-65680-505-506-507-switchboards/11174-cd-65680-01-i12d-507a-507b-pbx-cropped-and-ocred?format=html CD-65680-01 i12D - 507A, 507B PBX (cropped and OCRed) Issue 12D.  PBX Systems No. 507A and 507B Station Line, Trunk, Connecting, Telephone, Ringing, Buzzer and 2-way Ringdown Tie Trunk Circuits arranged for use with manual or dial central offices.

This contains a concise operational description for outgoing calls and incoming calls.

Contributed by John Novack.

]]> https://www.telephonecollectors.info/index.php/browse/bruce-crawford-library/western-electric/sd-cd-65680-505-506-507-switchboards/11174-cd-65680-01-i12d-507a-507b-pbx-cropped-and-ocred?format=html Issue 12D.  PBX Systems No. 507A and 507B Station Line, Trunk, Connecting, Telephone, Ringing, Buzzer and 2-way Ringdown Tie Trunk Circuits arranged for use with manual or dial central offices.

This contains a concise operational description for outgoing calls and incoming calls.

Contributed by John Novack.

]]> (Anonymous) SD-CD-65680-505-506-507-Switchboards Fri, 22 Jun 2012 05:20:15 -0700 SD-65680-01 i12 - 507A, 507B PBX https://www.telephonecollectors.info/index.php/browse/bruce-crawford-library/western-electric/sd-cd-65680-505-506-507-switchboards/11175-sd-65680-01-i12-507a-507b-pbx?format=html SD-65680-01 i12 - 507A, 507B PBX Issue 12.  Contributed by John Novack

]]> https://www.telephonecollectors.info/index.php/browse/bruce-crawford-library/western-electric/sd-cd-65680-505-506-507-switchboards/11175-sd-65680-01-i12-507a-507b-pbx?format=html Issue 12.  Contributed by John Novack

]]> (Anonymous) SD-CD-65680-505-506-507-Switchboards Fri, 22 Jun 2012 05:20:15 -0700 CD-65680-01 i13D - 507A, 507B PBX Circuit Descriptions Bc https://www.telephonecollectors.info/index.php/browse/bruce-crawford-library/western-electric/sd-cd-65680-505-506-507-switchboards/1433-cd-65680-01-i13d-507a-507b-pbx-circuit-descriptions-bc?format=html CD-65680-01 i13D - 507A, 507B PBX Circuit Descriptions Bc Issue 13D.  507A (3-CO trunk, 7-station) & 507B (5-CO trunk, 12-station) Cordless Common Battery PBXs.  Includes Description of Operation.

]]> https://www.telephonecollectors.info/index.php/browse/bruce-crawford-library/western-electric/sd-cd-65680-505-506-507-switchboards/1433-cd-65680-01-i13d-507a-507b-pbx-circuit-descriptions-bc?format=html Issue 13D.  507A (3-CO trunk, 7-station) & 507B (5-CO trunk, 12-station) Cordless Common Battery PBXs.  Includes Description of Operation.

]]> (Anonymous) SD-CD-65680-505-506-507-Switchboards Sun, 25 Jul 2010 08:31:56 -0700 CD-65733-01 507 Auto Tie Trunk Bc https://www.telephonecollectors.info/index.php/browse/bruce-crawford-library/western-electric/sd-cd-65680-505-506-507-switchboards/1434-cd-65733-01-507-auto-tie-trunk-bc?format=html CD-65733-01 507 Auto Tie Trunk Bc https://www.telephonecollectors.info/index.php/browse/bruce-crawford-library/western-electric/sd-cd-65680-505-506-507-switchboards/1434-cd-65733-01-507-auto-tie-trunk-bc?format=html (Anonymous) SD-CD-65680-505-506-507-Switchboards Sun, 25 Jul 2010 08:31:56 -0700 Div B Section 3 507A Page 5 Bc https://www.telephonecollectors.info/index.php/browse/bruce-crawford-library/western-electric/sd-cd-65680-505-506-507-switchboards/1435-div-b-section-3-507a-page-5-bc?format=html Div B Section 3 507A Page 5 Bc https://www.telephonecollectors.info/index.php/browse/bruce-crawford-library/western-electric/sd-cd-65680-505-506-507-switchboards/1435-div-b-section-3-507a-page-5-bc?format=html (Anonymous) SD-CD-65680-505-506-507-Switchboards Sun, 25 Jul 2010 08:31:56 -0700 Ringdown Tie Trunk Ideas Bc https://www.telephonecollectors.info/index.php/browse/bruce-crawford-library/western-electric/sd-cd-65680-505-506-507-switchboards/1436-ringdown-tie-trunk-ideas-bc?format=html Ringdown Tie Trunk Ideas Bc https://www.telephonecollectors.info/index.php/browse/bruce-crawford-library/western-electric/sd-cd-65680-505-506-507-switchboards/1436-ringdown-tie-trunk-ideas-bc?format=html (Anonymous) SD-CD-65680-505-506-507-Switchboards Sun, 25 Jul 2010 08:31:56 -0700 SD-65680-01 i13 - 507 PBX Schematics Bc https://www.telephonecollectors.info/index.php/browse/bruce-crawford-library/western-electric/sd-cd-65680-505-506-507-switchboards/1437-sd-65680-01-i13-507-pbx-schematics-bc?format=html SD-65680-01 i13 - 507 PBX Schematics Bc Issue 13.  507A (3-CO trunk, 7-station) & 507B (5-CO trunk, 12-station) Cordless Common Battery PBXs

]]> https://www.telephonecollectors.info/index.php/browse/bruce-crawford-library/western-electric/sd-cd-65680-505-506-507-switchboards/1437-sd-65680-01-i13-507-pbx-schematics-bc?format=html Issue 13.  507A (3-CO trunk, 7-station) & 507B (5-CO trunk, 12-station) Cordless Common Battery PBXs

]]> (Anonymous) SD-CD-65680-505-506-507-Switchboards Sun, 25 Jul 2010 08:31:56 -0700