M-Series - Plant - TCI Library M-Series

]]> https://www.telephonecollectors.info/index.php/browse/document-repository/bsp-bell-system-practices-by-doc/bsp-categories-by-early-letter-code-by-doc/m-series-plant?format=html Thu, 03 Dec 2009 08:30:05 -0800 en-GB hourly 1 M25.75MT Add. IB-se https://www.telephonecollectors.info/index.php/browse/document-repository/bsp-bell-system-practices-by-doc/bsp-categories-by-early-letter-code-by-doc/m-series-plant/520-m25-75mt-add-ib-se?format=html M25.75MT Add. IB-se Addendum, Issue B, 1953-06-01

]]> https://www.telephonecollectors.info/index.php/browse/document-repository/bsp-bell-system-practices-by-doc/bsp-categories-by-early-letter-code-by-doc/m-series-plant/520-m25-75mt-add-ib-se?format=html Addendum, Issue B, 1953-06-01

]]> (Anonymous) M-Series - Plant Thu, 03 Dec 2009 08:30:05 -0800 M25.75MT IC-se https://www.telephonecollectors.info/index.php/browse/document-repository/bsp-bell-system-practices-by-doc/bsp-categories-by-early-letter-code-by-doc/m-series-plant/521-m25-75mt-ic-se?format=html M25.75MT IC-se Power Supply Arrangements - P.B.X.'s, Station Systems and Key
Equipments - General Requirements, Issue C, 1946-09-01

(Note: The MT isn't officially part of the BSP number but SE is using the
9-digit plant series method of numbering for clarity.)

]]> https://www.telephonecollectors.info/index.php/browse/document-repository/bsp-bell-system-practices-by-doc/bsp-categories-by-early-letter-code-by-doc/m-series-plant/521-m25-75mt-ic-se?format=html Power Supply Arrangements - P.B.X.'s, Station Systems and Key
Equipments - General Requirements, Issue C, 1946-09-01

(Note: The MT isn't officially part of the BSP number but SE is using the
9-digit plant series method of numbering for clarity.)

]]> (Anonymous) M-Series - Plant Thu, 03 Dec 2009 08:30:05 -0800