Reference / Paper · 1972
BSP 550-000-000: Division 550 (755A PBX) Numerical Index (1972)
Index of the Bell System Practices for the 755A PBX.
Reference / Paper · 1972
Index of the Bell System Practices for the 755A PBX.
BELL SYSTEM PRACTICES AT&TCo Standard SECTION 550-000-000 Issue 2, November 1972 NUMERICAL INDEX - DIVISION 550 755A PBX 1. GENERAL 1.01 Section Number This section provides on index of System-issued sections in Division 550. 1.02 A square 0 indicates a canceled item. Information relating to the cancellation, if necessary, will be shown in a note following the item. Canceled items and related notes will be deleted upon reissue of the index. 1.04 550-550 NO. 755" PBX 550-550- 110 General Description "Add" is the abbreviation for Addendum. This division is arranged in layers as follows: (see subdivisions) 550-550-210 4 Installation 550-550-230 2 Tests and Inspections at Time of Installation 550-550-500 2 Alarms - 550-550-590 2 link and link Allotter Circuits Tests INDEX Section Number 550-000 e ETL 550-001-011 LAYERS 2.01 3. Subject A bullet (e) indicotes on item that has been added or changed since the previous issue of the index. 1.03 2. e Issue Issue Subject Indexe5 and Equipment Ted Li5t 550-000-000 2 Operation Tests Numerical Index PBX Division 550 - Operation 755A 550-550-665 Trunks - Operation Tests SEE SECTION 460-000-006 - ALPHABETICAL INDEX FOR LOCATION OF ALL SECTIONS RELATIVE TO THE INSTALLATION AND MAINTENANCE JOB Printed in U.S.A. Page 1 1 Page