COIN, COLLECTING BOX
WIRING DIAGRAMS
P.O. ENGINEERING DEPT.
ENGINEERING INSTRUCTIONS
TELEPHONES
CALL OFFICES
D 3002
Issue 3, 25.1955

DIAGRAMS FOR PUBLIC CALL-OFFICES AND SUBSCRIBERS' COIN-BOX INSTALLATIONS

1. General
This Instruction lists in Tables 1, 2 and 3 the diagrams in current use.  Details of the apparatus are given in D 3001 and installation instructions in D 3003.  In the case of extension plans, the principle to be observed is to fit a coin-box at every station from which the exchange can be called.  For example, on magneto and C.B.S. systems, a coin-box should be fitted at all stations and, on automatic systems, a coin-box should be fitted wherever the telephone is provided with a dial.

2. Existing installations wired to obsolete diagrams
As opportunity offers, existing installations wired to obsolete diagrams should be converted to the appropriate standard diagram, since they will normally include obsolete equipment and will, therefore, be difficult to maintain.  All installation diagrams, other than those listed in this E.I., have been cancelled, and are now unobtainable.


TABLE 1
PUBLIC CALL OFFICES USING COIN-COLLECTING BOXES
(For Facilities, see A 3001)

Type of Circuit Call Office Plan Number N Diagram Number
Automatic C.B. CBS No. 1 CBS No's 2 & 3 Magneto
Except UAX No's 5 & 6 UAX No's 5 & 6
Direct Exchange Line 5A 2408 2407 2406 2410 2400 2409 (2403)
Telegram circuit and kiosk 5E 2448
2408*
4300*		 2448 (2598)
2407*
4300*		 2523
2406*
4300*		 2401
2410*
1296*		 2402
2409*
1297*		 2404
2409* (2403)
1297*
Telegram circuit and cabinet 5F 2412
2408*
4300*		 2412
2407*
4300*		 2412
2406*
4300*		 2655
2410*
1296*		 2705
2409*
1297*		 2755
2409* (2403)
1297*
Conversion C.B. to
Auto. (except U.A.X. Nos. 5 & 6 		5A 2413 - 2413 - - -
Postpayment on
C.B. converted from C.B.S. pending auto. conversion 		5A - - 2419 - 2419 -

Note 1 - Diagrams marked * are required in addition to the main Diagram.
Note 2 - Diagrams shown in brackets are still available for maintenance purposes.


TABLE 2
PUBLIC CALL OFFICES WITHOUT COIN-COLLECTING BOXES
(For Facilities, see A 3001)

Type of Circuit N Diagram Number
Automatic C.B. CBS No. 1 CBS No's 2 & 3 Magneto
Except UAX No's 5 & 6 UAX No's 5 & 6
1A - - 3801 3700 3700 3700
2A 4300 4300 4300 1296 1297 1297
2C 2417 (2418) 2417 (2418) 2417 (2418) 2635 2685 2411
2G 2415 - - - - -

Note - Diagrams shown in brackets are still available for maintenance purposes.


TABLE 3
STANDARD SUBSCRIBERS' INSTALLATIONS WITH COIN-COLLECTING BOXES (See A 3002)

Type of Circuit N Diagram Number
Automatic C.B. CBS No. 1 CBS No's 2 & 3 Magneto
Except UAX No's 5 & 6 UAX No's 5 & 6
Direct Exchange Line 2408 2407 2406 2410 2409 2409 (2403)
Extension Plan 1 4225 4245 4265 4075 4125 4025
Extension Plan 1A 4226 4246 4266 4076 4126 4026
Extension Plan 1B 4227 4247 4267 4077 4127 4027
Extension Plan 3 4228 - 4268 - - -
Extension Plan 5 4234 -   - - -
Extension Plan 7 & 7A 4235 - 4275 4085 4135 4035
Conversion C.B. to Auto (D.E.L.) 2413   2413      
Postpayment on C.B. Converted from C.B.S. pending automatic conversion     2419   2419  
P.A.B.X. & C.B. P.M.B.X. extensions 979 979 979 979 979 979
C.B.S. cordless switchboard. extensions       2405 2409 -
Magneto P.M.B.X. extensions           2409 (2403)

Note 1 - Diagrams shown in brackets are still available for maintenance purposes.
Note 2 - If an extension plan, other than those listed, has to be provided with coin-collecting boxes, the principle detailed in par. 1 must be followed. The case should be treated in the same way as nonstandard facility requests (see Stations, A 3901).

3. Other diagrams
Any applicable to coin-box circuits (wiring of mechanisms, bell-sets, etc.) are detailed in the "Index of 'N' Diagrams" which should be consulted as necessary.


 
 
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