Manual / Guide · 1960
BSP 550-550-210: 755A PBX, Installation (issue 4, 1960)
Installing the 755A PBX; lists its circuit drawings.
Manual / Guide · 1960
Installing the 755A PBX; lists its circuit drawings.
SECTION 550-550-210 Issue 4, August, 1960 AT&TCo Standard BELL SYSTEM PRACTICES Plant Series INSTALLATION 755A PBX CONTENTS CONTENTS (Cont'd) PAGE 1. GENERAL PAGE 27 5. PLACING IN SERVICE . 2. APPARATUS 2 Tools Gauges. Material 2 2 3 3. PREPARATION 3 Planning Selecting Location for PBX. Transporting PBX 4 5 5 5 Locating Copper Oxide Rectifier . Locating Ringing Generator Locating Miscellaneous Equipment . 5 5 5 Unpacking and Placing PBX in Position. Placing Cross-Connecting Terminal . Cabling Between Cross-Connecting Terminal and PBX (A) Cable Entrance at Top of PBX. (B) Cable Entrance at Bottom of PBX Connections at PBX Terminal Strips in Lieu of Cross-Connecting Terminal Installing PBX Battery . Installing Fuses for CO Battery Charging Feeders. Installing Rectifier for Charging PBX Batteries Use of Building Battery to Supply Power to PBX. Installing Generator Lettering and Numbering . 5 5 6 27 28 28 28 Miscellaneous Work Items. (A) Connections on CS (Class of Service) Terminal Strips . (B) Station Line Hunting (C) Vacant Terminals (D) Tie and Recorded Telephone Dictation Trunks (E) Connections for Emergency Trunk Key. (F) Miscellaneous Circuit Modifications (G) Touching Up External Finish of PBX 3 3 Cross-Connecting Terminals Selecting Cables . Locating Power Supply for Trunk Lamps 4. REQUIREMENTS AND METHODS. Checking Central Office Charging Conductors Placing Battery on Charge. (A) Cable Pair Charging (B) Rectifier Charging . 28 28 28 28 28 31 31 31 31 6. INSTALLAnON TESTS 1. GENERAL This section covers general requirements and methods to be followed in preparation and installation of the 755A PBX. 1.01 20 20 20 20 26 27 27 27 27 27 This section, replacing Section B556.015, has been reissued for the following reasons: 1.02 (a) To incorporate information previously covered in Section B556.014, on the preparation for installing the 755A PBX which has been cancelled. (b) To provide a detailed method for installing ac power to supply lamps in illuminated key telephone sets. (c) To cover the use of even count cable. © American Telephone and Telegraph Company, 1960 Printed in U. S. A. Page 1 SECTION 550-550-210 (d) To revise the information on supplying power to the PBX. (e) To bring the section up to date generally. Since this reissue covers a general revision, arrows ordinarily used to indicate changes have been omitted. The use of illuminated key telephone sets has increased the power demand to a point where, in some installations, the PBX battery is not adequate. A PBX using a local building battery for power will not have this problem. 1.03 When the PBX battery is found to be inadequate in providing power for operating both the PBX and trunk lamps, provide transformers and control equipment to operate trunk lamps to relieve excessive drain on the battery. 1.04 Generally new installations having up to 40 trunk lamps, or larger installations with an expected low to medium traffic volume, will have sufficient PBX battery reserve to supply power to the lamps. 1.05 New installations of more than 40 trunk lamps or with an expected high traffic volume may be provided with transformers to furnish power to the lamps to supplement the PBX battery. 1.06 When transformers are being provided as a source of power for the lamps and it is known that frequent service interruptions resulting from commercial power failure will be experienced or where even infrequent service interruptions resulting from commercial power failure cannot be tolerated by the customer, it is recommended that primary appearances of trunk lamps be supplied power from PBX battery. 1.07 Throughout this section common work operations such as cabling, wiring, mounting of equipment, etc, should be performed in accordance with the Bell System Practices applicable. Consult individual series indexes for specific section numbers of work operations desired. 1.08 Following is a list of circuit drawings pertaining to the PBX. Detailed circuit description will be found in associated CD sheets. Drawings for optional equipment that may be required must be ordered separately. 1.09 Page 2 Title Drawing Central Office Trunks SD-66503-01 Line, Line Switch, and Call Allotter SD-66504-01 Tone, Ringing, Alarm, and Common Timing Circuit SD-66506-01 Station Circuit *SD-66507-01 Tie Trunk - Outgoing Dial Selected, Incoming Dial Repeating *SD-66600-01 Tie Trunk - 2-way Dial Repeating *SD-66601-01 Tie Trunk - 2-way Ringdown Without Lamps *SD-66605-01 Tie Trunk - 2-way Ringdown With Lamps *SD-66606-01 Link and Link Allotter SD-66611-01 Recorded Telephone Dictation Trunk *SD-65788-01 Charge and Discharge Circuit SD-80588-01 Ringing Circuit - KS-5523 Ringing Machine *SD-80750-01 * Drawings not furnished with equipment. 2. APPARATUS Tools In addition to the standard tools necessary for PBX installation work the following tools or their equivalent are required: 2.01 R-2512 Wrench (adjustable) or equivalent. Test Receiver, No. 716C Receiver attached to a W2AB Cord equipped with two No. 360A Tools (No. 2W21A Cord), one KS-6278 Connecting Clip, and one No. 411A (Test Pick) Tool. Cords, test, Weston Electrical Instrument Co. Nos. D-79650 (red, 6 ft. with pick), D-79651 (black, 6 ft. with pick), and two 168023 (red, 10 ft. with clip). Gauges Volt-Ammeter, DC, Weston Model No. 281, 60-30-3 volts and 15-3-0.3 amperes or an equivalent meter. 2.02 ISS 4, SECTION 550-550-210 Material Any material which might be required for protecting the customer's premises or PBX during installation shall be provided. 2.03 Permission shall be obtained from the property owner or his agent when it is necessary to make attachments to surfaces such as wood panels, glazed tile, marble, etc. 3.06 The customer shall supply suitable 110120V, 50-60-cycle ac power wiring and convenience outlets not controlled by a switch when an ac power source for equipment is required. 3.07 2.04 Petrolatum, to protect the hands when handling batteries. 2.05 The following touch-up colors are to be used when necessary: (a) No. 10635 satin gloss enamel - Selecting Location for PBX Martin Senour Paint Co., Chicago, Ill.: For the outside surfaces of the metal casing. Select a location that will meet with the customer's approval and the following general requirements: (b) KS-8662 gray enamel: For discolored, faded or damaged surfaces on the inside. (a) Floor strong enough to support the PBX, which weighs approximately 450 pounds when fully equipped. (c) WL-58751 acid resistant light gray (b) Reasonably well lighted. enamel: For the battery trays. 3.08 (c) Adequate ventilation. 3. PREPARATION Planning Consider the surroundings of the quarters in which the PBX, associated equipment, and cross-connecting terminal (if required) are to be installed; particularly where cable splicing, etc, is necessary. 3.01 (d) Accessible without difficulty. If location is in an area which will normally be locked, suitable arrangements for access for maintenance purposes should be made with the customer. (e) Dry and reasonably clean. (f) As near as possible to the wire center. 3.09 Assist the customer in selecting locations for the PBX, telephone sets, extension bells, control keys for keyless stations, trunk emergency keys, lamp indicators, etc. 3.02 When lamp indicators are to be provided, care should be taken to select locations for indicators where visibility of signals will not be adversely affected by natural or artificial light. 3.03 When conduit for installations is to be provided, close cooperation is required with the customer or his agent in order that conduits of suitable size and location will be installed. 3.04 When necessary, discuss with the customer proposed route and methods of attaching cables and wiring to building walls, baseboards, etc. 3.05 Avoid locations: (a) Near windows, skylights, etc, where rain might enter. (b) Near sweating water pipes, steam pipes, sprinkler systems, etc. (c) Subject to extreme heat or cold. (d) Near a hoist, stairway, trap door, pit, moving machinery, etc. (e) In passageways used by trucks or other locations where traffic is heavy. (f) Where oil mist from machinery, dust, corrosive fumes, exhaust from steam vents, etc, are present. (g) Subject to excessive vibration due to operation of machinery or other causes. (h) Requiring use of a ladder when performing work in the terminal. Page 3 SECTION 550·550·210 3.10 Clearance for bringing the PBX through doorways, passageways, etc, is essential. Approximate dimensions of the PBX, when crated, are: height 80 inches, width 33 inches, depth 24 inches; and, when uncrated, the approximate dimensions are: height 72 inches, width 24 inches, depth 18 inches. eyebolts are provided in the top of the PBX to assist in handling when the packing case has been removed. These eyebolts may be removed from the holes in the top of the PBX and screwed into holes provided in the side of the framework when such a location facilitates handling. Note: On some PBX the eyebolts may be removed after the PBX is finally located and stored by inserting them in threaded holes provided in the lower compartment of the PBX. See Fig. 11. After removal of the eyebolts fill the holes with No. 33B apparatus blanks (rated manufacture discontinued) or four 1/2-13 x 1" RHM screws. 3.11 The PBX cabinet requires a floor space of not less than four feet wide and five feet deep to permit removal of front and rear casing and provide easy access to the equipment. A minimum ceiling height of six feet one inch is required. See Fig. 1. • ~ 1 31 :rt6" I- 2' -6" but not less than l' -S" from Wall or other O.bstruction :e lit t f~me"o 2S" (Approx.) n A.. t- Dimension 8 IS" (Approx.) ~ ~ 1 2' ·6" but not less than 1'· S" from Wall or other Obstruction Y2" Holes in Wood Base (for fastening P. B.X. to floor if desired) ~ Dimension A may be a minimum of 3" from wall or other obstruction if dimension B is at least l' S" or vice versa. Fig. 1 - Floor Plan Transporting PBX 3.12 Handle the PBX in the packing case wherever possible. When it is necessary to handle the PBX unpacked, do not attempt to lift by the handles on the casings since these are not designed to support the weight of the PBX. Two Page 4 3.13 Use a roller dolly whenever possible to avoid carrying. Due to the height of the PBX care should be exercised when handling it upright to avoid tipping it over. The strength of the packing case is sufficient so that the packed PBX can be laid on its narrow side and moved by means of a roller dolly. ISS 4, SECTION 550-550-210 3.14 When necessary to carry the PBX, particularly up or down stairs, take precautions to avoid personal injury as the PBX weighs approximately 500 pounds in the packing case. battery voltage to approximately 10 volts. Resistors for 100 lamps are provided on a mounting plate (J58819M-L1 Resistance Unit) and are to be mounted in the PBX cabinet. Handle PBX carefully to avoid injury to equipment such as might result from heavy jarring. Also take precautions not to damage the walls or floors of the building while moving the PBX. When the source of power for the lamps is to be supplied from transformers, locate associated key telephone units in PBX terminal, an apparatus cabinet, or apparatus boxes. Locate transformers and key telephone units as close as practicable to the cross-connecting terminal and ac service. 3.15 Cross-Connecting Terminals Binding post chambers, appropriate connecting blocks or house terminals shall be used to terminate cables from the PBX. 3.22 3.16 Locating Copper Oxide Rectifier 3.17 Refer to Division Index 169-000-000 when a rectifier is to be provided for PBX battery charging. Refer to Fig. 2 or 6 for a typical installation with a J86205B, L3 or L4 rectifier. Selecting Cables Locating Ringing Generator 3.18 Use Section 461-450-101 as a guide in selecting type of cable best suited for a particular installation. 3.24 Where lamp indicators and/or illuminated key telephone sets receive their power from battery, the ultimate number of cable pairs required between PBX cabinet and cross-connecing terminal are 200 and 125 pairs for 20- and 10-line installations respectively. Locating Miscellaneous Equipment On installations requiring a cross-connecting terminal box, locate cable terminal sections generally in accordance with 3.08. 3.19 Where lamp indicators and illuminated key telephone sets receive their power from transformers and the associated key telephone units are located at or near the cross-connecting terminal or where lamp indicators receive their power direct from the PBX battery and the ill uminated key telephone sets receive their power from transformers, the ultimate cable requirements between PBX cabinet and crossconnecting terminals are 150 and 100 pairs for 20- and 10-line installations respectively. In addition, a 16-pair cable is required between associated key telephone units and cross-connecting terminal. 3.20 3.23 A KS-5585, or equivalent, static ringing generator may be provided to furnish 20-cycle ringing current in lieu of CO ringing when there is a shortage of cable facilities or no CO ringing is available. Locate the generator as close as practicable to PBX cabinet or crossconnecting terminal and ac service. See Fig. 2 or 6, and Division Index 163-000-000. Optional equipment such as tie trunks, etc, may be mounted in the PBX cabinet if space is available, otherwise mount equipment units in a separate apparatus cabinet located near the PBX. 3.25 When tie-trunk equipment is to be installed in the PBX, collars should be placed on the mounting screws to recess the mounting plate sufficiently to permit proper closing of the cabinet. The collars are furnished with the trunk equipment. 3.26 4. REQUIREMENTS AND METHODS Locating Power Supply for Trunk Lamps Unpacking and Placing PBX in Position When the source of power for illuminated key telephone sets is dc, a 290-ohm resistance is required for each lamp to drop the PBX 3.21 4.01 Remove the packing case, leaving only the skids under the PBX. Page 5 SECTION 550-550-210 Place PBX in location selected which should, in general, be in accordance with information in the job preparations. 4.02 Remove the 4 lag screws running through the base to the skids and remove skids by tilting PBX slightly. Do not remove wooden base provided to insulate the PBX from ground. 4.03 Check by eye to see that the PBX stands approximately level. This can most readily be done by aligning vertical parts of the PBX framework (with casings removed) with other vertical objects on the premises. Shim the base with small st'rips of wood if necessary. 4.04 4.08 An arrangement for de lamp supply (20line PBX) using binding post chambers or connecting blocks, whose binding posts are arranged as those in binding post chambers, is shown in Figs. 2 and 3. Refer to Table A for connections. 4.09 Arrangements for de lamp supply (20-line and 10-line PBX) using connecting blocks are shown in Figs. 4 and 5, respectively. Refer to Table A for connections. 4.10 An arrangement for ae lamp supply (20line PBX) using a combination of binding Holes are provided in the base to fasten the PBX to the floor, if desired. Use fasteners as required for the particular type of floor. post chambers and connecting blocks is shown in Figs. 6, 7, and 8. Refer to Table A, (cable pairs 1 to 150), and Table B for connections. Provide one 17B-KTU per trunk and wire as shown in Figs. 8, 9, and Table B. Placing Cross-Connecting Termina.1 4.11 4.05 Place terminal box, when required, in the location selected, which should, in general, be in accordance with information in the job preparations. 4.06 Binding post chambers or connecting blocks may be placed in new or, if space has been provided, in [n existing terminal box. 4.07 Page 6 In addition to 4.10, to provide a primary appearance of dc lamps, if they are required (see Paragraph 1.07) refer to Fig. 8 and Table B. Use 22-KTU's (one unit will provide for three trunks), and refer to Figs. 6, 8, and Table B. When an existing installation is modified to use illuminated key telephone sets refer to 4.08 through 4.11. 4.12 ISS 4, SECTION 550-550-210 PBX TERMINAL 755A PBX 200 Pro In Cable lSi TS "BII lSi lSi lSi o 0 o 0 o 0 o 0 o 0 o 0 o 0 o 0 lSi lSi Line, Lin k, And Switch Equip. Resistors Power Equipment a Storage Batte ry Compartment lSi J86205BType Rect ~ 110V AC Supply ~ ~0 K-5585 Ring Gen. Fig. 2 - Typical Arrange ment of 20-Line PBX - Lamp Power from PBX Page 7 SECTION 550·550·210 \ STA 20 R T 0 0 b4 b3 0 L ~ 0 K 0 H 0 0 0 0 0 0 21 0 0 0 0 0 10 0 0 0 0 0 22 0 0 0 0 0 IS 0 0 0 0 0 0 20 0 0 0 0 0 24 0 0 25 0 0 0 0 0 0 0 0 0 30 0 0 0 0 0 0 35 0 0 0 0 0 27 0 0 40 0 0 0 0 0 0 29 0 0 45 0 0 0 0 0 0 0 60 0 0 50 0 TRK 2 f-- 0 0 0 0 0 0 0 0 0 0 31 TRK 4 - 8ATT l GNO GEN 73 0 COM RING, GRP I C81 81 0 0 0 0 0 0 85 0 0 0 0 0 88 0 0 0 90 0 91 0 0 92 0 93 0 94 0 95 0 96 0 0 0 0 0 0 97 0 98 0 0 0 0 99 100 0 0 0 0 0 I-- 0 0 121 0 0 0 0 0 0 0 0 0 COM RING GRP C82 0 0 35 0 COM RING GRP C83 0 0 0 0 0 0 0 CONT KEY 37 CONT T t CONT .. 0 0 0 0 0 0 0 , 0 0 LP GRO CONT 38 KEY GRD 0 0 141 0 0 2' 20 TEL 0 - 0 0 SET LP GRO 39 38 RECT 0 0 PU kEY ORO 0 39 0 0 I--- 0 0 0 161 0 0 0 -20 0 0 0 0 0 0 o 166 0 0 0 LI TRK 2 0 0 0 0 0 0 171 0 39 ~ 21 20 0 0 0 0 0 0 o 176 0 0 o 150 0 0 0 0 0 0 0 LI TRK 3 0 0 0 0 0 0 0 o 181 0 0 0 0 o 186 0 0 LI TRK 4 0 0 0 0 3. 0 --;;- 0 o 191 0 0 0 20 0 0 0 39 38 t----z1 0 0 0 0 0 0 0 o 196 38 20 LOCAL STA L1Hf LP BAn 0 0 0 0 0 0 o 200 For a 20 line installation use 2 -100 pair binding post chambers. For a 10 line installation use a 100 pair and a 50 pair binding post chamber. Terminate station lines as shown for stations 20 to 29. Pair numbers not to be stamped. Fig. 3 - Arrangement of Binding Post Chambers - Lamp Power from PBX Page 8 39 3B t-~ 0 0 0 f-- LI TRK 1 0 0 0 0 I--- 0 0 0 STA LINE LPS 0 0 131 0 0 0 36 0 156 0 0 0 I-- 0 0 0 0 f-- 0 0 0 34 0 0 0 0 MACH 72 0 0 0 0 RING 0 0 0 0 71 0 77 0 111 0 0 0 K 0 0 0 0 0 0 K V 0 L 0 21 20 0 0 0 33 151 0 0 0 I-- 0 4 0 0 32 I I 0 0 0 / 0 0 AlM 0 0 0 0 0 0 H 70 0 69 0 0 0 0 0 0 G AlM BEll AlM 0 0 0 0 TRK 3 0 6B 0 0 0 0 0 0 0 1 3 0 0 63 0 0 R 0 I 0 101 2 0 0 0 0 0 0 0 30 0 0 0 28 0 0 0 0 0 0 TRK I 0 0 0 0 0 57 0 0 0 26 0 0 0 0 25 0 0 0 STA 54 0 0 0 0 0 0 0 0 0 0 0 0 23 R T 51 0 L 0 0 L 0 L2 0 LI - 0 39 38 f-- ISS 4, SECTION 550-550-210 Fanning Strips fConn. Blocks7 5TA 20 r-o----'-..., OfRO 01 20 0 3 40 Oc OH LO KO O 21 22 1 2 3 4 5 6 7 8 o o o 0 o 0 9 o 0 10 oo 00 II o 0 12 o 0 13 o 0 14 o 0 o 0 o 0 23 24 15 16 17 0 18 0 19 0020 0 21 o o o o 0 22 0023 0 24 O 25 o 25 OT RO 01 20 03 0 OG 4 LO OH KO o 26 27 o 0 0 o 0 o 0 o 0 o 0 o 0 o 0 o 0 o o o 28 29 0 0 o 0 o o 0 0 0 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 o 45 o 0 46 o 0 47 o 0 48 0 49 O o 50 51 52 53 o 5\ o 0 55 o 0 56 57 o 0 58 o 0 59 o 0 60 o 0 61 o 0 o 0 62 o 0 63 o 0 64 o 0 65 o 0 66 o 0 67 o 0 68 o 0 69 o 0 70 o 0 71 o 0 72 o 0 73 o 0 74 o 0 75 0 76 0 71 0 0 0 0 0 0 0 0 0 0 0 0 0 78 79 80 81 82 83 e4 85 86 87 88 89 90 91 92 93 94 55 56 97 98 95 100 5TA OfRO OL LO QLI L20 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 30 TRK 2 TRK 3 31 TRK 4 BATT 32 33 co ALM RING MACH GEN COM RING GRP 34 CB1 COM RING GRP CB2 COM RING GRP CB3 STA LINE LPS C T KEY 35 36 37 0 0 0 0 0 0 0 0 0 0 38 CRO 39 38 3. RECf OT RO 01 20 3 0 40 OG LO OH KO 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o o o o o o o o o o o o o o o o o o o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1ill 151 102 152 153 103 104 105 106 107 108 109 llO III 112 113 114 115 ll6 117 ll8 ll9 120 121 122 123 124 125 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 126 176 0 127 128 129 130 117 0 0 0 0 0 0 131 178 179 ISO 181 182 183 184 185 186 187 132 133 134 135 136 137 138 139 140 141 142 143 144 188 189 190 191 192 193 194 145 146 147 195 196 197 148 149 150 198 195 200 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 20 0 0 0 0 0 0 0 0 0 2' II TRK 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 II TRK 2 38 3'20 21 II TRK 4 38 39 20 21 LOCAL STA LINE lP BATT 38 39 Use Cables of proper size to give 200 pairs to P. B. X term. strips A and B. Pair numbers not to be stamped. Fig. 4 - Arrangement of Connecting Blocks - 20-Line Size - Lamp Power from PBX Page 9 SECTION 550·550·210 \10 Fanning Strips or Adapters Sl C nn. Block STA 20 21 22 23 24 OT 01 RO 20 03 OG 40 OH LO o KO o 0 o 0 o 0 o 0 o 0 o 0 o 0 o 0 o 0 o 0 o 0 o 0 o 0 o 0 o 0 o 0 o 0 o 0 o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 26 2 3 27 7 28 29 30 31 32 8 33 9 34 35 36 37 38 39 40 41 42 43 4 S 6 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 101 102 103 104 105 106 44 45 46 47 48 49 50 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5TA 25 TRK 2 26 TRK 3 TRK 4 27 i BATT AND 28 29 OT RO OLLO oOLll2 0 o 0 o 0 o 0 o 0 o 0 o 0 o 0 o 0 o o o o o o o o o o o o o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 51 52 S3 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Use Cable to give 125 pairs to P B. X. term. strips A and B. Pair numbers not to be stamped. 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 Fig. 5 - Arrangement of Connecting Blocks - 10·Line Size - Lamp Power from PBX Page 10 CBI COM RING GRP CB2 COM RING GRP CB3 STA LINE lPS CONT KEY CONT 1 C0 NT 2 TRK lP CONT KEY PU KEY 20 TEL SET lP GRO 28 2. REef ISS 4, SECTION 550-550-210 PBX TERMINAL 100 Pr. BP Chamber 50 Pro BP Chamber 755A PBX -- --------, Conn. Blocks TS liB II Key Telephone Units o 0 o 0 Line, Link, And Switch Equip. OS> See Note 1 (S) 105 Type App Box TS ''A" o E» o 0 0 (S) -++-_-+_--.J _ L - -_ _ 16Pr. In r--J-a-62-0-5-B-----, Co ble Type Rect Power Equipment 8 Storage Battery Comportment NOTES: K-5585 Ring Gen. See Note 2 110V AC I Supply : II II 393B Trans I I ~ I I I I ~--3--'~---;~~--" I. :~.Jtj ----i, -r t I:!S iL r'" I 110 V AC Supply I I ...J 1. Provide two 22H K TU when primary appearances of DC powered lamps is required. See Paragraph 4.11 2. Provide one 393 B transformer for 72 lamps or less. Wiring between transformer secondaries and 21 A KTU fuses must be 20 GA or larger copper. 3. Key Telephone Units may be mounted in the PBX terminal, space permitting. Fig. 6 - Typical Arrangement of 20-Line PBX - Lamp Power from Transformers Page 11 SECTION 550-550-210 STA R T 0 0 2 0 4 0 L 0 K 0 1 20 0 3 0 G 0 H 0 0 0 0 0 21 a 0 0 0 0 10 0 0 0 0 22 0 0 0 0 0 15 0 0 0 0 0 23 0 0 0 0 0 0 o 20 0 0 0 0 24 0 0 0 0 0 0 a 25 0 0 0 25 0 0 0 0 0 0 0 30 0 0 0 26 0 0 0 0 0 0 0 27 0 0 0 0 0 28 0 0 29 35 0 a 0 0 0 0 40 0 0 0 0 0 0 45 0 0 0 0 0 0 0 0 0 0 50 R T 0 0 51 L L 0 0 L2 a 54 a 0 a 0 a 0 a 57 0 0 a a L1 STA ~ 101 TRK I 0 1 30 TRK 2 0 0 60 0 a o 72 0 o 73 0 0 a 0 0 0 0 0 0 0 0 770 a 0 0 0 0 81 0 0 0 0 0 0 0 0 o a 0 630 0 0 0 0 0 0 0 0 0 680 0 069 a o 70 0 o 71 0 a 0 a 850 0 0 o 88 0 a 0 900 0 0 91 0 920 0 0 93 a 940 0 0 95 a 960 0 970 0 a 98 a 0 99 a 0 '00 a 32 BATT II GRO BEll ALM KEY 0 0 0 33 co ALM ..... CH GEN 34 COM RI NG GRP CBl COM RING GRP C83 CONT KEY CONT STA i CONT TRK 1 20 30 L1 29 TRK 2 20 30 L1 29 39 STA Z TAlC INO LP GRD CONT KEY GAO PU ,0-2' AC 20 HL SET L' LG KEY GAO GRD LG 38-39 RECT Use a IOOpair and 50pair binding post chamber, appropr iate type conn blocks, and fanning str ips Terminate station lines as shown for stations 20 to 29. Pair numbers not to be stamped. 0 0 0 0 111 0 a 0 a 0 0 0 0 0 0 '210 0 0 0 0 0 0 0 0 '25 a 0 0 0 39 a 1310 a 0 0 0 a 0 36 0 0 a 136 a 0 a 0 0 0 0 a 37 0 141 0 o 0 a a a 0 0 0 38 0 146 a o 0 0 0 0 a a 150 a 39 0 AC LP 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 0 0 0 0 0 0 0 15 0 0 0 0 0 0 0 0 0 0 200 0 0 0 0 0 0 0 025 0 0 o 260 0 0 0 0 0 0 0 300 0 0 0 0 0 0 0 0 0 350 0 0 0 0 0 0 0 0 0 400 o 0 0 0 0 0 0 0 0 45 o 0 0 0 0 0 0 0 0 0 50 0 TRK 3 20 30 1I 29 30 TRK 4 20 30 1I 29 39 DC LP TRK I 2 3 4 GRD 12 PAIR CABLE TO KTU FIG.10 Note: Pair numbers not to be stencilled. Pairs 40 to 45 spare Fig. 7 - Arrangement of Binding Post Chambers and Connecting Blocks 20-Line PBX - Lamp Power from Transformers Page 12 35 0 AC LP 39 STA 1I NE LPS 0 0 0 RING COM RING GRP C82 0 0 ALM 0 0 a 0 TRK 4 K 0 0 a 31 a a 0 TRK 3 SfA o 126 ~ 0 4 0 L G 0 H 0 o a <3 R '? ISS 4, SECTION 550-550.210 Fanning Strips - - - - AC AC Connecting Blocks lP lP GRO 26 TRK TRK 1I 1I 20 20 30 30 1I 1I 29 29 39 39 GRD TRK TRK 1I 1I 20 20 30 1I 29 30 1I "S" Bonding Ribbon 29 39 39 0 400 0 0 0 AC 20 0 0 0 0 0 0 450 l 1I DC lP TRK I l 1I lG 1I lG lG 33 GRD ----Wire Strops Note: Pair numbers not to be stencilled. Pairs 40 to 45 spore Fig. 8 - Wiring of Connecting Blocks from 17B KTULamp Power from Transformers and DC Power for Primary Appearance of Lamps Page 13 SECTION 550-550-210 FIG A RELAY CONTROL FIG. B 9-11 V AC SUPPLY To Other Units as Required 178 KEY TEL UNIT AC To Fig. 3938 TRANSFORMER A:y 5 LI COtH:CTS TO 110-125 V 50-60/11 AC SUPPLY To Fig. 8 G LG 20 GA or Larger If Fig. C is Furnished See Note 3 G Provide Strap Unless KTU is Served By More Than One Tr<JlSformer FIG. C FUSE MOUNTING 21A KTU r---<1ltu>1_~liI.L }TO 1st and T, Fi =t-Joo--<l B 20 GA or Larger See Note 3 2nd Fig. A I }TO 2nd and 3rd Fig. A NOTES 1. Furnish one Fig. A per Trunk. 2. Furnish one Fig. B with Fig. A if not more than 36 Lamps ore required. Furnish one Fig Band C with Fig. A if not more than 72 Lamps are required. If more than 72 Lamps are required provide additional Figs. Band C. 3. Wiring between Figs. Band C must be 20 GA or larger Copper. 4. Fuse Fig. B with 2 Amp fuses when Fig. C is provided. 5. Connect the transformer secondary as follows: LINE VOLTAGE CONNECT "AC LEAD TO 110 V 115 V 120 V 125 V A A B B Fig. 9 - AC Lamp Supply Control Circuit Page 14 II CONNECT 1'(;11 LEAD TO D C D C ISS 4, SECTION 550-550-210 TABLE A TERMINATION OF CABLE PAIRS BETWEEN CROSS-CONNECTING TERMINAL AND PBX TERMINAL STRIPS A AND B CABLE PAIR NOS. TERMINATIONS AT CROSS· CONNECTING TERMINAL TERMINATIONS AT PBX TERMINAL STRIP A TERMINATIONS AT PBX TERMINAL STRIP B NOTES 1-50 101-150 1-50 101-150 Station Lines 20-29 51 52 53 51 Trk 1 52 Lamp Bat Trk 1 53 L1 & L2 Trk 1 Trk 1 (T & R) Tip on 1, Ring on 7 Tip on 12, Ring on 6 54 55 56 54 Trk 2 55 Lamp Bat Trk 2 56 L1 & L2 Trk 2 Trk 2 (T & R) Tip on 2, Ring on 8 Tip on 24, Ring on 18 57 58 59 57 Trk 3 58 Lamp Bat Trk 3 59 L1 & L2 Trk 3 Trk 3 (T & R) Tip on 3, Ring on 9 Tip on 36, Ring on 30 60 61 62 60 Trk 4 61 Lamp Bat Trk 4 62 L1 & L2 Trk 4 Trk 4 (T & R) Tip on 4, Ring on 10 Tip on 48, Ring on 42 63 64 65 66 67 63 64 65 Batt & Grd 66 67 Tips on Grd Lugs 1 to 5 68 69 70 71 72 68 Alarm Bell 69 Alarm Key 70 CO Alarm 71 Loc Ring Mach 72 Generator Tip on 24, Ring on 27 Tip on 6, Ring on 30 Tip on 35, Ring on 36 Tip on 6, Ring on 60 Tip on 13, Ring on 25 73 74 75 76 73 CB1 74 Common Trk 75 Ringer Grp 76 Trk 1 Ring on 13 Trk 2 Ring on 14 Trk 3 Ring on 15 Trk 4 Ring on 16 Tip on 13 Tip on 13 Tip on 14 Tip on 14 4 77 78 79 80 CB2 77 78 Common Trk 79 Ringer Grp 80 Trk 1 Ring on 25 Trk 2 Ring on 26 Trk 3 Ring on 27 Trk 4 Ring on 28 Tip on 15 Tip on 15 Tip on 16 Tip on 16 4 Station Lines 30-39 1 2 1 2 1 2 Rings on Batt Lugs 50 to 54 or 52 to 56 3 Page 15 SECTION 550-550-210 TABLE A - Continued CABLE PAIR NOS. TERMINATIONS AT CROSSCONNECTING TERMINAL TERMINATIONS AT PBX TERMINAL STRIP A TERMINATIONS AT PBX TERMINAL STRIP B NOTES Tip on 17 Tip on 17 Tip on 18 Tip on 18 4 81 82 83 84 81 CB3 82 Common Trk 83 Ringer Grp 84 Trk 1 Ring on 37 Trk 2 Ring on 38 Trk 3 Ring on 39 Trk 4 Ring on 40 85 86 87 85 Sta Line Lam ps 86 Sta Line Lamps 87 Sta Line Lamps Tip on 17, Ring on 23 Tip on 29, Ring on 35 Tip on 41, Ring on 47 88 88 (Control KeyLeads 5 & 6) 89 (Control KeyLeads 7 & 8) 90 (Controlled Sta #1Leads Sw & A) 91 (Controlled Sta #2Leads Sw & A) Tip on 39, Ring on 40 92 93 94 92 Grd for Trunk Lamp 93 Grd for Control Key 94 Grd for Pick-up Key Tip on 9, Ring on 10 Tip on 12, Ring on 12 Tip on 7, Ring on 7 95 96 97 98 99 95 LG for Sta 20-23 96 LG for Sta 24-27 97 LG for Sta 28-31 98 LG for Sta 32-35 99 LG for Sta 36-39 Tip on 19, Ring on 20 Tip on 21, Ring on 22 Tip on 23, Ring on 28 Tip on 29, Ring on 33 Tip on 34, Ring on 41 100 100 Rectifier Tip on 11, Ring on 49 89 90 91 CABLE PAIR NOS. TERMINATIONS AT CROSS. CONNECTING TERMINAL 151 152 153 154 155 151 Trk 1 L1 Lead for Sta 20 & 21 152 Trk 1 L1 Lead for Sta 22 &, 23 153 Trk 1 L1 Lead for Sta 24 & 25 154 Trk 1 L1 Lead fa!" Sta 26 & 27 155 Trk 1 L1 Lead for Sta 28 & 29 Page 16 5 Tip on 43, Ring on 44 Tip on 45, Ring on 46 6 Tip on 37, Ring on 38 TERMINAL DESIGNATIONS ON THE JS8819M-L1 RESISTANCE UNIT Tip on Tip on Tip on Tip on Tip on 1, Ring on 2 3, Ring on 4 5, Ring on 6 7, Ring on 8 9; Ring on 10 7 6 8 ISS 4, SECTION 550-550-210 TABLE A - Continued CABLE PAIR NOS. TERMINATIONS AT CROSSCONNECTING TERMINAL 156 157 158 159 160 156 Trk 1 L1 Lead for Sta 30 & 31 157 Trk 1 L1 Lead for Sta 32 & 33 158 Trk 1 L1 Lead for Sta 34 & 35 159 Trk 1 L1 Lead for Sta 36 & 37 160 Trk 1 L1 Lead for Sta 38 & 39 Tip on 11, Ring on Tip on 13, Ring on Tip on 15, Ring on Tip on 17, Ring on Tip on 19, Ring on 12 14 16 18 20 161 162 163 164 165 161 Trk 2 L1 Lead for Sta 20 & 21 162 Trk 2 L1 Lead for Sta 22 & 23 163 Trk 2 L1 Lead for Sta 24 & 25 164 Trk 2 L1 Lead for Sta 26 & 27 165 Trk 2 L1 Lead for Sta 28 & 29 Tip on 21, Ring on Tip on 23, Ring on Tip on 25, Ring on Tip on 27, Ring on Tip on 29, Ring on 22 24 26 28 30 166 167 168 169 170 166 Trk 2 L1 Lead for Sta 30 & 31 167 Trk 2 L1 Lead for Sta 32 & 33 168 Trk 2 L1 Lead for Sta 34 & 35 169 Trk 2 L1 Lead for Sta 36 & 37 170 Trk 2 L1 Lead for Sta 38 & 39 Tip on 31, Ring on Tip on 33, Ring on Tip on 35, Ring on Tip on 37, Ring on Tip on 39, Ring on 32 34 36 38 40 171 172 173 174 175 171 Trk 3 L1 Lead for Sta 20 & 21 172 Trk 3 L1 Lead for Sta 22 & 23 173 Trk 3 L1 Lead for Sta 24 & 25 174 Trk 3 L1 Lead for Sta 26 & 27 175 Trk 3 L1 Lead for Sta 28 & 29 Tip on 41, Ring on Tip on 43, Ring on Tip on 45, Ring on Tip on 47, Ring on Tip on 49, Ring on 42 44 46 48 50 176 177 178 179 180 176 Trk 3 L1 Lead for Sta 30 & 31 177 Trk 3 L1 Lead for Sta 32 & 33 178 Trk 3 L1 Lead for Sta 34 & 35 179 Trk 3 L1 Lead for Sta 36 & 37 180 Trk 3 L1 Lead for Sta 38 & 39 Tip on 51, Ring on Tip on 53, Ring on Tip on 55, Ring on Tip on 57, Ring on Tip on 59, Ring on 52 54 56 58 60 181 182 183 184 185 181 Trk 4 L1 Lead for Sta 20 & 21 182 Trk 4 L1 Lead for Sta 22 & 23 183 Trk 4 L1 Lead for Sta 24 & 25 184 Trk 4 L1 Lead for Sta 26 & 27 185 Trk 4 L1 Lead for Sta 28 & 29 Tip on 61, Ring on Tip on 63, Ring on Tip on 65, Ring on Tip on 67, Ring on Tip on 69, Ring on 62 64 66 68 70 186 187 188 189 190 186 Trk 4 L1 Lead for Sta 30 & 31 187 Trk 4 L1 Lead for Sta 32 & 33 188 Trk 4 L1 Lead for Sta 34 & 35 189 Trk 4 L1 Lead for Sta 36 & 37 190 Trk 4 L1 Lead for Sta 38 & 39 Tip on 71, Ring on Tip on 73, Ring on Tip on 75, Ring on Tip on 77, Ring on Tip on 79, Ring on 72 191 191 L1 Leads for Stations provided with local line lamps Tip on 81, Ring on 82 TERMINAL DESIGNATIONS ON THE J58819M·L1 RESISTANCE UNIT 74 76 78 80 Page 17 SECTION 550-550-210 TABLE A - Continued CABLE PAIR NOS. 192 193 194 195 196 197 198 199 200 TERMINATIONS AT CROSS. CONNECTING TERMINAL TERMINAL DESIGNATIONS ON THE J58819M.L1 RESISTANCE UNIT 192 L1 Leads for Stations provided with local line lamps Tip on 83, Ring on 84 193 L1 Leads for Stations provided with local line lamps Tip on 85, Ring on 86 194 L1 Leads for Stations provided with local line lamps Tip on 87, Ring on 88 195 L1 Leads for Stations provided with local line lamps Tip on 89, Ring on 90 196 L1 Leads for Stations provided with local line lamps Tip on 91, Ring on 92 197 L1 Leads for Stations provided with local line lamps Tip on 93, Ring on 94 198 L1 Leads for Stations provided with local line lamps Tip on 95, Ring on 96 199 L1 Leads for Stations provided with local line lamps Tip on 97, Ring on 98 200 L1 Leads for Stations provided with local line lamps Tip on 99, Ring on 100 Notes: 1. L leads, for trunk lamp indicators. 2. L1 and L2 leads, for individual trunk ringers or buzzers. See SD-66503-01. 3. Battery and ground to PBX equipment. When used for central office battery charging feeders, connect rings to terminals 50 to 54. When used for building battery feeders, connect rings to terminals 52 to 56. 4. CB- leads and ground, for trunk ringers. Strap as required on T.S. A to group trunks on common ringers. See SD-66503-01. 5. LL leads, for station line lamps. See SD-66504-01. 6. Leads for control key. See SD-66504-01 and SD-66507-01. 7. Ground leads for trunk lamp indicators. 8. Ground for pick-up key. See SD-66504-01 and SD-66507-01. Page 18 ISS 4, SECTION 550-550-210 TABLE B TERMINATION OF CABLE PAIRS BETWEEN CONNECTING BLOCK AND KTU UNITS FOR AC LAMPS AND PRIMARY APPEARANCE OF DC LAMPS AC LAMP SUPPLY CROSS CONNECT BP CHAMBER PR NO. 63 Tip 52 Ring 64 Tip 55 Ring 65 Tip 58 Ring 66 Tip 61 Ring I STA Ll LEADS TRK1 20-39 TRK2 20-39 TRK3 20-39 TRK4 20-39 LG I CONN BLK PR NO. 1 1 2 2 15 15 3-7 8 8 9 9 16 16 10-14 26 26 27 27 17 17 28-32 33 33 34 34 18 18 35-39 19-25 ~CA'LE PR NO. I COLOR KTU LEAD DESIG TYPE 1 Tip 1 Ring 2 Tip 2 Ring 3 Tip 3 Ring White Blue White Orange White Green GRD L L1 L1 LG LG 17B 17B 17B 17B 17B 17B 4 Tip 4 Ring 5 Tip 5 Ring 6 Tip 6 Ring White Brown White Slate Red Blue GRD L L1 L1 LG LG 7 Tip 7 Ring 8 Tip 8 Ring 9 Tip 9 Ring Red Orange Red Green Red Brown 10 Tip 10 Ring 11 Tip 11 Ring 12 Tip 12 Ring Red Slate Black Blue Black Orange ~ TERM NO. 1 1 1 1 1 1 1 3 6 7 2 2 17B 17B 17B 17B 17B 17B 2 2 2 2 2 2 1 3 6 7 2 2 GRD L L1 L1 LG LG 17B 17B 17B 17B 17B 17B 3 3 3 3 3 3 1 3 6 7 2 2 GRD L L1 L1 LG LG 17B 17B 17B 17B 17B 17B 4 4 4 4 4 4 1 3 6 7 2 2 L L1 L L1 L L1 L L1 22H 22H 22H 22H 22H 22H 22H 22H 1 1 1 1 1 1 2 2 3 2 4 6 1 8 3 2 DC LAMP SUPPLY 52 Tip 55 Tip 58 Tip 61 Tip 95 Tip 95 Ring TRK1 L1 TRK2 L1 TRK3 L1 TRK4 L1 LG LG 46 46 47 47 48 48 49 99 50 50 13 Tip 13 Ring 14 Tip 14 Ring 15 Tip 15 Ring 16 Tip 16 Ring Black Green Black Brown Black Slate Yellow Blue Page 19 SECTION 550-550-210 Cabling Between Cross-Connecting Terminal and PBX (A) Cable Entrance At Top of PBX When the cable is brought in thru top entrance hole of the PBX, Fig. 10, remove cover plate and place it over cable hole in partition above battery compartment. 4.13 Remove fibre sheet replaced by cable hole cover in 4.13 and if cable does not fill hole, cut fibre to fit around cable. 4.14 4.15 Butt incoming lead covered cables just above entrance hole and tape. See Fig. 10. Enter cable into cross-connecting terminal, skin, and connect to terminals as shown in Fig. 4 or 5 and Table A. With binding post chambers shown in Fig. 3 or 7 this is not necessary as cable pairs are shop connected, if not, terminate as shown. 4.21 (B) Cable Entrance at Bottom of PBX When cable is brought in at bottom of the PBX, remove fibre piece covering hole and if cable does not fill hole cut fibre to fit around cable. 4.22 Cables may be brought into the PBX from below. It will be necessary to cut holes in wooden base to match slots in metal PBX framework. 4.23 Inside wiring cable used for incoming cables may be run to jumper rings before removing outer sheath. See Fig. 12. 4.16 4.17 Enter cable and sew to jumper rings. See Fig. 10 or 12. Conductor pairs in cable between crossconnecting terminal and PBX terminal strips A and B are shown in Figs. 3, 4, 5, or 7, and Table A. 4.18 Run groups of pairs thru proper fanning holes in terminal strips A and B. Skin and connect to terminals. See Figs. 13 and 14, and Table A. 4.19 When dc lamp power is to be provided, run groups of pairs to lamp resistance unit. Sew into form, skin, and connect. See Fig. 2. The "L" leads from trunk and station equipment, terminated on terminal strip A, may be sewn in the same form. The J58819M, Ll Resistance Unit (See 3.21) is made up of fifty 19-type resistors. Each 19-type resistor consists of two 290-ohm resistances. Each resistor has a terminal for each 290-ohm resistance and a center tap terminal. The odd numbered terminals are the top terminals and the even numbered terminals are the bottom terminals of the fifty 19-type resistors. Connect the tip wire of the first lamp lead pair to the top terminal (1) of the first resistor and the ring wire to the bottom terminal (2) of the first resistor, etc. See Table A. Straps between center terminals of resistors shall be arranged to group resistors per job requirements. Connect "L" leads to grouped resistors accordjngly. 4.20 Page 20 Butt incoming lead covered cable and tape. See Fig. 11. Where dirt and dampness are not a consideration the cable may be butted outside the PBX, taped, and brought in as shown. 4.24 Run cable along floor of battery compartment in bottom of PBX and upward through cable hole in top of battery compartment to jumper rings. See Fig. 11. 4.25 Inside wiring cable, used for incoming cables, may be run to the jumper rings shown in Fig. 11 before removing the outer sheath. 4.26 4.27 Sew cables to jumper rings and terminate as covered in 4.18 through 4.21. Connections at PBX Terminal Strips in Lieu of Cross-Connecting Terminal Generally this type installation would apply when power for trunk lamps is to be furnished from the PBX battery or local building battery. 4.28 Install two No. 100-type terminal strips in the location shown in Fig. 12 where it is desired to provide arrangements for crossconnecting station lines at PBX terminal strips. 4.29 ISS 4, SECTION 550-550-210 Cable or Cables to Cross connecting Terminal or ___ P. B. X. Stations ~~~~::=:;:=::::~~~fimB~u:'t;t ~Le:a~d~covered Cable or Cables on outside of P.B.X. and tape. No. 149-Type Term. Strip B. See Figs. 13 and 14 for incoming cable terminations. (Only part of terminals shown.) Apply 2 layers of friction tape over cable conductors from entrance of cable to jumper ring fastening. Tie cable to cable support on frame of P. B. X. Jumper Ring LJI . .u- Apply 2 layers of friction tape over cable conductors between jumper rings. , Jumper Ring No. 149-Type Term. Strip A. see Figs. 13 and 14 for incoming cabl,e_ _~~_-r-I terminations. (Only part of terminals shown.) Fig. 10 - Typical Cabling of PBX With Lead Covered Cable Where a Cross-Connecting Terminal is Provided - Cable Entrance at Top of PBX Page 21' SECTION 550-550-210 -= _ _ _I - \ '00 0 00 0 00 00 00 00 00 0 00 0 00 0 0 00