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Bell System Practices 220 Identification, Installation, Connections, And Maintenance

Hand telephone sets
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Summary of Contents for Bell System Practices 220

  • Page 2 SECTION 502-303-1 02 315-TYPE AMPLIFIER VOLUME CONTROL RECALL SWITCH NOTE· NOTE 22208 AND 2220BM 226A HAND SET HANDSETS HAVE SAME, EXCEPT ROUND DIAL HAS ROTARY DIAL. BUTTONS Fig. 2-2220C Hand Telephone Set Fig. 3-2226A Hand Telephone Set and 2226A handsets are equipped with jacks and/or transformer) or equivalent 6-volt supply.
  • Page 3 SECTION 502-303-102 Fig. 4-H4DU Handset Cord Installed in Hand Telephone Set shown in Fig. 5. The LED equipped TOUCH-TONE dial handsets can be identified by the square dial buttons. The 226A and 2226A handsets contain an 2.06 amplifier which provides up to 20dB of receiver gain for customer's with impaired hearing Fig.
  • Page 4 AD2, AD3 D4BU AC1, AC1P 630A (AClP) Parts Note 2 LED Printed D5AL under Fin � 220C, 226A, H4DU 231B (220 2220C(Late ACl, AClP 630A (AClP) 22 A) Square Version) Buttons on D4BU Dial (2220C 2226A None and 2226A) AC2, AC2P...
  • Page 5 HABLE Bf COLOR SELECTION COVER 220A, 220C, DIAL COVER 220AL, 220AM, 220A, 220C, OECK SHELL DECK SHELL COVER 22208, 2220C, 220AL, 220AM, 220C,226A 220C, 226A 2220C,2226A 2220C,2226A COLOR SUFFIX 226A, 2226A 2220BM 226A (SEE NOTE) (SEE NOTE) (SEE NOTE) (SEE NOTE) 818850034 Black 841376759...

  • Page 6: Installation

    SECTION 502-303-1 02 • Cover (Fig. 1, 3 and Table B) • Equipped with a recall switch to make repeated calls without hanging up handset • 812362382 (P-23F238) Light Seal Plate (220A, 220AM, 2220B, and 2220BM only) • Polarity Guard (factory provided, 2220C and 2226A only).
  • Page 7 ISS 2, SECTION 502-303-102 MOUNTING SCREW HOLES HOUSING SCREWS MOUNTING SCREWS (4) Fig. 7-2220C Hand Telephone Set With Chassis Assembly Removed from Deck Tip Party Identification (0-Kits of Parts) D-180824 (220AL) If tip party identification is required, install 3.04 a D-180824 Kit of Parts in the 220AL hand telephone set as follows.
  • Page 8 SECTION 502-303-1 02 base, refer to Section 502-303-101 or 502-322-400 for installation and connection information. (5) Replace the handset shell, paragraph 3.03. (8�)LEAO TERMINAL 4 IY1 LEAD TERM 1NAL A Fig. 8-D-180824 Kit of Parts Installed in 220AL Hand Telephone Set D-1 80825 (220C, 226A, 2220C, and 2226A) Install D-180825 Kit of Parts in 220C, 226A, 3.05...
  • Page 9 SECTION 502-303- (2) Connect the insulated and stored handset of the jack paralleling the existing gold contact cord jack lead and one end of the spring (Fig. 9). 824612527 (P-46J252) lead assembly furnished in the kit together using a D-161488 connector (4) Remove the screw from the flexible circuit (ordered separately).

  • Page 10: Maintenance

    SECTION 502-303-1 02 To replace the 315-type amplifier in 226A with the lip of the grommet protruding outside 4.03 the assembly. or 2226A handsets, proceed as follows. (5) Place the receiver unit in the coil assembly (1) Remove shell from handset, paragraphs 3.01 (Fig.
  • Page 11 For dial restriction of a TOUCH-TONE dial Internal connections for the 220-, 226-, and 5.02 5.03 equipped hand telephone set without a 2220-, and 2226-type hand telephone sets are polarity guard, reverse tip and ring in telephone shown in Fig.
  • Page 12 SECTION 502-303-102 812558039 (P-25E803) 840363980 CARD CARD RETAINER 840362982 RECEIVER RECEIVER Fig. 11-D-180719 Kit of Parts and Receiver Unit Fig. 13-Receiver Unit and Gasket Installed in Coil Assembly Fig. 12-Receiver Unit Installed in Coil Assembly Fig. 14-Field Coil Installed in Receiver Cup of Chassis Assembly Page 12 SSP S02-303-102·i02_1979-12-12.jpg...
  • Page 13 ISS 2, SECTION 502-303-102 Fig. 16-Terminating Field Coil Leads to Receiver Cup Mounting Screws NETWORK RECEIVER CUP MOUNTING SCREWS Fig. 1 S-2220C Hand Telephone Set Showing Location of Network Mounting Screws Fig. 1 7-Removing Dial Lamp from 22208M Hand Telephone Set Page 1 3 SSP S02-303·102-i02_1979·12·13.jpg Scanned b y Frank Harrell, (Cowboy Frank) Castle Rock, Colorado...
  • Page 14 SECTION 502-303- 1 02 • • • • • • Fig. 20-Fastening Amplifier t o Receiver Unit Cup of Hand Telephone Set Fig. 18-Removing Dial Lamp Using SS3A Tool 315- TYPE AMPLIFIER NETWORK CONNECTING SCREWS NETWORK RECEIVER CUP MOUNTING SCREW Fig.
  • Page 15 ISS 2. SECTION 502-303-1 02 Fig. 2 1-Releasing Spring Catch on 3 15-Type Amplifier Page 1S SSP S02-303-102·i02_1979-12·15.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Feb 07,2012 13:32:25...
  • Page 17 ISS 2, SECTION 502-303- 1 02 2270 JACK RECALL DIAL NETWORK RECEIVER TRANSMITTER DIAL ADAPTER SWITCH LIGHT UNIT UNIT (SEE NOTE) >--- --7 >--- --7 TIP)--- -- -7 RING)---? PART IDEN NOTE: PROVIDED WITH 220AM HANDSET ONL Y . OP - DIAL PULSE CONTACTS Fig.
  • Page 18 SECTION 502-303- 1 02 RECALL NETWORK RECEIVER RANSMITTER OIAL SWITCH UNIT UNIT RING OIAL PULSE CONTACTS Fig. 24-Schematic of 220C Hand Telephone Set Page 1 8...
  • Page 19 ISS 2, SECTION 502-303- 1 02 2270 RECALL RECEIVER TRANSMITTER JACK NETWORK DIAL ADAPTER SWITCH UNIT UNIT >--- -- --7 >--- -- --7 1 )--- -- --7 RING DP - DIAL PULSE CONTACTS Fig. 25-Schematic of 220AL Hand Telephone Set Page 19 BSP 502-303-102-i02_1979-12-19.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado...
  • Page 20 S1S- RECALL NETWORK RCVR TRMTR 315A AMPLIFIER DIAL � TYPE SWITCH UNIT UNIT ..JACK "' RING OP-DIAL PULSE CONTACT Fig. 26-Schematic of 226A Hand Telephone Set BSP 502-303-10 2-i02_1979 -12-20.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Feb 07,2012 13:34:03...
  • Page 21 ISS 2, SECTION S02-303-1 02 227D JACK RECALL DIAL NETWORK RECEIVER RANSMITTER DIAL ADAPTER SWITCH LIGHT UNIT UNIT (SEE NOTE) (+ ) RING PARTY IDE NT NOTE: PROVIDED WITH 2220BM HANDSET ONLY. Fig. 27-Schematic of 22208 (MD) and 2220BM Hand Telephone Set Page 2 1 BSP 502-303-102-i02_1979-12-21.jpg Scanned b y Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Feb 07, 2012 13:34:23...
  • Page 23 ISS 2, SECTION S02-303-1 02 RECALL 616- NETWORK RECEIVER AMPLIFIER 31 5 8 TYPE SWITCH UNIT JACK TRANSMITTER UNIT Fig. 29-Schematic of 2226A Hand Telephone Set Page 23 23 Pages BSP S02-303-102-i02_1979-12-23.jpg Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Feb 07, 2012 13:34:59...

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