On This Page

• Bell System Practice (BSP) Documents
  • Telephone Collectors International (TCI) Library
  • 2500 Reference
  • 2500 Wiring
  • 35 Type Dial
  • 425 K Network
  • 505A Plugs
  • KS-19355 Adjuster Tool
  • Number Cards
• Resources
  • Paul F.'s Website: 2500-series Telephone Types
  • Porticus Website
  • Classic Rotary Phone Forum Topics
  • Other Resources
  • GLadstone's Classic Rotary Phone Forum Topic
• Repair Road Map

Telephone Collectors International (TCI) Library

http://www.telephonecollectors.info/

2500 Reference

502-510-121 I1

2500 Wiring

2500 Series Telephones, 2500d

502-510-450 I1

502-523-401 I8 May82 2500D DM DMG

35 Type Dial

501-164-115CA iC Jul70 - Station Dials, 35-type - 12-button Touch Tone

501-164-115 i10 May80 - Station Dials, 35-type - 12-button Touch Tone Tl

425 K Network

501-135-100 i4 Oct 80 - Networks

505A Plugs

461-630-105-i1-Plugs-for-Portable-Telephone-Sets Tl (Feb 1967)

461-630-105 I2-Plugs-for-Portable-Telephone-Sets Tl (Feb 1969)

KS-19355 Adjuster Tool

074-202-121 Tools - Adjusters IV - Description (July 1979)

074-202-121 I3 (January 1982)

Number Cards

Blank Number Cards

Paul F.'s Website: 2500-series Telephone Types

2500-series Telephone Types

Includes additional BSP document numbers to search for in the TCI Library.

Porticus Website

1500 and 2500 Phone Page:

https://beatriceco.com/bti/porticus/bell/telephones-2500.html

Western Electric Touch Tone Page:

https://beatriceco.com/bti/porticus/bell/telephones-technical_dials-touchtone.html

Classic Rotary Phone Forum Topics

WE 2500DM won't break dial tone

touchtone phone wont ring

My list of touch tone dials, and wiring

Touch-tone 35 type dial tuning/repair

OLD Wanted: KS-19355 Adjuster

Western Electric touch tone dial card font & font size

Other Resources

Blog Post:

• Fixing Western Electric phone with no tone

YouTube Video:

• 2015 Adjusting an old Touch Tone Dial
  • 5:55-- Homemade tool next to ruler
  • 7:26-- High frequency coil on Left, Low frequency coil on Right

GLadstone's Classic Rotary Phone Forum Topic

1971 2500 D Troubleshooting

The project / repair links on this website can be found here (in order of repair):

1. Wiring (Current) Adjusted wiring per BSP diagram
2. Line Cord Repair
3. 35Y3A Dial Troubleshooting
   1. DTMF Tone Baseline
   2. 35Y3A Dial Contacts
   3. 35Y3A Dial Contact Cleaning
   4. 35Y3A Dial Repair and Calibration