Introduction

The purpose of this page is to give an overview of this particular 1971 2500 D Desk Phone and related resources so that it can be used as a reference for the project / repair links for this phone.

On This Page

• Background Information
• Repair Road Map
• Current Status
• Next Step

Start with these pages:

• Documents & Resources

Bell System Practice (BSP) Documents & Classic Rotary Phone Forum Topic Links

• Dates

Overview of phone part dates

• Wiring

Overview in photos & charts

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

Working "daily driver."

For more information about the Troubleshooting-- see this topic on the Classic Rotary Phones Forum (CRPF):

• 1971 2500 D Troubleshooting

Enjoy using the phone!