Establishments primarily engaged in manufacturing wire telephone and telegraph equipment. Included are establishments manufacturing modems and other telephone and telegraph communications interface equipment. Establishments primarily engaged in manufacturing cellular radio telephones are classified in Industry 3663.
| Auto-transformers for telephone switchboards | Switching equipment, telephone |
| Carrier equipment, telephone and telegraph | Telegraph office switching equipment |
| Communications headgear, telephone | Telephone answering machines |
| Data sets, telephone and telegraph | Telephone central office equipment, dial and manual |
| Facsimile equipment | Telephone dialing devices, automatic |
| Headsets, telephone | Telephone sets, except cellular radio telephone |
| Message concentrators | Telephone station equipment and parts, wire |
| Modems | Telephones underwater |
| Multiplex equipment, telephone and telegraph | Telephones, sound powered (no battery) |
| Switchboards, telephone and telegraph | Toll switching equipment, telephone |
| Codes |
Titles | Total Marketable US Businesses |
| 36610000 | Telephone and telegraph apparatus | 334 |
| 36610100 | Telephones and telephone apparatus | 203 |
| 36610101 | Autotransformers for telephone switchboards | 3 |
| 36610102 | Communication headgear, telephone | 26 |
| 36610103 | Facsimile equipment | 8 |
| 36610104 | Headsets, telephone | 36 |
| 36610105 | Modems | 54 |
| 36610106 | Switching equipment, telephone | 18 |
| 36610107 | Telephone answering machines | 8 |
| 36610108 | Telephone central office equipment, dial or manual | 9 |
| 36610109 | Telephone dialing devices, automatic | 14 |
| 36610110 | Telephone sets, all types except cellular radio | 34 |
| 36610111 | Telephone station equipment and parts, wire | 19 |
| 36610112 | Telephones, sound powered (no battery) | 2 |
| 36610114 | Toll switching equipment, telephone | 1 |
| 36610200 | Telegraph and related apparatus | 4 |
| 36610201 | PBX equipment, manual or automatic | 6 |
| 36610202 | Telegraph office switching equipment | 0 |
| 36610203 | Telegraph or telephone carrier and repeater equipment | 6 |
| 36610204 | Telegraph station equipment and parts, wire | 0 |
| 36619901 | Carrier equipment, telephone or telegraph | 17 |
| 36619902 | Data sets, telephone or telegraph | 7 |
| 36619903 | Electronic secretary | 9 |
| 36619904 | Message concentrators | 15 |
| 36619905 | Multiplex equipment, telephone and telegraph | 3 |
| 36619906 | Switchboards, telephone or telegraph | 2 |
| 36619907 | Telephone cords, jacks, adapters, etc. | 22 |
| 36619908 | Fiber optics communications equipment | 257 |
