| Electrical Communication is a free textbook on the basics of communication technology. See the editorial for more information.... |
|
Home  Telephone Toll Service and Systems Type H Carrier Telephone System |
|
 Search the VIAS Library | Index
|
  |
Type H Carrier Telephone SystemThe type H39,40 is a single-channel system (Fig. 18) used on open-wire circuits about 100 to 200 miles long. Copper oxide modulators and demodulators are used, the carrier is suppressed, and one sideband is transmitted. This system is provided with a rectifier and can be operated from a 110-volt, 60-cycle source.
|
|
| Home Telephone Toll Service and Systems Type H Carrier Telephone System |
|
Last Update: 2011-05-30