| 单词 | talk battery |
| 释义 | talk battery Referring to the 48V DC current that provides loop current, i.e., supports voice commu- nications over an electrified copper local loop. In a typical single-line residence or business application, the talk battery is provided from a common battery located in the central office exchange (CO or COE), across the local loop, to the telephone set. See also battery, CO, common battery, current, DC, local loop, and V. |
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