| 单词 | dial-up circuit |
| 释义 | dial-up circuit Referring to a circuit established by dialing the number of the remote telephone or other device over a public switched telephone network (PSTN), rather than over a dedicated circuit.There also are switched data services (e.g., Switched 56), many of which operate over the PSTN, as well. See also circuit, dedicated circuit, dial, PSTN, and Switched 56. |
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