| 摘要 |
A telephone apparatus includes a phone jack arrangement (299) providing an interface to land lines from the central office and other telephone apparatuses. Phone jack arrangement (299) comprises a phone jack (306) having inner conductors (420, 422) coupled to outer conductors (406, 408) of a phone jack (304), and outer conductors (424, 426) coupled to inner conductors (402, 404) of phone jack (304). Condition detectors (232, 234) detect whether phone lines of phone line circuitry (270) are connected to land lines, and microprocessor (212) may operate the telephone apparatus or configure base station user interface (126) accordingly. A two-line operating mode may select one of the phone lines for operating use upon detection of a predetermined condition from condition detectors (232, 234) or ring detectors (246, 248). Thus, a multi-line telephone apparatus operates flexibly according to different phone line connections.
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