Telefonaktiebolaget Lm Ericsson (publ)

Johan Nordstr&ouml;m

Heino Jean Wendelrup

Lars Engelin

Johan Georg Michael Uggmark

Claes G&ouml;ran Pehrsson

Ola Martin Sallenhag

A microphone is provided in a mobile terminal and is connected to a current source when the flip portion of the mobile terminal is open and is disconnected from the current source when the flip portion of the phone is closed. The mobile terminal can then infer the position of the flip portion of the housing, e.g., opened or closed, based upon the state of the microphone's current supply circuit, for example by detecting the current flowing through the circuit or a voltage drop across a supply resistor. In addition, an on-hook/off-hook button can be provided to a hands-free accessory without increasing a number of signal lines/connections between the hands-free accessory and the mobile terminal. This can be accomplished, for example, by connecting the on-hook/off-hook button to a switch in the microphone signal line. The switch selectively creates an open in the microphone signal line, which can be detected by the mobile terminal, thereby resulting in an off-hook condition. In addition, an interface between a mobile terminal and other auxiliary or accessory devices can be generalized to accommodate either digital or analog signaling without an increase in the number of pins/signal lines associated with the interface.

Mobile terminal interface

A telephone has a loudspeaker mounted behind an earpiece portion of a housing, a center region of the earpiece portion having at least one central sound opening, through which sound generated by the loudspeaker is emitted. At least one bass sound opening is located in the housing remotely from the central sound opening, and devices are provided for generating sound with enhanced low-frequency characteristics through the bass sound opening.

Growing community of inventors

Lund, Sweden

Johan Nordström

Growing community of inventors

Lund, Sweden

Johan Nordstr&ouml;m

Johan Nordström