| 摘要 |
A mobile terminal has means for providing push-to-talk functionality, a volume control member, and a controller associated with the volume control member. The controller is adapted to cause a change in an acoustic output level of the mobile terminal in response to a user actuation of said volume control member. The controller is further adapted to determine whether a duration of said user actuation exceeds a predetermined time period and, in response to said duration exceeding said predetermined time period, to generate a control signal to said means for providing push-to-talk functionality.
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