Motorola i580 User Manual page 194

Using a Headset
For phone calls, use the remote PTT button to
answer calls, switch between calls, and end calls.
Hold the remote PTT button for less than 2
seconds to answer calls and switch between calls.
Hold the remote PTT button for more than 2
seconds to end calls.
For InstantLINC Mobile to Mobile calls and group
calls, use the remote PTT button as you would the
PTT button on your phone.
Note: When using a headset, the PTT button on
your phone works the same way as when
you are not using a headset. Sounds
associated with InstantLINC Mobile to
Mobile calls and group calls are heard
through the headset.
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