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(see the discussion of the CALL_AUTO_ANSWER parameter in section 6.3). When the
IP40 headset adapter is configured to automatically answer incoming calls and an
incoming call arrives, the adapter checks if a headset is attached to adapter. If so, the
call is immediately answered and the Answer/End button is green. If a headset is not
attached to the adapter, the adapter returns a SIP 180 Ringing response to the
incoming call and flashes the Answer/End button red. If the headset is reattached while
the adapter is ringing in auto answer mode, the adapter will answer the ringing call.
When the headset is not configured to answer incoming calls and an incoming call
arrives, the adapter returns a 180 Ringing response and flashes the Answer/End
button red. The adapter then checks if a headset is attached. If so, pressing the
Answer/End button briefly will answer the call, while disconnecting the headset will
refuse the call. If the headset was not attached when the incoming call arrives,
reattaching the headset will automatically answer the call.
Terminating Calls
If the IP40 headset adapter is configured so that the disconnect button is enabled (see
section 6.3 discussion of the DISCONNECT_BUTTON parameter), pressing the
Answer/End button for half a second and releasing the button during an active call will
disconnect the call. The short delay requires a deliberate press. This deliberate key
press prevents calls from accidentally dropped calls. If this feature is disabled, only the
far end or PC control software will be able to end a call.
Making an Outgoing Call
If so configured, the IP40 can make an outbound call to a single configured phone
number or SIP URI (a full SIP address such as "sip:2000@example.com"). The phone
number or URI to call is stored in the AUTO_DIAL_NUMBER parameter.
Canceling an outgoing call is accomplished by holding down the Answer/End button for
half a second.
Message Waiting Indication
The Answer/End button can be used to indicate if a message is waiting for configured
voicemail account. If a message is received the Answer/End button will blink RED on
half a second and off 2.5 seconds to indicate a Voice Mail is available for this voice
mailbox subscriber. See section 6.2.2 for details
2.2 Volume Control Button
When the IP40 headset adapter boots, its receive volume is set to the middle or
reference position. During a call, the receive volume can be adjusted by pressing the
Volume Up (+) or Volume Down (-) button. Each time the volume is adjusted, a tone
plays. At the maximum and minimum loudness a distinctive tone plays. At the middle
volume position, a triple beep is played.
5/29/2009
Plantronics IP40 Administration Guide
Page 8
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