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Page 156 of 504 M 3900 description
553-3001-367 Standard 3.00 August 2005
if the handset is properly cradled on the hookswitch, login cannot occur even
if a headset is not plugged in.
The handset can be used without the headset plugged in. However, some
functionality, including the ability to login to the ACD queue, can vary with
the version of firmware installed on the M3905 and the release of software
running on the system. Refer to “M3900 Flash Download” on page 227 for
details on how to determine the firmware version installed on an M3900
Series Digital Telephone.
Earlier software releases and previous versions of M3900 firmware deliver
different operations. Phase I and Phase II M3905 telephones report a headset
present even if one is not. This allows a handset to be used without a headset
plugged in. The handset can plug into the handset port and ACD queue login
proceeds normally. Login can occur even if neither a handset or headset is
present.
Phase III telephones correctly recognize the presence or absence of a headset.
If a headset is present on a Phase III M3905, then a handset can also be used.
If a headset is not present, a handset must to be plugged into the headset port
to allow normal ACD queue login. However, when the handset is in the
headset port, the system does not accept signals from the telephone's
hookswitch. Hanging up the handset (going ONHOOK) does not disconnect
calls. The Goodbye key must be used to release a call.
As of Succession 3.0 and later software, when the M3905 is in use, the system
software checks the headset port to verify that a headset, or some other
device, is plugged in. If no device is present and the HEADSET button is off,
the system assumes a handset is being used in the handset port of the set. The
system is then prepared to respond to signals from the M3905 telephone’s
hookswitch, even though a headset is not present. M3905 firmware version
8.9 or later is required to send these hookswitch signals to the system. This
allows the set to login to the ACD queue when the handset is taken
OFFHOOK, and calls to be disconnected when the handset is hung up (placed
ONHOOK).
Headset options
The M3901, M3902, and M3904 supports an amplified headset when the
headset connects to the handset jack.