Key Latch
ON
Head Set
ON
“3” Key
ON
Key Latch
ON
Head Set
ON
“3” Key
ON
Key Latch
ON
Head Set
ON
“3” Key
ON
Key Latch
ON
Head Set
OFF
“3” Key
ON
Key Latch
OFF
Head Set
OFF
“3” Key
ON
Phone
ON
Phone
ON
Phone
OFF
Phone
OFF
Phone Only
ON
Phone Only
OFF
Phone Only
OFF
Phone Only
OFF
Phone Only
OFF
NO USB
TRANSMIT
Talk on
phone only
from the
headset
USB TRANSMIT
from
PTT
FOOTPEDAL
HEADSET
Talk on phone and
USB together at
same time from
headset
USB TRANSMIT
from
PTT
FOOTPEDAL
HEADSET
Talk on USB
from headset
Talk on phone
from handset
USB TRANSMIT
from
PTT
FOOTPEDAL
Talk on USB
from VCC-28
microphone
Talk on phone
from handset
USB TRANSMIT
from
pushing “3” key
Talk on USB
from VCC-28
microphone
Talk on phone
from handset
Phone
OFF
