This object controls the behavior of the remote configuration
of Cisco VOIP phones via Cisco CDP. Setting this object to
a value of -1 will cause the device to not attempt to
remotely configure a Cisco phone using CDP. Setting this
object to a value of 0 will cause the device to configure
the phone to send 802.1p priority tagged frames. A value of
4095 will cause the device to configure the phone to send
untagged frames. A value in the range 1..4094 will cause
the device to configure the phone to send 802.1Q tagged frames
using that value as the VLAN ID encoded in the tag. This object
SHOULD be maintained across device reboots.