Avaya H.323 9608 Installing And Maintaining page 17

Table 1: The impact of additional devices on power requirements over Ethernet Power
Class
Phone Default
Model
(Class
"L" on
switch)
9608 Class 1
9611G Class 1
Class 2
9621G
9641G Class 2
Note:
The deskphone monitors power consumption to conform to the IEEE 802.3af specifications. If
you connect a Dual Headset Adapter (DHA), the power classification might change and you
must then change the switch setting as well.
Note:
In 9611G and 9641G, the USB interface supports USB login, use of digital pictures from a
USB device as a screensaver, and import or export of contact lists by a Flash drive. The
9608 does not support USB devices, and the 9621G model does not have a USB jack. Since
the power consumption of the drive varies from product to product, you cannot state how a
USB will impact PoE power class. When the drive attempts to register with the deskphone,
the deskphone determines if its current power class setting is adequate to support the drive.
If power is adequate, the deskphone lets the drive register. If the power is not adequate, the
deskphone will alert the user to change the power class by changing the IEEE power switch
setting from L to H. In extreme situations, the total power consumption with the addition of
a USB device may be greater than what the Class 3 power source can provide. In that case,
the deskphone detects this and instructs the user to use an auxiliary power supply or to
temporarily disconnect one or more of the modules while the USB device is in use. The
system parameter USBPOWER determines for which power class or classes to enable
power to the USB interface. For more information, see Chapter 7 in the Administering Avaya
IP Deskphone H.323 9608, 9611G, 9621G, and 9641G.
Important:
The last step in assembling the 9600 Series IP Deskphone is to plug in the deskphone with
any modules or adapters or both but without attachments such as USB devices and
headsets. Plug in the deskphone to a power source either by plugging the power cord into
the power source (local power) or plug the modular line cord into the Ethernet wall jack (IEEE
power). For more information, see
Installing and Maintaining Avaya IP Deskphone H.323 9608, 9611G, 9621G, and 9641G
One
PoE BM12 BM12s
(IEEE (IEEE
switch switch
IEEE setting) setting)
L L
H H
Not applicable; the 9621G does not support button modules or USB
devices.
L L
Two Three One
BM12s SBM24
(IEEE (IEEE
switch switch
setting) setting)
H L
H H
L L
Completing the power connection
Plugging in the deskphone
Two Three
SBM24s SBM24s
(IEEE (IEEE
switch switch
setting) setting)
H H
H H
L H
on page 20 .
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