the Power Negotiation feature is disabled, the phone can power the accessories up to the maximum that the
IEEE 802.3af-2003 standard allows.
• When CDP and Power Negotiation are disabled, the phone can power the accessories up to 15.4W.
Note
Network Protocols
Cisco IP Phone 8800 Series support several industry-standard and Cisco network protocols required for voice
communication. The following table provides an overview of the network protocols that the phones support.
Table 92: Supported Network Protocols on the Cisco IP Phone 8800 Series
Usage notesPurposeNetwork protocol
Cisco IP Phones 8845, 8865, and 8851
support Bluetooth 4.1.
Cisco IP Phone 8861 support Bluetooth 4.0.
Cisco IP Phone 8811 and 8841 do not
support Bluetooth.
Bluetooth is a wireless personal area
network (WPAN) protocol that specifies
how devices communicate over short
distances.
Bluetooth
—BootP enables a network device, such as
the Cisco IP Phone, to discover certain
startup information, such as the IP address.
Bootstrap Protocol (BootP)
The Cisco IP Phones use CDP to
communicate information such as auxiliary
VLAN ID, per port power management
details, and Quality of Service (QoS)
configuration information with the Cisco
Catalyst switch.
CDP is a device-discovery protocol that
runs on all Cisco-manufactured equipment.
Using CDP, a device can advertise its
existence to other devices and receive
information about other devices in the
network.
Cisco Discovery Protocol (CDP)
DHCP is enabled by default. If disabled,
you must manually configure the IP
address, subnet mask, and gateway on each
phone locally.
The DHCP Option To Use
parameter has
66,160,159,150,60,43,125 as its
default value. This value
indicates the order in which the
phone uses the IP address
provided by the DHCP server.
Note
DHCP dynamically allocates and assigns
an IP address to network devices.
DHCP enables you to connect an IP phone
into the network and the phone to become
operational without the need to manually
assign an IP address or to configure
additional network parameters.
Dynamic Host Configuration Protocol
(DHCP)
Cisco IP Phone 8800 Series Multiplatform Phone Administration Guide for Release 11.3(1) and Later
448
Technical Details
Network Protocols
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