Bluetooth
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Bluetooth
is a wireless personal area network (WPAN) protocol that specifies how devices
communicate over short distances.
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Cisco IP Phones 8845, 8865, and 8851 support Bluetooth 4.1.
Cisco IP Phone 8861 support Bluetooth 4.0.
Cisco IP Phone 8811, 8841, 8851NR, and 8865NR do not support Bluetooth.
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Bootstrap
Protocol (BootP)
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BootP
enables a network device, such as the Cisco IP Phone, to discover certain
startup information, such as the IP address.
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—
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Cisco Audio Session Tunnel (CAST)
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The CAST protocol allows your phones and associated applications to communicate with the remote IP Phones without requiring
changes to the signaling components.
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The Cisco IP Phone uses CAST as an interface between CUVA and Cisco Unified Communications Manager using the Cisco IP Phone
as a SIP proxy.
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Cisco
Discovery Protocol (CDP)
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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.
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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.
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Cisco Peer-to-Peer Distribution Protocol (CPPDP)
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CPPDP is a Cisco proprietary protocol used to form a peer-to-peer hierarchy of devices. This hierarchy is used to distribute
firmware files from peer devices to their neighboring devices.
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CPPDP is used by the Peer Firmware Sharing feature.
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Dynamic
Host Configuration Protocol (DHCP)
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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.
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DHCP is enabled by default. If disabled, you must manually configure the IP address, subnet mask, gateway, and a TFTP server
on each phone locally.
We recommend that you use DHCP custom option 150. With this method, you configure the TFTP server IP address as the option
value. For more information, see the documentation for your particular Cisco Unified Communications Manager release.
Note
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If you cannot use option 150, you may try using DHCP option 66.
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Hypertext
Transfer Protocol (HTTP)
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HTTP is
the standard way of transferring information and moving documents across the
Internet and the web.
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Cisco IP Phones use HTTP for XML services and for troubleshooting purposes.
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Hypertext
Transfer Protocol Secure (HTTPS)
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Hypertext
Transfer Protocol Secure (HTTPS) is a combination of the Hypertext Transfer
Protocol with the SSL/TLS protocol to provide encryption and secure
identification of servers.
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Web
applications with both HTTP and HTTPS support have two URLs configured. Cisco
IP Phones that support HTTPS choose the HTTPS URL.
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IEEE 802.1X
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The IEEE 802.1X standard defines a client-server-based access control and authentication protocol that restricts unauthorized
clients from connecting to a LAN through publicly accessible ports.
Until the client is authenticated, 802.1X access control allows only Extensible Authentication Protocol over LAN (EAPOL) traffic
through the port to which the client is connected. After authentication is successful, normal traffic can pass through the
port.
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The Cisco IP Phone implements the IEEE 802.1X standard by providing support for the following authentication methods: EAP-FAST,
and EAP-TLS.
When 802.1X authentication is enabled on the phone, you should disable the PC port and voice VLAN.
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IEEE
802.11n/802.11ac
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The IEEE
802.11 standard specifies how devices communication over a wireless local area
network (WLAN).
802.11n
operates at the 2.4 GHz and 5 GHz band and 802.11ac operates at the 5 GHz band.
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The
802.11 interface is a deployment option for cases when Ethernet cabling is
unavailable or undesirable.
Only Cisco IP Phone 8861 and 8865 support WLAN.
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Internet
Protocol (IP)
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IP is a
messaging protocol that addresses and sends packets across the network.
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To
communicate using IP, network devices must have an assigned IP address, subnet,
and gateway.
IP
addresses, subnets, and gateway identifications are automatically assigned if
you are using the Cisco IPPhone with Dynamic Host Configuration Protocol
(DHCP). If you are not using DHCP, you must manually assign these properties to
each phone locally.
The Cisco IP Phones support IPv6 addresses. For more information, see the documentation for your particular Cisco Unified
Communications Manager release.
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Link
Layer Discovery Protocol (LLDP)
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LLDP is
a standardized network discovery protocol (similar to CDP) that is supported on
some Cisco and third-party devices.
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The
Cisco IPPhone supports LLDP on the PC port.
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Link
Layer Discovery Protocol-Media Endpoint Devices (LLDP-MED)
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LLDP-MED
is an extension of the LLDP standard for voice products.
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The
Cisco IPPhone supports LLDP-MED on the SW port to communicate information such
as:
- Voice VLAN configuration
- Device discovery
- Power management
- Inventory management
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Real-Time Transport Protocol (RTP)
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RTP is a
standard protocol for transporting real-time data, such as interactive voice,
over data networks.
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Cisco IP
Phones use the RTP protocol to send and receive real-time voice traffic from
other phones and gateways.
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Real-Time Control Protocol (RTCP)
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RTCP
works in conjunction with RTP to provide QoS data (such as jitter, latency, and
round-trip delay) on RTP streams.
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RTCP is enabled by default.
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Session Description Protocol (SDP)
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SDP is the portion of the SIP protocol that determines which parameters are available during a connection between two endpoints.
Conferences are established by using only the SDP capabilities that all endpoints in the conference support.
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SDP capabilities, such as codec types, DTMF detection, and comfort noise, are normally configured on a global basis by Cisco
Unified Communications Manager or Media Gateway in operation. Some SIP endpoints may allow configuration of these parameters
on the endpoint itself.
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Session
Initiation Protocol (SIP)
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SIP is
the Internet Engineering Task Force (IETF) standard for multimedia conferencing
over IP. SIP is an ASCII-based application-layer control protocol (defined in
RFC 3261) that can be used to establish, maintain, and terminate calls between
two or more endpoints.
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Like other VoIP protocols, SIP addresses the functions of signaling and session management within a packet telephony network.
Signaling allows transportation of call information across network boundaries. Session management provides the ability to
control the attributes of an end-to-end call.
Cisco IP Phones support the SIP protocol when the phones are operating in IPv6-only, IPv4-only, or in both IPv4 and IPv6.
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Transmission Control Protocol (TCP)
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TCP is a
connection-oriented transport protocol.
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Cisco IP Phones use TCP to connect to Cisco Unified Communications Manager and to access XML services.
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Transport Layer Security (TLS)
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TLS is a
standard protocol for securing and authenticating communications.
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Upon security implementation, Cisco IP Phones use the TLS protocol when securely registering with Cisco Unified Communications
Manager.
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Trivial
File Transfer Protocol (TFTP)
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TFTP
allows you to transfer files over the network.
On the
Cisco IPPhone, TFTP enables you to obtain a configuration file specific to the
phone type.
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TFTP requires a TFTP server in your network that the DHCP server can automatically identify. If you want a phone to use a
TFTP server other than the one that the DHCP server specifies, you must manually assign the IP address of the TFTP server
by using the Network Configuration menu on the phone.
For more information, see the documentation for your particular Cisco Unified Communications Manager release.
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User
Datagram Protocol (UDP)
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UDP is a
connectionless messaging protocol for delivery of data packets.
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UDP is
used only for RTP streams. SIP signaling on the phones do not support UDP.
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