Cisco 6901 Standard User manual

Cisco Unified IP Phone
•Phone Overview, on page 1
•Cisco Unified IP Phone 6901, on page 2
•Cisco Unified IP Phone 6911, on page 4
•General Phone Information, on page 8
•Network Protocols, on page 10
•Cisco Unified IP Phone 6901 and 6911 Supported Features, on page 14
•Cisco Unified IP Phones Security Features, on page 16
•Cisco Unified IP Phone Deployment, on page 24
•Phone Power Reduction, on page 28
•Terminology Differences, on page 28
Phone Overview
The Cisco Unified IP Phone 6901 and 6911 provides voice communication over an Internet Protocol (IP)
network. The Cisco Unified IP Phone functions much like a digital business phone, allowing you to place and
receive phone calls. The Cisco Unified IP Phones in this guide have the following attributes:
• Cisco Unified IP Phone 6901 supports basic features such as hold, redial, transfer, and conference.
• Cisco Unified IP Phone 6911 supports advanced features such as mute, hold, transfer, conference, speed
dial, call forward, and more.
A Cisco Unified IP Phone, like other network devices, must be configured and managed. These phones encode
G.711a, G.711mu, G.729a, G.729ab, and iLBC codecs, and decode G.711a, G.711mu, G.729, G.729ab, and
iLBC codecs. These phones encode and decode the codecs in similar manner.
Using a cell, mobile, or GSM phone, or two-way radio in close proximity to a Cisco Unified IP Phone might
cause interference. For more information, refer to the manufacturer’s documentation of the interfering device.
Caution
For more information, see the Cisco Unified IP Phone 6901 and 6911 User Guide for Cisco Unified
Communications Manager (SCCP and SIP).
Cisco Unified IP Phone
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Cisco Unified IP Phone 6901
The following sections describe the Cisco Unified IP Phone 6901 hardware.
Phone Connections
For your phone to work, it must be connected to the corporate IP telephony network.
Network port (10/100 SW) connection.
IEEE 802.3af power enabled.
4Slot for Ethernet cable.1
DC adaptor port (DC48V).5Handset connection.2
Slot for DC adaptor cable.6Slot for handset cable.3
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Cisco Unified IP Phone
Cisco Unified IP Phone 6901

Buttons and Hardware
Activates the features (hookflash)
on your phone.
Hookswitch1
Places a connected call on hold.Hold button2
Dials the last dialed number.Redial button3
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Cisco Unified IP Phone
Buttons and Hardware

Allows you to pick up a second
incoming call. The Line button
LED indicates the call status.
Allows you to answer a ringing call
and swap between two calls on the
same line. Also, you can use the
line button to create a new call
when the phone is idle. The LED
associated with the line button
lights up to reflect the line status.
Color LEDs indicate the line state:
• Green, steady—Active call
• Green, flashing—Held call
• Amber, Flashing—Incoming
call
•Amber, steady—Call Forward
All activated
• Red, steady—Remote line in
use (shared line)
• Red, flashing—Remote line
on hold
Line button4
Controls the handset (off hook) and
the ringer volume (on hook).
Volume button5
Allows you to dial phone numbers.Keypad6
Lights up to indicate a ringing call
(flashing red) or a new voice
message (steady red).
Handset with light strip7
Hookswitch Button
The cradle rest of your phone contains the hookswitch button. You can press and quickly release the hookswitch
button to activate features (hookflash) on your phone.
Cisco Unified IP Phone 6911
The following sections describe the Cisco Unified IP Phone 6901 hardware.
Phone Connections
For your phone to work, it must be connected to the corporate IP telephony network.
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Cisco Unified IP Phone
Hookswitch Button

Network port (10/100 SW) connection.
IEEE 802.3af power enabled.
41
52
Handset connection.6AC power wall plug (optional).3
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Cisco Unified IP Phone
Phone Connections

Buttons and Hardware
Lights up to indicate a ringing call
(flashing red) or a new voice
message (steady red).
Handset with light strip1
A paper strip used to enter name
and contact numbers.
Paper label2
Transfers a call.Transfer button3
Creates a conference call.Conference button4
Places an active call on hold.Hold button5
Allows you to pick up a second
incoming call and to resume a held
call. The LED shows call status.
Line button6
Selects the speakerphone as the
default audio path and initiates a
new call, picks up an incoming call,
or ends a call. During a call, the
button lights green. The
speakerphone audio path does not
change until you select a new audio
path (for example, by picking up
the handset).
Speakerphone button7
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Cisco Unified IP Phone
Buttons and Hardware

Allows you to dial phone numbers.Keypad8
Toggles the microphone on or off.
When the microphone is muted, the
button lights red.
Mute button9
Controls the handset and
speakerphone volume (off hook)
and the ringer volume (on hook).
Volume button10
Auto dials your voice messaging
system.
Messages button11
Dials the last dialed number.Redial button12
Depending on the phone setup, the
feature button provides you with
access to Speed Dial, Call Forward
All, Pickup, Group Pickup and
Meet Me features. You can
configure up to nine items on the
feature button. To access these
features, press the feature button
followed by the number associated
with the feature. You must press
the feature button and the number
within five seconds of each other.
The number can only be a single
digit number from 1–9.
You can access the following
features either off hook or on hook:
• Call Forward All—Allows
you to forward a call.
• Pickup—Allows you to
pickup a call on the third party
phone.
• Group Pickup—Allows you
pick up a call within a group.
• Meet Me—Allows you setup
a conference.
Feature button13
Phone handset.Handset14
Paper Label
Cisco Unified IP Phone 6911 does not include an LCD display. Cisco provides a paper strip, which can be
used to enter name and contact numbers.
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Cisco Unified IP Phone
Paper Label

Clean the Phone Screen
Procedure
If your phone screen gets dirty, wipe it with a soft, dry cloth.
Do not use any liquids or powders on the phone because they can contaminate the phone components
and cause failures.
Caution
General Phone Information
This section contains information that is common to all the IP Phone models in this guide.
Footstand
If the phone is placed on a table or desk, the footstand can be connected to the back of your phone for a higher
or lower viewing angle, depending on your preference.
Lift the footstand until the connectors
snap into the upper slots.
2Insert the connectors into the lower
slots.
1
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Cisco Unified IP Phone
Clean the Phone Screen

Phone Display Angle
Raise Phone Angle
Procedure
Connect the footstand to the lower slots for a higher viewing angle, as shown in the following figure.
Lower Phone Angle
Procedure
Connect the footstand to the upper slots for a lower viewing angle, as shown in the following figure.
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Cisco Unified IP Phone
Phone Display Angle

Important Headset Safety Information
High Sound Pressure—Avoid listening to high volume levels for long periods to prevent
possible hearing damage.
When you plug in your headset, lower the volume of the headset speaker before you put the headset on. If
you remember to lower the volume before you take the headset off, the volume will start lower when you
plug in your headset again.
Be aware of your surroundings. When you use your headset, it may block out important external sounds,
particularly in emergencies or in noisy environments. Don’t use the headset while driving. Don’t leave your
headset or headset cables in an area where people or pets can trip over them. Always supervise children who
are near your headset or headset cables.
Network Protocols
Cisco Unified IP Phones support several industry-standard and Cisco network protocols required for voice
communication. The following table provides an overview of the network protocols that the Cisco Unified
IP Phone 6901 and 6911 support.
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Cisco Unified IP Phone
Important Headset Safety Information

Table 1: Supported Network Protocols on the Cisco Unified IP Phone
Usage notesPurposeNetwork Protocol
-The CAST protocol allows IP
Phones and associated applications
behind the phone to discover and
communicate with the remote
endpoints without requiring
changes to the traditional signaling
components like Cisco Unified
Communications Manager and
gateways. The CAST protocol
allows separate hardware devices
to synchronize related media and it
allows PC applications to augment
nonvideo-capable phones to
become video enabled by using the
PC as the video resource.
Cisco Audio Session Tunneling
(CAST)
(Cisco Unified IP Phone 6911 only)
The Cisco Unified IP Phone uses
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 advertises its
existence to other devices and
receives information about other
devices in the network.
Cisco Discovery Protocol (CDP)
By default, the phone has DHCP
enabled. If disabled, you must
manually configure the IP address,
subnet mask, gateway, and a TFTP
server on each phone locally.
Cisco recommends that you use
DHCP custom option 150. With
this method, you configure the
TFTP server IP address as the
option value. For additional
supported DHCP configurations,
go to the “Dynamic Host
Configuration Protocol” chapter
and the “Cisco TFTP” chapter in
the CiscoUnifiedCommunications
Manager System Guide.
If you cannot use option
150, you may try using
DHCP option 66.
Note
DHCP dynamically allocates and
assigns an IP address to network
devices.
DHCP enables you to connect an
IP Phone into the network and have
the phone become operational
without needing to manually assign
an IP address or to configure
additional network parameters.
Dynamic Host Configuration
Protocol (DHCP)
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Cisco Unified IP Phone
Network Protocols

Usage notesPurposeNetwork Protocol
Cisco Unified IP Phones use HTTP
for troubleshooting purposes.
HTTP is the standard way of
transferring information and
moving documents across the
Internet and the web.
Hypertext Transfer Protocol
(HTTP)
The Cisco Unified 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 voice VLAN. Refer to
the 802.1X Authentication, on page
22 for additional information.
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
connects. After successful
authentication, normal traffic
passes through the port.
IEEE 802.1X
To communicate using IP, network
devices must have an assigned IP
address, subnet, and gateway.
IP addresses, subnets, and gateways
are automatically assigned if you
are using the Cisco
Unified IP Phone with Dynamic
Host Configuration Protocol
(DHCP). If you are not using
DHCP, you must manually assign
these properties to each phone
locally.
The Cisco Unified IP Phones
support IPv6 address. For more
information, see “Internet Protocol
Version 6 (IPv6)” in the Cisco
Unified Communications Manager
Features and Services Guide.
IP is a messaging protocol that
addresses and sends packets across
the network.
Internet Protocol (IP)
The Cisco Unified IP Phone 6911
supports LLDP on the switch and
PC port.
LLDP is a standardized network
discovery protocol (similar to CDP)
that is supported on some Cisco and
third-party devices.
Link Layer Discovery Protocol
(LLDP)
(Cisco Unified IP Phone 6911 only)
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Cisco Unified IP Phone
Network Protocols

Usage notesPurposeNetwork Protocol
The Cisco Unified IP Phone
supports LLDP-MED on the SW
port to communicate information
such as:
• Voice VLAN configuration
• Device discovery
• Power management
• Inventory management
For more information about
LLDP-MED support, see the
LLDP-MED and Cisco Discovery
Protocol white paper:
http://www.cisco.com/en/US/technologies/tk652/tk701/technologies_white_paper0900aecd804cd46d.html
LLDP-MED is an extension of the
LLDP standard developed for voice
products.
Link Layer Discovery
Protocol-Media Endpoint Devices
(LLDP-MED)
Cisco Unified IP Phones use the
RTP protocol to send and receive
real-time voice traffic from other
phones and gateways.
RTP is a standard protocol for
transporting real-time data, such as
interactive voice and video, over
data networks.
Real-Time Transport Protocol
(RTP)
By default, the phones have RTCP
disabled, but you can enable it on
each individual phone using
Cisco Unified Communications
Manager.
RTCP works in conjunction with
RTP to provide QoS data (such as
jitter, latency, and round trip delay)
on RTP streams.
Real-Time Control Protocol
(RTCP)
Like other VoIP protocols, SIP is
designed to address the functions
of signaling and session
management within a packet
telephony network. Signaling
allows call information to be
carried across network boundaries.
Session management provides the
ability to control the attributes of
an end-to-end call.
You can configure the Cisco
Unified IP Phone to use either SIP
or Skinny Client Control Protocol
(SCCP).
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.
Session Initiation Protocol (SIP)
Cisco Unified IP Phone 6901 and
6911 use SCCP, version 20 for call
control.
SCCP includes a messaging set that
allows communications between
call control servers and endpoint
clients such as IP Phones. SCCP is
proprietary to Cisco Systems.
Skinny Client Control Protocol
(SCCP)
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Cisco Unified IP Phone
Network Protocols

Usage notesPurposeNetwork Protocol
Cisco Unified IP Phones use TCP
to connect to Cisco Unified
Communications Manager.
TCP is a connection-oriented
transport protocol.
Transmission Control Protocol
(TCP)
When security is implemented,
Cisco Unified IP Phones use the
TLS protocol when securely
registering with Cisco
Unified Communications Manager.
For more information, see the
Cisco Unified Communications
Manager Security Guide.
TLS is a standard protocol for
securing and authenticating
communications.
Transport Layer Security (TLS)
TFTP requires a TFTP server in
your network, which can be
automatically identified from the
DHCP server. If you want a phone
to use a TFTP server other than the
one specified by the DHCP server,
you must manually assign the IP
address of the TFTP server by using
the Network Configuration menu
on the phone.
For more information, go to the
“Cisco TFTP” chapter in the Cisco
Unified Communications Manager
System Guide.
TFTP allows you to transfer files
over the network.
On the Cisco Unified IP Phone,
TFTP enables you to obtain a
configuration file specific to the
phone type.
Trivial File Transfer Protocol
(TFTP)
Cisco Unified IP Phones transmit
and receive RTP streams, which
use UDP.
UDP is a connectionless messaging
protocol for delivery of data
packets.
User Datagram Protocol (UDP)
Related Topics
Cisco Unified IP Communications Product Interactions
Phone Startup Process
Cisco Unified IP Phone 6901 and 6911 Supported Features
Cisco Unified IP Phones function much like a digital business phone, allowing you to place and receive phone
calls. In addition to traditional telephony features, the Cisco Unified IP Phone includes features that enable
you to administer and monitor the phone as a network device.
Feature Overview
Cisco Unified IP Phones provide traditional telephony functionality, Call Forward, Transfer, Redial, Conference,
and voice message system access. Cisco Unified IP Phones also provide a variety of other features. For more
Cisco Unified IP Phone
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Cisco Unified IP Phone
Cisco Unified IP Phone 6901 and 6911 Supported Features

information on the features, see the Cisco Unified IP Phone 6901 and 6911 User Guide for Cisco Unified
Communications Manager (SCCP and SIP).
As with other network devices, you must configure Cisco Unified IP Phones to prepare them to access
Cisco Unified Communications Manager and the rest of the IP network. By using DHCP, you have fewer
settings to configure on a phone, but if your network requires it, you can manually configure information,
such as an IP address, TFTP server, and subnet information.
Finally, because the Cisco Unified IP Phone is a network device, you can obtain detailed status information
from the phone directly. This information can assist you with troubleshooting any problems users might
encounter when using their IP Phones.
Related Topics
Cisco Unified IP Phone Settings
Features, Templates, Services, and User Setup
Troubleshooting and Maintenance
Telephony Feature Administration
You can modify additional settings for the Cisco Unified IP Phone from Cisco Unified Communications
Manager. Use Cisco Unified Communications Manager to set up phone registration criteria and calling search
spaces, among other tasks.
For more information about Cisco Unified Communications Manager, see the Cisco Unified Communications
Manager documentation, including Cisco Unified Communications Manager Administration Guide. You can
also use the context-sensitive help available within the application for guidance.
Related Topics
Telephony Features Available for Cisco Unified IP Phone
Related Documentation
Cisco Unified IP Phone Network Parameters
You configure parameters such as DHCP, TFTP, and IP settings on the phone.
Related Topics
Cisco Unified IP Phone Settings
Information for End Users
If you are a system administrator, you are likely the primary source of information for Cisco Unified IP Phone
users in your network or company. To ensure that you distribute the most current feature and procedural
information, familiarize yourself with Cisco Unified IP Phone documentation on the Cisco Unified IP Phone
web site.
In addition to providing documentation, you should inform users about the features enabled on the phones,
including those specific to your company or network. You should also give users instructions on how to access
and customize the features, if appropriate. You might want to use an internal support web site to keep your
users informed.
Related Topics
Internal Support Web Site
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Cisco Unified IP Phone
Telephony Feature Administration

Cisco Unified IP Phone 6900 Series Documentation
Cisco Unified IP Phones Security Features
Implementing security in the Cisco Unified Communications Manager system prevents identity theft of the
phone and Cisco Unified Communications Manager server, prevents data tampering, and prevents call signaling
and media stream tampering.
To alleviate these threats, the Cisco IP telephony network establishes and maintains authenticated and encrypted
communication streams between a phone and the server, digitally signs files before they are transferred to a
phone, and encrypts media streams and call signaling between Cisco Unified IP Phones.
The Cisco Unified IP Phone 6901 and 6911 use the Phone security profile, which defines whether the device
is nonsecure, authenticated, or encrypted. For information on applying the security profile to the phone, see
the Cisco Unified Communications Manager Security Guide.
If you configure security-related settings in Cisco Unified Communications Manager, the phone configuration
file contains sensitive information. To ensure the privacy of a configuration file, you must configure it for
encryption. For detailed information, see the “Configuring Encrypted Phone Configuration Files” chapter in
Cisco Unified Communications Manager Security Guide.
The following table shows where you can find additional information about security in this and other documents.
Table 2: Cisco Unified IP Phone and Cisco Unified Communications Manager Security Topics
ReferenceTopic
Troubleshooting Guide for Cisco Unified
Communications Manager and Cisco Unified
Communications Manager Security Guide
Detailed explanation of security, including set up,
configuration, and troubleshooting information for
Cisco Unified Communications Manager and Cisco
Unified IP Phones
Supported Security Features, on page 17Security features supported on the Cisco Unified IP
Phone
See Supported Security Features, on page 17 for an
overview of the security features supported by the
Cisco Unified IP Phone 6901 and 6911. For more
information about these features and about Cisco
Unified Communications Manager and Cisco Unified
IP Phone security, refer to the Cisco Unified
Communications Manager Security Guide.
Viewing a security profile name
Authenticated, Encrypted, and Protected Phone Calls,
on page 20
Identifying phone calls for which security is
implemented
•Network Protocols, on page 10
•Cisco Unified Communications Manager Phone
Addition Methods
TLS connection
Phone Startup ProcessSecurity and the phone startup process
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Cisco Unified IP Phone
Cisco Unified IP Phones Security Features

ReferenceTopic
Cisco Unified Communications Manager Phone
Addition Methods
Security and phone configuration files
Disable and Enable Web Page AccessDisabling access to phone web pages
•Troubleshooting and Maintenance
•Troubleshooting Guide for Cisco Unified
Communications Manager
Troubleshooting
Cisco Unified IP Phone Reset or RestoreDeleting the CTL file from the phone
Cisco Unified IP Phone Reset or RestoreResetting or restoring the phone
•802.1X Authentication, on page 22
•Troubleshooting and Maintenance
802.1X Authentication for Cisco Unified IP Phones
Supported Security Features
The following table provides an overview of the security features that the Cisco Unified IP Phone 6901 and
6911 support. For more information about these features and about Cisco Unified Communications Manager
and Cisco Unified IP Phone security, see the Cisco Unified Communications Manager Security Guide.
Most security features are available only if the phone contains a certificate trust list (CTL). For more information
about the CTL, see the “Configuring the Cisco CTL Client” chapter in Cisco Unified Communications Manager
Security Guide.
Note
Table 3: Overview of Security Features
DescriptionFeature
Signed binary files (with the extension .zz.sgn)
prevent tampering with the firmware image before it
is loaded on a phone. Tampering with the image
causes a phone to fail the authentication process and
reject the new image.
Image authentication
Each Cisco Unified IP Phone requires a unique
certificate for device authentication. Phones include
a manufacturing installed certificate (MIC), but for
additional security, you can specify in Cisco
Unified Communications Manager Administration
that a certificate be installed by using the Certificate
Authority Proxy Function (CAPF).
Customer-site certificate installation
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Cisco Unified IP Phone
Supported Security Features

DescriptionFeature
Occurs between the Cisco Unified Communications
Manager server and the phone when each entity
accepts the certificate of the other entity. Determines
whether a secure connection between the phone and
a Cisco Unified Communications Manager should
occur and, if necessary, creates a secure signaling path
between the entities by using TLS protocol. Cisco
Unified Communications Manager will not register
phones unless they can be authenticated by the Cisco
Unified Communications Manager.
Device authentication
Validates digitally signed files that the phone
downloads. The phone validates the signature to make
sure that file tampering did not occur after the file
creation. Files that fail authentication are not written
to flash memory on the phone. The phone rejects
unauthenticated files without further processing.
File authentication
Uses the TLS protocol to validate that no tampering
has occurred to signaling packets during transmission.
Signaling Authentication
Each Cisco Unified IP Phone contains a unique
manufacturing installed certificate (MIC), which is
used for device authentication. The MIC is a
permanent unique proof of identity for the phone, and
allows Cisco Unified Communications Manager to
authenticate the phone.
Manufacturing installed certificate
After you configure a Cisco Unified Survivable
Remote Site Telephony (SRST) reference for security
and reset the dependent devices in Cisco Unified
Communications Manager, the TFTP server adds the
SRST certificate to the phone configuration file and
sends the file to the phone. A secure phone uses a TLS
connection to interact with the SRST-enabled router.
The configuration file uses one of the following
extensions:
• .cnf.xml
• .cnf.xml.sgn
• .cnf.xml.enc.sgn
Secure SRST reference
Uses SRTP to ensure that the media streams between
supported phones proves secure and that only the
intended phone receives and reads the data. Includes
creating a media primary key pair for the phones,
delivering the keys to the phones, and securing the
delivery of the keys while the keys are in transport.
Media encryption
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Cisco Unified IP Phone
Supported Security Features

DescriptionFeature
Ensures that all SCCP and SIP signaling messages
sent between the phone and the Cisco Unified
Communications Manager server are encrypted.
Signaling encryption
Implements parts of the certificate generation
procedure that are too processing-intensive for the
phone, and interacts with the phone for key generation
and certificate installation. The CAPF can be
configured to request certificates from
customer-specified certificate authorities on behalf of
the phone, or it can be configured to generate
certificates locally.
Certificate Authority Proxy Function (CAPF)
Defines whether the phone is nonsecure, authenticated,
encrypted, or protected.
Security profiles
Ensures the privacy of phone configuration files.Encrypted configuration files
Prevents access to a phone web page that displays a
variety of operational statistics for the phone.
Optional disabling of the web server functionality for
a phone
The following is an additional security option that
you control from Cisco Unified Communications
Manager:
• Disabling access to web pages for a phone
Phone hardening
Defines the use of 802.1X authentication to request
and gain access to the network.
802.1X Authentication
Voice Quality Metrics
Objective estimate of the Mean Opinion Score (MOS)
for Listening Quality (LQK) that ranks audio quality
from 5 (excellent) to 1 (bad). This score is based on
audible-concealment events due to a frame loss in the
preceding 8 seconds of the voice stream.
The MOS LQK score can vary based on
the type of codec that the
Cisco Unified IP Phone uses.
Note
MOS LQK
Average MOS LQK score for the entire voice stream.Avg MOS LQK
Lowest MOS LQK score from the start of the voice
stream.
Min MOS LQK
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Cisco Unified IP Phone
Supported Security Features

DescriptionFeature
Baseline or highest MOS LQK score from the start
of the voice stream.
The following codecs provide the corresponding
maximum MOS LQK scores under normal conditions
with no frame loss:
• G.711: 4.5
• G.728/iLBC: 3.9
• G729A/AB: 3.7
Max MOS LQK
Version of the Cisco-proprietary algorithm used to
calculate the MOS LQK scores.
MOS LQK Version
Related Topics
Cisco Unified IP Phones Security Features, on page 16
Security Profiles, on page 20
802.1X Authentication, on page 22
Authenticated, Encrypted, and Protected Phone Calls, on page 20
Cisco Unified IP Phone Security
Security Profiles
All Cisco Unified IP Phones that support Cisco Unified Communications Manager use a security profile,
which defines whether the phone is nonsecure, authenticated, or encrypted. For information about configuring
the security profile and applying the profile to the phone, see the Cisco Unified Communications Manager
Security Guide.
To view the phone security mode, you can view the security profile in Cisco Unified Communications Manager.
Related Topics
Authenticated, Encrypted, and Protected Phone Calls, on page 20
Authenticated, Encrypted, and Protected Phone Calls
In an authenticated call, all devices participating in the establishment of the call are trusted devices, and
authenticated by Cisco Unified Communications Manager.
In an encrypted call, all devices participating in the establishment of the call are trusted devices, and
authenticated by Cisco Unified Communications Manager. In addition, call signaling and media streams are
encrypted. An encrypted call offers a high level of security, providing integrity and privacy to the call.
If the call is routed through non-IP call legs, for example, PSTN, the call may be nonsecure even though it is
encrypted within the IP network.
In a protected call, a security tone plays at the beginning of a call to indicate that the other connected phone
is also receiving and transmitting encrypted audio and video (if video is involved). If your call is connected
to a non-protected phone, the security tone does not play.
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20
Cisco Unified IP Phone
Security Profiles