Cisco Systems 691 User Manual
CHAP T E R
2
Preparing to Install the Cisco Unified IP Phone on
Your Network
Cisco Unified IP Phones enable you to communicate by using voice over a data network. To provide this
capability, the IP Phones depend upon and interact with several other key Cisco Unified IP Telephony
components, including Cisco Unified Communications Manager.
This chapter focuses on the interactions between the Cisco Unified IP Phone 6901 and 6911 and
Cisco Unified Communications Manager, DNS and DHCP servers, TFTP servers, and switches. It also
describes options for powering phones.
For related information about voice and IP communications, refer to this URL:
http://www.cisco.com/en/US/products/sw/voicesw/index.html
This chapter provides an overview of the interaction between the Cisco Unified IP Phone and other key
components of the Voice over IP (VoIP) network. It includes the following topics:
• Understanding Interactions with Other Cisco Unified IP Telephony Products, page 2-1
• Providing Power to the Cisco Unified IP Phone, page 2-3
• Understanding Phone Configuration Files, page 2-5
• Understanding the Phone Startup Process, page 2-6
• Adding Phones to the Cisco Unified Communications Manager Database, page 2-7
• Determining the MAC Address for a Cisco Unified IP Phone, page 2-11
Understanding Interactions with Other Cisco Unified IP Telephony Products
To function in the IP telephony network, the Cisco Unified IP Phone must be connected to a networking
device, such as a Cisco Catalyst switch. You must also register the Cisco Unified IP Phone with a Cisco
Unified Communications Manager system before sending and receiving calls.
This section includes the following topics:
• Understanding How the Cisco Unified IP Phone Interacts with Cisco Unified Communications
Manager, page 2-2
• Understanding How the Cisco Unified IP Phone 6911 Interacts with the VLAN, page 2-2
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Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network
Understanding Interactions with Other Cisco Unified IP Telephony Products
Understanding How the Cisco Unified IP Phone Interacts with Cisco Unified Communications Manager
Cisco Unified Communications Manager is an open and industry-standard call processing system.
Cisco Unified Communications Manager software sets up and tears down calls between phones,
integrating traditional PBX functionality with the corporate IP network. Cisco Unified Communications
Manager manages the components of the IP telephony system—the phones, the access gateways, and the
resources necessary for features such as call conferencing and route planning. Cisco Unified
Communications Manager also provides:
• Firmware for phones
• Configuration file via TFTP service
• Phone registration
• Call preservation, so that a media session continues if signaling is lost between the primary
Communications Manager and a phone
For information about configuring Cisco Unified Communications Manager to work with the IP devices
described in this chapter, go to the Cisco Unified IP Phone Configuration chapter in the
Cisco Communications Manager Administration Guide.
For an overview of security functionality for the Cisco Unified IP Phone, see the “Understanding
Security Features for Cisco Unified IP Phones” section on page 1-10.
Note If the Cisco Unified IP Phone model that you want to configure does not appear in the Phone Type
drop-down list in Cisco Unified Communications Manager Administration, go to the following URL and
install the latest support patch for your version of Cisco Unified Communications Manager:
http://tools.cisco.com/support/downloads/go/Redirect.x?mdfid=278875240
For more information, refer to “Software Upgrades” chapter in the Cisco Unified Communications
Operating System Administration Guide.
Related Topic
• Telephony Features Available for the Cisco Unified IP Phone, page 5-1
Understanding How the Cisco Unified IP Phone 6911 Interacts with the VLAN
The Cisco Unified IP Phone 6911 has an internal Ethernet switch, enabling forwarding of packets to the
phone, and to the access port and the network port on the back of the phone.
Note Cisco Unified IP Phone 6901 does not support VLANs.
If a computer is connected to the access port, the computer and the phone share the same physical link
to the switch and share the same port on the switch. This shared physical link has the following
implications for the VLAN configuration on the network:
2-2
• The current VLANs might be configured on an IP subnet basis. However, additional IP addresses
might not be available to assign the phone to the same subnet as other devices connected to the same
port.
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Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network
• Data traffic present on the VLAN supporting phones might reduce the quality of Voice-over-IP
traffic.
• Network security may indicate a need to isolate the VLAN voice traffic from the VLAN data traffic.
You can resolve these issues by isolating the voice traffic onto a separate VLAN. The switch port that
the phone is connected to would be configured to have separate VLANs for carrying:
• Voice traffic to and from the IP phone (auxiliary VLAN on the Cisco Catalyst 6000 series, for
example)
• Data traffic to and from the PC connected to the switch through the access port of the IP phone
(native VLAN)
Isolating the phones on a separate, auxiliary VLAN increases the quality of the voice traffic and allows
a large number of phones to be added to an existing network where there are not enough IP addresses
for each phone.
For more information, refer to the documentation included with a Cisco switch. You can also access
switch information at this URL:
http://cisco.com/en/US/products/hw/switches/index.html
Related Topics
• Understanding the Phone Startup Process, page 2-6
• Configuring Settings on the Cisco Unified IP Phone, page 4-1
Providing Power to the Cisco Unified IP Phone
Providing Power to the Cisco Unified IP Phone
The Cisco Unified IP Phone 6901 and 6911 can be powered with external power or with Power over
Ethernet (PoE). External power is provided through a separate power supply. PoE is provided by a switch
through the Ethernet cable attached to a phone.
Note When you install a phone that is powered with external power, connect the power supply to the phone
and to a power outlet before you connect the Ethernet cable to the phone. When you remove a phone that
is powered with external power, disconnect the Ethernet cable from the phone before you disconnect the
power supply.
The following sections provide more information about powering a phone:
• Power Guidelines, page 2-4
• Power Outage, page 2-4
• Obtaining Additional Information About Power, page 2-5
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Providing Power to the Cisco Unified IP Phone
Power Guidelines
Table 2 -1 provides guidelines for powering the Cisco Unified IP Phone 6901 and 6911.
Table 2-1 Guidelines for Powering the Cisco Unified IP Phone 6901 and 6911
Power Type Guidelines
External power—Provided
through the CP-PWR-CUBE-3
external power supply.
External power—Provided
through the Cisco Unified IP
Phone Power Injector.
PoE power—Provided by a
switch through the Ethernet
cable attached to the phone.
The Cisco Unified IP Phone 6901 and 6911 use the CP-PWR-CUBE-3 power supply.
The Cisco Unified IP Phone Power Injector may be used with any Cisco Unified IP Phone.
Functioning as a midspan device, the injector delivers inline power to the attached phone.
The Cisco Unified IP Phone Power Injector is connected between a switch port and the IP
Phone, and supports a maximum cable length of 100m between the unpowered switch and
the IP Phone.
• The Cisco Unified IP Phone 6901 and 6911 support Cisco inline PoE.
• The Cisco Unified IP Phone 6901 and 6911 support IEEE 802.3af Class 1 power on
signal pairs and spare pairs.
• To ensure uninterruptible operation of the phone, make sure that the switch has a
backup power supply.
External power—Provided
through inline power patch
panel WS-PWR-PANEL
Power Outage
Your accessibility to emergency service through the phone is dependent on the phone being powered. If
there is an interruption in the power supply, Service and Emergency Calling Service dialing will not
function until power is restored. In the case of a power failure or disruption, you may need to reset or
reconfigure equipment before using the Service or Emergency Calling Service dialing.
• Make sure that the CatOS or IOS version running on your switch supports your
intended phone deployment. Refer to the documentation for your switch for operating
system version information.
The inline power patch panel WS-PWR-PANEL is compatible with the Cisco Unified
IP Phone 6901 and 6911.
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