This chapter helps you install the Cisco Unified IP Phone on an IP telephony network.
Before you install a Cisco Unified IP Phone, you must decide how to
configure the phone in your network. Then you can install the phone and verify
its functionality. For more information, see
Cisco Unified IP Phones and telephony networks
For the Cisco Unified IP Phone to successfully operate as a
Cisco Unified IP Phone endpoint in your network, your network must meet these
Working VoIP network:
VoIP configured on your Cisco routers and gateways
Cisco Unified Communications Manager 4.x and later installed in
your network and configured to handle call processing
IP network that supports
DHCP or manual assignment of IP address, gateway, and subnet mask
The Cisco Unified IP Phone displays the date and time from
Cisco Unified Communications Manager. The time displayed on the phone can differ from the Cisco Unified Communications Manager time by up to 10 seconds. The Cisco Unified Communications
Manager server does not display the local time if it is located in a different time zone than the phones.
Cisco Unified Communications Manager Setup
The Cisco Unified IP Phone requires Cisco Unified
Communications Manager to handle call processing. To ensure that
Cisco Unified Communications Manager is set up properly to manage the phone and
route and process calls, see the
Cisco Unified Communications Manager Administration Guide or
the context-sensitive help in the Cisco Unified Communications Manager
If you plan to use autoregistration, verify that it is enabled
and properly configured in Cisco Unified Communications Manager Administration
before connecting any Cisco Unified IP Phone to the network. For information
about enabling and configuring autoregistration, see the
Cisco Unified Communications Manager Administration Guide.
You must use Cisco Unified Communications Manager
Administration to configure and assign telephony features to the Cisco Unified
In Cisco Unified Communications Manager Administration, you can
add users to the database and associate them with specific phones. In this way,
users gain access to Cisco Unified Communications Manager User Option Pages
that allow them to configure items such as call forward, speed dial, and voice
message system options.
The back of the Cisco Unified IP Phone includes these ports:
Network port: Labeled 10/100 SW
Access port: Labeled 10/100 PC
Each port supports 10/100 Mbps half- or full-duplex connections
to external devices. You can use either Category 3 or 5 cabling for 10-Mbps
connections, but you must use Category 5 for 100 connections.
Use the SW network port to connect the phone to the network.
You must use a straight-through cable on this port. The phone can also obtain
inline power from a switch over this connection. For details, see
Cisco Unified IP Phone Power.
Use the PC access port to connect a network device, such as a
computer, to the phone. You must use a straight-through cable on this port.
The handset is designed especially for use with the Cisco Unified IP Phone 7931G. It includes a light strip that indicates incoming calls and voice messages waiting.
To connect a handset to the Cisco Unified IP Phone, plug the cable into the handset and the Handset port on the back of the phone.
The handset does not support wideband audio.
By default, the speakerphone is enabled on the Cisco Unified IP
To disable the speakerphone using Cisco Unified CM
Administration, perform the following procedure:
Device > Phone
and locate the phone you want to modify.
In the Phone Configuration window, check Disable Speakerphone.
Although Cisco performs internal testing of third-party
headsets for use with the Cisco Unified IP Phones, Cisco does not certify or
support products from headset or handset vendors.
We recommend the use of good-quality external devices; for
example, headsets that are screened against unwanted radio frequency (RF) and
audio frequency (AF) signals. Depending on the quality of headsets and their
proximity to other devices, such as mobile phones and two-way radios, some
audio noise or echo can still occur.
An audible hum or buzz may be heard by the remote party, or the
remote party and the Cisco Unified IP Phone user. A range of outside sources
such as electric lights, electric motors, or PC monitors can cause humming or
buzzing sounds. (In some cases, hum can be reduced or eliminated by using a
local power cube or power injector.)
The Cisco Unified IP Phone 7931G supports wideband headsets.
These environmental and hardware inconsistencies in the
locations where Cisco Unified IP Phones are deployed means that not one single
headset solution is optimal for all environments.
We recommend that customers test headsets in their intended
environment to determine performance before making a purchasing decision and
deploying en mass.
Beyond physical, mechanical, and technical performance, the audio portion of a headset must sound good to the user and to the party on the far end. Sound quality is subjective and Cisco cannot guarantee the performance of any headsets. However, a variety of headsets from leading headset manufacturers are reported to perform well with Cisco Unified IP Phones.
You can use the headset with all of the features on the
Cisco Unified IP Phone, including the Volume and Mute buttons. Use these
buttons to adjust the ear piece volume and to mute the speech path from the
To connect a headset to the Cisco Unified IP Phone,
Plug the headset into the Headset port on the back of the phone.
Headset button on the phone to place and
answer calls using the headset.
You can disable the headset by using Cisco Unified
Communications Manager Administration.
To disable the headset, perform the following steps:
Device > Phone
and locate the phone you want to modify.
In the Phone Configuration window, check the
Disable Speakerphone and Headset check box.
External device use
Cisco recommends the use of good quality external devices, such as speakers, microphones, and headsets that are shielded (screened) against unwanted radio frequency (RF) and audio frequency (AF) signals.
Depending on the quality of these devices and their proximity to other devices, such as mobile phones or two-way radios, some audio noise may still occur. In these cases, Cisco recommends that you take one or more of the following actions:
Move the external device away from the source of the RF or AF signals.
Route the external device cables away from the source of the RF or AF signals.
Use shielded cables for the external device, or use cables with a better shield and connector.
Shorten the length of the external device cable.
Apply ferrites or other such devices on the cables for the external device.
Cisco cannot guarantee the performance of the system because Cisco has no control over the quality of external devices, cables, and connectors. The system performs adequately when suitable devices are attached with good quality cables and connectors.
In European Union countries, use only external headsets that are fully compliant with the EMC Directive [89/336/EC].
The following figure and table show how to connect your phone.
DC Adaptor port (DC48V)
Network port (10/100 SW)
Access port (10/100 PC)
Phone Cable Lock
You can secure the Cisco Unified IP Phone to a desktop using a
laptop cable lock. The lock connects to the security slot on the back of the
phone, and the cable can be secured to a desktop.
The security slot can accommodate a lock up to 20 mm.
Compatible laptop cable locks include the Kensington laptop cable lock and
laptop cable locks from other manufacturers that can fit into the security slot
on the back of the phone. See the following figure.
Figure 1. Connecting a Cable Lock to the Cisco Unified IP Phone
Mount Phone on Wall
You can mount the Cisco Unified IP Phone on the wall using special brackets that are available in a Cisco Unified IP Phone wall mount kit. Wall mount kits must be ordered separately from the phones.
You can also attach the phone to the will without a wall mount kit. In either case, you need the following tools and parts:
Screws to secure the Cisco Unified IP Phone to the wall (included with the wall mount kit
To mount the phone on the wall without using the wall mount kit, follow these steps:
Use care to not damage wires or pipes located inside the wall when securing screws to wall studs.
Remove the footstand if it is attached to the phone.
To remove the footstand, disengage the footstand tabs from the phone by grasping and gently squeezing the footstand at the top and bottom, near where the stand attaches to the phone.
Insert two screws into a wall stud, matching them to the two screw holes on the back of the phone.
The holes fit standard phone jack mounts.
Hang the phone on the wall.
Phone Startup Verification
After the Cisco Unified IP Phone has power connected to it,
the phone begins its startup process by cycling through these steps.
These buttons flash on and off in sequence:
Line 1 (amber)
The phone screen displays the Cisco Systems, Inc., logo screen.
These messages display as the phone starts:
Verifying load (if the
phone load does not match the load on the TFTP server). If this message
displays, the phone start up again and repeats steps 1 and 2 above. The phone
also displays the download progress and names of files it downloads and
Updating the Trust List.
Configuring CM Unified
The main phone screen displays:
Current date and time
Primary directory number
numbers and speed dial numbers, if configured
If the phone successfully passes through these stages, it has
started up properly. If the phone does not start up properly, see the
If you are not using DHCP in your network, you must configure
these network settings on the Cisco Unified IP Phone after installing the phone
on the network:
IP subnet information (subnet mask for IPv4 and subnet prefix length
Default gateway IP address
TFTP server IP address
You also may configure the domain name and the DNS server
settings, if necessary.
The security features protect against several threats,
including threats to the identity of the phone and to data. These features
establish and maintain authenticated communication streams between the phone
and the Cisco Unified Communications Manager server, and digitally sign files
before they are delivered.
You can initiate the installation of an Locally Significant
Certificate (LSC) from the Security Configuration menu on the phone. This menu
also lets you update or remove an LSC.
Make sure that the appropriate Cisco Unified Communications
Manager and the Certificate Authority Proxy Function (CAPF) security
configurations are complete:
The CTL or ITL file should
have a CAPF certificate.
The CAPF certificate must
exist in the /usr/local/cm/.security/certs folder in every server in
The CAPF is running and
For more information, see the
Cisco Unified Communications Manager Security Guide.
To configure an LSC on the phone manually, perform the
following procedure. Depending on how you have configured the CAPF, this
procedure installs an LSC, updates an existing LSC, or removes an existing LSC.
To configure an LSC on the phone, follow these steps:
Before You Begin
Before You Begin
Obtain the CAPF authentication code that was set when the CAPF was
From the phone, press the
Applications Menu button, then choose
Settings > Security
You can control access to the Settings Menu by using the
Settings Access field in the Cisco Unified Communications Manager
Administration Phone Configuration Settings window. For more information, see
Cisco Unified Communications Manager Administration
**# to unlock settings on the Security
If a Settings Menu password has been set up, SIP phones present
"Enter password" prompt after you enter
Scroll to LSC and press the
Update softkey. The phone prompts for an
Enter the authentication code and press the
The phone begins to install, update, or remove the LSC, depending
on how the CAPF was configured. During the procedure, a series of messages
appears in the LSC option field in the Security Configuration menu so that you
can monitor progress. When the procedure completes successfully, the phone
displays Installed or Not Installed.
The LSC install, update, or removal process can take a long time
to complete. You can stop the process at any time by pressing the
Stop softkey from the Security Configuration menu. (Settings must
be unlocked before you can press this softkey.)
When the phone successfully completes the installation procedure,
"Success." If the phone displays
"Failure," the authorization string may be incorrect or the
phone may not be enabled for upgrading. Refer to error messages generated by
the CAPF and take appropriate actions.
You can verify that an LSC is installed on the phone by pressing
Applications Menu button, choosing
Settings > Model
Information, and ensuring that the LSC setting shows