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Chapter 1

An Overview of the Cisco Unified IP Phone

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Security Restrictions

A user cannot barge into an encrypted call if the phone that is used to barge is not configured for

encryption. When barge fails in this case, a reorder tone (fast busy tone) plays on the phone on which

the user initiated the barge.

If the initiator phone is configured for encryption, the barge initiator can barge into a nonsecure call from

the encrypted phone. After the barge occurs, Cisco Unified Communications Manager classifies the call

as nonsecure.

If the initiator phone is configured for encryption, the barge initiator can barge into an encrypted call,

and the phone indicates that the call is encrypted.

Overview of Configuring and Installing Cisco Unified IP Phones

When deploying a new IP telephony system, system administrators and network administrators must

complete several initial configuration tasks to prepare the network for IP telephony service. For

information and a checklist for setting up and configuring a Cisco IP telephony network, go to the

System Configuration Overview

After you have set up the IP telephony system and configured system-wide features in Cisco Unified

Communications Manager, you can add IP phones to the system.

Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 8.5 (SIP)

OL-20861-01

Configure PC Port—The 802.1X standard does not take into account the use of VLANs and thus

recommends that only a single device should be authenticated to a specific switch port. However,

some switches (including Cisco Catalyst switches) support multi-domain authentication. The switch

configuration determines whether you can connect a PC to the phone's PC port.

Enabled—If you are using a switch that supports multi-domain authentication, you can enable

–

the PC port and connect a PC to it. In this case, Cisco Unified IP Phones support proxy

EAPOL-Logoff to monitor the authentication exchanges between the switch and the attached

PC. For more information about IEEE 802.1X support on the Cisco Catalyst switches, refer to

the Cisco Catalyst switch configuration guides at:

http://www.cisco.com/en/US/products/hw/switches/ps708/tsd_products_support_series_home.

html

Disabled—If the switch does not support multiple 802.1X-compliant devices on the same port,

–

you should disable the PC Port when 802.1X authentication is enabled. See the

Menu" section on page 7-4

subsequently attempt to attach a PC to it, the switch will deny network access to both the phone

and the PC.

Configure Voice VLAN—Because the 802.1X standard does not account for VLANs, you should

configure this setting based on the switch support.

Enabled—If you are using a switch that supports multi-domain authentication, you can continue

–

to use the voice VLAN.

Disabled—If the switch does not support multi-domain authentication, disable the Voice VLAN

–

and consider assigning the port to the native VLAN. See the

page 7-4

for more information.

Enter MD5 Shared Secret—If you disable 802.1X authentication or perform a factory reset on the

phone, the previously configured MD5 shared secret is deleted. See the

Transaction Status" section on page 7-15

Overview of Configuring and Installing Cisco Unified IP Phones

for more information. If you do not disable this port and

for more information.

chapter in Cisco Unified Communications Manager System Guide.

"Ethernet Setup

"Ethernet Setup Menu" section on

"802.1X Authentication and

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