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Summary, Explanation, The SW Port Configuration option in the Network Configuration menu

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Chapter 9 Troubleshooting and Maintenance General Troubleshooting Tips Table 9-2 Cisco Unified IP Phone Troubleshooting (continued) Summary Codec mismatch between the phone and another device. Sound sample mismatch between the phone and another device. Gaps in voice calls. Loopback condition. One-way audio. Peer Firmware Sharing fails. Cisco VT Advantage/Unified Video Advantage (CVTA) Explanation The RxType and the TxType statistics show the codec that is being used for a conversation between this Cisco Unified IP phone and the other device. The values of these statistics should match. If they do not, verify that the other device can handle the codec conversation, or that a transcoder is in place to handle the service. See Call Statistics Screen, page 7-13 for information about displaying these statistics. The RxSize and the TxSize statistics show the size of the voice packets that are being used in a conversation between this Cisco Unified IP phone and the other device. The values of these statistics should match. See Call Statistics Screen, page 7-13 for information about displaying these statistics. Check the AvgJtr and the MaxJtr statistics. A large variance between these statistics might indicate a problem with jitter on the network or periodic high rates of network activity. See Call Statistics Screen, page 7-13 for information about displaying these statistics. A loopback condition can occur when the following conditions are met: • The SW Port Configuration option in the Network Configuration menu on the phone is set to 10 Half (10-BaseT / half duplex) • The phone receives power from an external power supply • The phone is powered down (the power supply is disconnected) In this case, the switch port on the phone can become disabled and the following message will appear in the switch console log: HALF_DUX_COLLISION_EXCEED_THRESHOLD To resolve this problem, re-enable the port from the switch. When at least one person in a call does not receive audio, IP connectivity between phones is not established. Check the configurations in routers and switches to ensure that IP connectivity is properly configured. If the Peer Firmware Sharing fails, the phone will default to using the TFTP server to download firmware. Access the log messages stored on the remote logging machine to help debug the Peer Firmware Sharing feature. Note These log messages are different than the log messages sent to the phone log. If you are having problems getting CVTA to work, make sure that the PC Port is enabled, and that CDP is enabled on the PC port. See Network Configuration Menu, page 4-5 for more information. OL-21011-01 Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.0 (SCCP and SIP) 9-11

Section	Page
Cisco Unified IP Phone Administration Guide for Cisco Unified CM 8.0 (SCCP and SIP)	1
Contents	3
Preface	11
Overview	11
Audience	11
Organization	11
Related Documentation	12
Obtaining Documentation, Obtaining Support, and Security Guidelines	13
Cisco Product Security Overview	13
Document Conventions	13
An Overview of the Cisco Unified IP Phone	15
Understanding the Cisco Unified IP Phone 7962G and 7942G	16
What Networking Protocols are Used?	19
IPv6 Support on Cisco Unified IP Phones	22
What Features are Supported on the Cisco Unified IP Phone 7962G and 7942G?	23
Feature Overview	23
Configuring Telephony Features	24
Configuring Network Parameters Using the Cisco Unified IP Phone	24
Providing Users with Feature Information	25
Understanding Security Features for Cisco Unified IP Phones	25
Overview of Supported Security Features	27
Understanding Security Profiles	29
Identifying Authenticated, Encrypted, and Protected Phone Calls	29
Establishing and Identifying Secure Conference Calls	30
Establishing and Identifying Protected Calls	30
Call Security Interactions and Restrictions	31
Supporting 802.1X Authentication on Cisco Unified IP Phones	32
Overview	32
Required Network Components	33
Best Practices-Requirements and Recommendations	33
Security Restrictions	34
Overview of Configuring and Installing Cisco Unified IP Phones	34
Configuring Cisco Unified IP Phones in Cisco Unified Communications Manager	34
Checklist for Configuring the Cisco Unified IP Phone 7962G and 7942G in Cisco Unified Communications Manager Administrations	35
Installing Cisco Unified IP Phones	37
Checklist for Installing the Cisco Unified IP Phone 7962G and 7942G	38
Preparing to Install the Cisco Unified IP Phone on Your Network	43
Understanding Interactions with Other Cisco Unified IP Telephony Products	43
Understanding How the Cisco Unified IP Phone Interacts with Cisco Unified Communications Manager	44
Understanding How the Cisco Unified IP Phone Interacts with the VLAN	44
Providing Power to the Cisco Unified IP Phone	45
Power Guidelines	46
Power Outage	46
Obtaining Additional Information about Power	47
Understanding Phone Configuration Files	47
Understanding the Phone Startup Process	49
Adding Phones to the Cisco Unified Communications Manager Database	50
Adding Phones with Auto-Registration	51
Adding Phones with Auto-Registration and TAPS	52
Adding Phones with Cisco Unified Communications Manager Administration	53
Adding Phones with BAT	53
Using Cisco Unified IP Phones with Different Protocols	54
Converting a New Phone from SCCP to SIP	54
Converting an In-Use Phone from One Protocol to the Other	54
Deploying a Phone in an SCCP and SIP Environment	55
Determining the MAC Address for a Cisco Unified IP Phone	55
Setting Up the Cisco Unified IP Phone	57
Before You Begin	57
Network Requirements	57
Cisco Unified Communications Manager Configuration	58
Understanding the Cisco Unified IP Phone Components	58
Network and Access Ports	58
Handset	59
Speakerphone	59
Headset	60
Audio Quality Subjective to the User	60
Connecting a Headset	60
Disabling a Headset	61
Enabling a Wireless Headset on the Cisco Unified IP Phones 7962G and 7942G	61
Using External Devices	61
Installing the Cisco Unified IP Phone	61
Attaching a Cisco Unified IP Phone Expansion Module	64
Feature Key Capacity Increase for Cisco Unified IP Phones	65
Adjusting the Placement of the Cisco Unified IP Phone	66
Adjusting Cisco Unified IP Phone Placement on the Desktop	66
Securing the Phone with a Cable Lock	66
Mounting the Phone to the Wall	67
Verifying the Phone Startup Process	69
Configuring Startup Network Settings	70
Configuring Security on the Cisco Unified IP Phone	70
Configuring Settings on the Cisco Unified IP Phone	73
Configuration Menus on the Cisco Unified IP Phone	73
Displaying a Configuration Menu	74
Unlocking and Locking Options	74
Editing Values	75
Overview of Options Configurable from a Phone	76
Network Configuration Menu	77
Understanding DHCPv6 and Autoconfiguration	88
Device Configuration Menu	89
Unified CM Configuration Menu	90
SIP Configuration Menu for SIP Phones Only	91
SIP General Configuration Menu	91
Line Settings Menu for SIP Phones	92
Call Preferences Menu for SIP Phones	93
HTTP Configuration Menu	94
Locale Configuration Menu	95
NTP Configuration Menu for SIP Phones	96
UI Configuration Menu	97
Media Configuration Menu	99
Ethernet Configuration Menu	102
Security Configuration Menu	102
QoS Configuration Menu	104
Network Configuration Menu	105
Security Configuration Menu	110
CTL File Submenu	111
ITL File Submenu	112
Trust List Menu	114
802.1X Authentication and Status	115
VPN Configuration	116
Configuring Features, Templates, Services, and Users	119
Telephony Features Available for the Cisco Unified IP Phone	119
Configuring Product Specific Configuration Parameters	137
Configuring Corporate and Personal Directories	138
Configuring Corporate Directories	139
Configuring Personal Directory	139
Modifying Phone Button Templates	140
Modifying a Phone Button Template for Personal Address Book or Fast Dials	141
Configuring Softkey Templates	142
Setting Up Services	143
Adding Users to Cisco Unified Communications Manager	143
Managing the User Options Web Pages	144
Giving Users Access to the User Options Web Pages	144
Specifying Options that Appear on the User Options Web Pages	145
Customizing the Cisco Unified IP Phone	147
Customizing and Modifying Configuration Files	147
Creating Custom Phone Rings	148
Ringlist.xml File Format Requirements	148
PCM File Requirements for Custom Ring Types	149
Configuring a Custom Phone Ring	149
Creating Custom Background Images	149
List.xml File Format Requirements	150
PNG File Requirements for Custom Background Images	150
Configuring a Custom Background Image	151
Configuring Wideband Codec	152
Viewing Model Information, Status, and Statistics on the Cisco Unified IP Phone	153
Model Information Screen	154
Status Menu	154
Status Messages Screen	155
Network Statistics Screen	161
Firmware Versions Screen	163
Expansion Module Status Screen	164
Call Statistics Screen	165
Using Test Tone	167
Monitoring the Cisco Unified IP Phone Remotely	171
Accessing the Web Page for a Phone	172
Disabling and Enabling Web Page Access	173
Configuring the Cisco Unified IP Phone to use HTTP/HTTPS Protocols	174
Device Information	174
Network Configuration	175
Network Statistics	178
Device Logs	180
Streaming Statistics	181
Troubleshooting and Maintenance	185
Resolving Startup Problems	185
Symptom: The Cisco Unified IP Phone Does Not Go Through its Normal Startup Process	186
Symptom: The Cisco Unified IP Phone Does Not Register with Cisco Unified Communications Manager	186
Identifying Error Messages	187
Checking Network Connectivity	187
Verifying TFTP Server Settings	187
Verifying IP Addressing and Routing	187
Verifying DNS Settings	188
Verifying Cisco Unified Communications Manager Settings	188
Cisco CallManager and TFTP Services Are Not Running	188
Creating a New Configuration File	189
Registering the Phone with Cisco Unified Communications Manager	189
Symptom: Cisco Unified IP Phone Unable to Obtain IP Address	190
Cisco Unified IP Phone Resets Unexpectedly	190
Verifying the Physical Connection	190
Identifying Intermittent Network Outages	190
Verifying DHCP Settings	191
Checking Static IP Address Settings	191
Verifying the Voice VLAN Configuration	191
Verifying that the Phones Have Not Been Intentionally Reset	191
Eliminating DNS or Other Connectivity Errors	191
Checking Power Connection	192
Troubleshooting Cisco Unified IP Phone Security	192
General Troubleshooting Tips	194
General Troubleshooting Tips for the Cisco Unified IP Phone Expansion Module	196
Resetting or Restoring the Cisco Unified IP Phone	197
Performing a Basic Reset	197
Performing a Factory Reset	197
Using the Quality Report Tool	198
Monitoring the Voice Quality of Calls	199
Using Voice Quality Metrics	199
Troubleshooting Tips	200
Where to Go for More Troubleshooting Information	201
Cleaning the Cisco Unified IP Phone	201
Providing Information to Users Via a Website	203
How Users Obtain Support for the Cisco Unified IP Phone	203
Giving Users Access to the User Options Web Pages	203
How Users Access the Online Help System on the Cisco Unified IP Phone	204
How Users Get Copies of Cisco Unified IP Phone Manuals	204
Accessing Cisco 7900 Series Unified IP Phone eLearning Tutorials for SCCP Phones Only	204
How Users Subscribe to Services and Configure Phone Features	205
How Users Access a Voice Messaging System	205
How Users Configure Personal Directory Entries	206
Installing and Configuring the Cisco Unified IP Phone Address Book Synchronizer	206
Feature Support by Protocol for Cisco Unified IP Phone 7962G and 7942G	209
Supporting International Users	215
Adding Language Overlays to Phone Buttons	215
Installing the Cisco Unified Communications Manager Locale Installer	215
Support for International Call Logging	216
Technical Specifications	217
Physical and Operating Environment Specifications	217
Cable Specifications	218
Network and Access Port Pinouts	218
Basic Phone Administration Steps	221
Example User Information for these Procedures	221
Adding a User to Cisco Unified Communications Manager	222
Adding a User From an External LDAP Directory	222
Adding a User Directly to Cisco Unified Communications Manager	222
Configuring the Phone	223
Performing Final End User Configuration Steps	227
Index	228
Symbols	228
Numerics	228
A	228
B	229
C	229
D	230
E	231
F	231
G	232
H	232
I	233
J	233
K	233
L	233
M	234
N	234
O	235
P	235
Q	236
R	236
S	236
T	238
U	239
V	240

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9-11

Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.0 (SCCP and SIP)

OL-21011-01

Chapter 9

Troubleshooting and Maintenance

General Troubleshooting Tips

Codec mismatch between the phone and

another device.

The RxType and the TxType statistics show the codec that is being used for a

conversation between this Cisco Unified IP phone and the other device. The

values of these statistics should match. If they do not, verify that the other

device can handle the codec conversation, or that a transcoder is in place to

handle the service.

See

Call Statistics Screen, page 7-13

for information about displaying these

statistics.

Sound sample mismatch between the

phone and another device.

The RxSize and the TxSize statistics show the size of the voice packets that are

being used in a conversation between this Cisco Unified IP phone and the other

device. The values of these statistics should match.

See

Call Statistics Screen, page 7-13

for information about displaying these

statistics.

Gaps in voice calls.

Check the AvgJtr and the MaxJtr statistics. A large variance between these

statistics might indicate a problem with jitter on the network or periodic high

rates of network activity.

See

Call Statistics Screen, page 7-13

for information about displaying these

statistics.

Loopback condition.

A loopback condition can occur when the following conditions are met:

•

The SW Port Configuration option in the Network Configuration menu on

the phone is set to

10 Half

(10-BaseT / half duplex)

•

The phone receives power from an external power supply

•

The phone is powered down (the power supply is disconnected)

In this case, the switch port on the phone can become disabled and the

following message will appear in the switch console log:

HALF_DUX_COLLISION_EXCEED_THRESHOLD

To resolve this problem, re-enable the port from the switch.

One-way audio.

When at least one person in a call does not receive audio, IP connectivity

between phones is not established. Check the configurations in routers and

switches to ensure that IP connectivity is properly configured.

Peer Firmware Sharing fails.

If the Peer Firmware Sharing fails, the phone will default to using the TFTP

server to download firmware. Access the log messages stored on the remote

logging machine to help debug the Peer Firmware Sharing feature.

Note

These log messages are different than the log messages sent to the

phone log.

Cisco VT Advantage/Unified Video

Advantage (CVTA)

If you are having problems getting CVTA to work, make sure that the PC Port

is enabled, and that CDP is enabled on the PC port.

See

Network Configuration Menu, page 4-5

for more information.

Table 9-2

Cisco Unified IP Phone Troubleshooting (continued)

Summary

Explanation