Table of Contents
xvii
Directory Template ...................................................................................................................... 481
Super Search Template ............................................................................................................... 482
Local Contact File ........................................................................................................................ 484
Remote XML Phone Book ............................................................................................................ 485
Troubleshooting .....................................................................489
Troubleshooting Methods ........................................................................................................... 489
Viewing Log Files .................................................................................................................. 489
Capturing Packets ................................................................................................................ 494
Enabling Watch Dog Feature .............................................................................................. 495
Getting Information from Status Indicators ........................................................................ 497
Analyzing Configuration File ............................................................................................... 497
Troubleshooting Solutions ........................................................................................................... 499
Why is the LCD screen blank? ............................................................................................. 499
Why doesn’t the IP phone get an IP address? ................................................................... 500
Why does the IP phone display “No Service”? ................................................................. 500
How do I find the basic information of the IP phone? ....................................................... 500
Why doesn’t the IP phone upgrade firmware successfully? ............................................. 500
Why doesn’t the IP phone display time and date correctly? ........................................... 500
Why do I get poor sound quality during a call? ................................................................ 501
What is the difference between a remote phone book and a local phone book? ....... 501
What is the difference among user name, register name and display name? ............. 501
How to reboot the IP phone remotely? .............................................................................. 501
Why does the IP phone use DOB format logo file instead of popular BMP, JPG and so on?
................................................................................................................................................ 502
How to increase or decrease the volume? ........................................................................ 502
What will happen if I connect both PoE cable and power adapter? Which has the higher
priority? .................................................................................................................................. 502
What is auto provisioning? .................................................................................................. 502
What is PnP? .......................................................................................................................... 502
Why doesn’t the IP phone update the configuration? ...................................................... 503
What do “on code” and “off code” mean? ....................................................................... 503
How to solve the IP conflict problem? ................................................................................ 503
How to reset the IP phone to factory configurations? ....................................................... 503
How to restore the administrator password? .................................................................... 504
What are the main differences among SIP-T28P, IP-T26P, SIP-T22P and SIP-T20P IP phones?
................................................................................................................................................ 504
Appendix ...............................................................................507
Appendix A: Glossary ................................................................................................................. 507
Appendix B: Time Zones ............................................................................................................. 509
Appendix C: Trusted Certificates ............................................................................................... 511
Appendix D: Configuring DSS Key ............................................................................................. 513
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