This chapter covers the following topics:
Chapter 16, "Troubleshooting Basic Cisco IPC Express Features," explained the basic operation of the Cisco CallManager Express (CME) system. It also looked at some of the problems you might encounter during the registration of IP phones, configuration of network technologies such as Dynamic Host Configuration Protocol (DHCP) and virtual LANs (VLANs), and basic considerations for the correct operation of the Cisco IPC Express GUI. At this point, your phones should be successfully registered to the Cisco CME system and operational.
The next step is to expand your basic two-phone system to a completely functional telephony system suited to your needs. The requirements can vary from system to system, so the potential problems also vary. This chapter explores the issues that may arise while adding configuration and features to a basic Cisco CME system.
Before learning about advanced Cisco CME troubleshooting, one of the most important concepts to understand is the difference between an ephone and an ephone-dn and how these fit into the Cisco IOS software voice architecture. Chapter 5, "Cisco CME Call Processing Features," covered the basic building blocks of a Cisco CME system; you should read it before this chapter. In review
The need to troubleshoot Cisco CME is most likely to arise out of features such as the following:
This chapter discusses how to troubleshoot some of the problems you may encounter in these areas.
Dialplan Pattern Configuration Problems