Cisco 7800 Series Administration Manual page 190

Troubleshooting Procedures
a The Ethernet cable is attached.
b The Third-Party Call Control system is active.
2 Audio server debug and capture logs are enabled for both phones. If needed, enable Java debug.
Phone Does Not Recognize DTMF Digits or Digits Are Delayed
Problem
The user complains that numbers are missed or delayed when the keypad is used.
Cause
Pressing the keys too quickly can result in missed or delayed digits.
Solution
Keys should not be pressed rapidly.
Troubleshooting Procedures
These procedures can be used to identify and correct problems.
Check DHCP Settings
Procedure
Step 1
On the Cisco IP Phone, press Applications
Step 2 Select Admin Settings > Network Setup > IPv4 Setup, and look at the following options:
• DHCP Option: Check the DHCP option for enabled or disabled.
• IP Address, Subnet Mask, Default Router: If you have assigned a static IP address to the phone, you
Step 3 If you are using DHCP, check the IP addresses that your DHCP server distributes.
See the Understanding and Troubleshooting DHCP in Catalyst Switch or Enterprise Networks document,
available at this URL:
http://www.cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a00800f0804.shtml
Verify DNS Settings
To verify DNS settings, follow these steps:
Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide
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must manually enter settings for these options.
.