Phone Does Not Recognize Dtmf Digits Or Digits Are Delayed - Cisco 7800 series Administrator's Manual

Troubleshooting Procedures
Solution
1 Verify the following:
a The Ethernet cable is attached.
b The Cisco CallManager service is running on the Cisco Unified Communications Manager server.
c Both phones are registered to the same Cisco Unified Communications Manager.
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 > Ethernet Setup > IPv4 Setup, and look at the following options:
• DHCP Server: If you have assigned a static IP address to the phone, you do not need to enter a value
• 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:
Cisco IP Phone 7800 Series Administration Guide for Cisco Unified Communications Manager
212
for the DHCP Server option. However, if you are using a DHCP server, this option must have a value.
If no value is found, check your IP routing and VLAN configuration. See the Troubleshooting Switch
Port and Interface Problems document, available at this URL:
http://www.cisco.com/en/US/customer/products/hw/switches/ps708/prod_tech_notes_list.html
must manually enter settings for these options.
.