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Troubleshooting Telephone Issues for Cisco Unified MeetingPlace
How to Resolve Problems with Call Connections
9
 
Both Dial-In and Dial-Out Calls Fail
Problem   
Both dial-in and dial-out calls fail.
Solution   
See the 
.
Solution   
Make sure that the Media Server is correctly configured. 
Solution   
Make sure that the autonegotiation and duplex settings are correctly configured between the 
local switch port and the Cisco Unified MeetingPlace Application Server. . 
To change the duplex settings on the Application Server, log into the CLI as th
 user, and use the 
 command to change the duplex settings. 
Solution   
Make sure that the Cisco Unified MeetingPlace Application Server is connected to a single 
switch port instead of a multiple-device Ethernet bus. Cisco Unified MeetingPlace works best when 
micro-segmented to use a single switch port. Sharing a bus with other devices can cause excessive 
collisions, which reduce bandwidth and cause unpredictable bandwidth availability.
Solution   
Check for and reconfigure any firewalls between the phone and Cisco Unified MeetingPlace.
Possible Cause   
Network congestion. You can take a trace of network traffic as close as possible to 
the Application Server eth0 port.
Solution   
Reduce traffic in the local LAN by adding more switches and distributing the network devices 
between them.
Solution   
Reduce the number of devices (and thus the traffic) on the local LAN by adding more routers 
to create more (but smaller) LANs. There might also be unused ports on the local router, in which case 
more routers are not needed.
Solution   
Change network device settings to reduce unnecessary traffic. For example, add access lists to 
the local router to filter out irrelevant traffic.
Possible Cause   
Bad frames were received.
Some phones provide network error statistics about how many bad frames have been received. See 
if the particular phone has these statistics. If so, see if the phone has registered receiving a large 
number of bad frames.
Solution   
Check the configuration of the device that routes calls to Cisco Unified MeetingPlace. In 
Cisco Unified Communications Manager, make sure that the route patterns and trunks are configured 
correctly. 
Related Topics
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Established Calls Get Dropped
Problem   
Successfully connected calls between users and Cisco Unified MeetingPlace get dropped.
Solution   
See the 
.