Home > Problems > Excessive Delay

Problem: Excessive Delay

High levels of delay (generally over 200 milliseconds round trip) can cause problems with conversational interaction. This may be due to the routing of the IP stream, mis-configuration of the jitter buffer (i.e. too large) at either end of the connection or high levels of jitter which are causing an adaptive jitter buffer to grow excessively large


In the presence of high levels of delay the normal "protocol" of conversation breaks down. In addition, delay can make echo problems more obvious and annoying.


Use traceroute to verify the IP path delay. Check the jitter level for the call and verify the configuration of the jitter buffer. The problem can occasionally be due to VoIP Gateways using excessively large voice packets or aggregating voice frames from many calls into one packet.

Tools: Network Analyzer, Traceroute, VQmon

Back To Top

Conditions of use: The material on this site is copyright VoIP Troubleshooter LLC and may be freely used but not copied or downloaded.  In making use of this site the user acknowledges that VoIP Troubleshooter LLC or Contributor has no liability for any issues or problems that may arise directly or indirectly as a result of such use.  VoIP Troubleshooter LLC and Contributor are providing this material as-is with no warranty as to correctness or completeness and do not accept any responsibility for any issues or problems of any nature whatsoever that may arise from the use of the material on this site.