Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

Cisc CUCM 7.1 Hunt Group Ringing Too Long

Posted on 2011-03-21
6
Medium Priority
?
1,557 Views
Last Modified: 2012-06-27
I have an operations center with 11 phones - 7945G and 7965G.  I have a hunt pilot/list/group setup with Broadcast as the distribution algorithm.  So all the phones rings when a pilot number is dialed.  But the problem is when someone picks up - the phone keeps ringing for one or two more rings after pickup.  And the audio doesn't kick in for another 5 to 10 seconds.  Anyone have a thought on what might be causing the delay?
0
Comment
Question by:amigan_99
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
6 Comments
 
LVL 79

Expert Comment

by:lrmoore
ID: 35185710
Have you tried changing the RNA Reversion Timeout on the Line Group?
Change it 1

0
 
LVL 20

Expert Comment

by:José Méndez
ID: 35192174
You have either a busy server/cpu, or network delays. CallManager completely under control of the IP Phone in SCCP mode, and is the responsible of sending the instruction to stop ringing. In the trace files you should see a StationInit message which is the phone communicating the server that it went off-hook to answer the call, and then a StationD message which is CallManager telling the phone to stop ringing. Both messages are timestamped and can be compared. Let me know if you need help with the traces.
0
 
LVL 1

Author Comment

by:amigan_99
ID: 35192959
Thanks Willy - so actually the server is over-spec'd and CPU is always cool - 3 - 4%.  And network delay is always sub 30ms and on average 16ms.  The insight on the Call Trace is awesome.  
0
Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

 
LVL 1

Author Comment

by:amigan_99
ID: 35193047
On a related note - do you know at a packet level how the broadcast is done?  Clearly it's not a broadcast in the networking sense but a series of unicasts.  I have 11 phones on that broadcast hunt group.  Could it be possible that say just the 1st phones in the group might see an issue as these unicasts have to be sent say one per second to each phone in the group?  e.g in 1st second phone 1 rings, 2nd  second phone 2 and so one?  So if phone 1 is picked up immediately but the other 10 phones haven't rung yet perhaps the ringing has to complete to all phones before ringing is stopped on phone 1 and voice commences??  
0
 
LVL 20

Accepted Solution

by:
José Méndez earned 2000 total points
ID: 35193327
No, phones should stop ringing when one of them picks up. As you say, it is not a broadcast. At an IP level, CallManager sends Skinny packets instructing to ring, targeted at each individual phone. This happens at same milisecond.
0
 
LVL 1

Author Closing Comment

by:amigan_99
ID: 35201851
I have not been able to re-create the issue the last couple of days.  But your answers give me much to go on.  Thanks.
0

Featured Post

Meet the Family that is Made for Collaboration

The TeamConnect Family product group as part of the Sennheiser for Business Portfolio comprising high-quality, technically well-conceived meeting solutions for business communication – designed for any meeting room and any meeting situation.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

The point of this post is to give you a copy/paste installation solution to setting up Asterisk 1.6 on Ubuntu 9.04 (or similar) server. # Setup the system apt-get install subversion apt-get install make apt-get install linux-source kernel-p…
There are no good configuration guides for HP-H3C router to LYNC on the web. :( Big statement, but we havent been able to find one yet. We did find the following document useful, but the information was not enough to use H3C router for use as a L…
Video by: ITPro.TV
In this episode Don builds upon the troubleshooting techniques by demonstrating how to properly monitor a vSphere deployment to detect problems before they occur. He begins the show using tools found within the vSphere suite as ends the show demonst…
In this video, Percona Solutions Engineer Barrett Chambers discusses some of the basic syntax differences between MySQL and MongoDB. To learn more check out our webinar on MongoDB administration for MySQL DBA: https://www.percona.com/resources/we…

618 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question