?
Solved

Cisc CUCM 7.1 Hunt Group Ringing Too Long

Posted on 2011-03-21
6
Medium Priority
?
1,506 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
VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

 
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

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Every year the snow affects people and businesses. According to the Federation of Small Businesses (FSB), in 2009, UK businesses lost an estimated £1.2bn (http://news.bbc.co.uk/1/hi/business/7864804.stm) because of bad weather. This article was c…
Implementing Avaya's One-X portal is pretty painless, until you want to deploy this to the Android and iPhone clients when these clients are outside of your network. The clients will also work within your local network. Here is our experience and so…
NetCrunch network monitor is a highly extensive platform for network monitoring and alert generation. In this video you'll see a live demo of NetCrunch with most notable features explained in a walk-through manner. You'll also get to know the philos…
In this video, Percona Director of Solution Engineering Jon Tobin discusses the function and features of Percona Server for MongoDB. How Percona can help Percona can help you determine if Percona Server for MongoDB is the right solution for …

801 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