Hello guys, I've been having a a recurring problem with people complaining about calls being dropped. I have 3 asterisk servers: Gateway: running Asterisk 1.2rc2 with TE410P connected to 4 T1s of the PSTN Server 1: running Asterisk 1.2rc2 with ztdummy using Gateway to access the PSTN (in/out) Server 2: running Asterisk 1.0.9 with ztdummy using Gateway to access the PSTN (in/out) I have agents connected to both Server 1 and Server 2. The problem is that every once in a while, agents complain that their calls dropped. Sometimes it's some agents that complaint, some other times, ALL agents complaint at the same time. When these complaints occur, the only thing I so is: 1) Issue a show channels on all three servers to see if there are any ongoing calls. I assume that if there are active calls, that not all calls dropped 2) Issue dmesg in Gateway to see if any of the T1s presented an alarm that could have dropped the calls In either case, I don't see any errors in dmesg indicating there were problems with the T1s and I always see active calls in all the servers. What can I do to further troubleshoot this? If I look at the CDR, how can I tell that a call was "abnormally" terminated? Are there any tools out there that would allow me to check the health status of the working system and not just the "availability" of the machines? I was looking at nagios but I don't know if it will do what I need to do. The other thing I could think of is that there may be a network problem in the building. The way everything is connected is all agents are connected to a series of unmanaged switches in the "call center floor", which are daisy chained together and then one is connected to the main switch with a single cable drop. The main switch is where the Asterisk servers are connected. I figured that if one of the switches in the call center area fails, it could drop all calls or if there is a problem with the cable drop from the main switch, that could also affect all agents. Any advise will be greatly appreciated. Thanks, Waldo
Mojo with Horan & Company, LLC
2005-Nov-15 11:32 UTC
[Asterisk-Users] Problem with call drops
Have you watched the output of zttest to make sure your interrupts are firing adequately? Waldo Rubinstein wrote:> Hello guys, > > I've been having a a recurring problem with people complaining about > calls being dropped. > > I have 3 asterisk servers: > > Gateway: running Asterisk 1.2rc2 with TE410P connected to 4 T1s of > the PSTN > Server 1: running Asterisk 1.2rc2 with ztdummy using Gateway to > access the PSTN (in/out) > Server 2: running Asterisk 1.0.9 with ztdummy using Gateway to access > the PSTN (in/out) > > I have agents connected to both Server 1 and Server 2. > > The problem is that every once in a while, agents complain that their > calls dropped. Sometimes it's some agents that complaint, some other > times, ALL agents complaint at the same time. > > When these complaints occur, the only thing I so is: > > 1) Issue a show channels on all three servers to see if there are any > ongoing calls. I assume that if there are active calls, that not all > calls dropped > 2) Issue dmesg in Gateway to see if any of the T1s presented an alarm > that could have dropped the calls > > In either case, I don't see any errors in dmesg indicating there were > problems with the T1s and I always see active calls in all the servers. > > What can I do to further troubleshoot this? If I look at the CDR, how > can I tell that a call was "abnormally" terminated? Are there any > tools out there that would allow me to check the health status of the > working system and not just the "availability" of the machines? I was > looking at nagios but I don't know if it will do what I need to do. > > The other thing I could think of is that there may be a network > problem in the building. The way everything is connected is all > agents are connected to a series of unmanaged switches in the "call > center floor", which are daisy chained together and then one is > connected to the main switch with a single cable drop. The main > switch is where the Asterisk servers are connected. I figured that if > one of the switches in the call center area fails, it could drop all > calls or if there is a problem with the cable drop from the main > switch, that could also affect all agents. > > Any advise will be greatly appreciated. > > Thanks, > Waldo > _______________________________________________ > --Bandwidth and Colocation sponsored by Easynews.com -- > > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users >-- Mojo <mojo@horanappraisals.com> Office Manger, Horan & Company, LLC (907) 747-6666 x112
What kind of switches? I would suggest go gigabit between your servers, their switch, and the call center floor. And, use managed switches if you are over 20 total stations. Could be someone's got a p2p and it is killing you. Maybe unlikely, but quite possible. Use some good 3com switches too, and totally avoid hub and daisy chaining. Or get a managed switch with expansion switches if you are running a large number of ports. Either way, a single cable drop is a very bad idea. You get a snagged cable or something and you can be out of business because of a stupid cable. Regards, Greg -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Waldo Rubinstein Sent: Tuesday, November 15, 2005 1:01 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: [Asterisk-Users] Problem with call drops Hello guys, I've been having a a recurring problem with people complaining about calls being dropped. I have 3 asterisk servers: Gateway: running Asterisk 1.2rc2 with TE410P connected to 4 T1s of the PSTN Server 1: running Asterisk 1.2rc2 with ztdummy using Gateway to access the PSTN (in/out) Server 2: running Asterisk 1.0.9 with ztdummy using Gateway to access the PSTN (in/out) I have agents connected to both Server 1 and Server 2. The problem is that every once in a while, agents complain that their calls dropped. Sometimes it's some agents that complaint, some other times, ALL agents complaint at the same time. When these complaints occur, the only thing I so is: 1) Issue a show channels on all three servers to see if there are any ongoing calls. I assume that if there are active calls, that not all calls dropped 2) Issue dmesg in Gateway to see if any of the T1s presented an alarm that could have dropped the calls In either case, I don't see any errors in dmesg indicating there were problems with the T1s and I always see active calls in all the servers. What can I do to further troubleshoot this? If I look at the CDR, how can I tell that a call was "abnormally" terminated? Are there any tools out there that would allow me to check the health status of the working system and not just the "availability" of the machines? I was looking at nagios but I don't know if it will do what I need to do. The other thing I could think of is that there may be a network problem in the building. The way everything is connected is all agents are connected to a series of unmanaged switches in the "call center floor", which are daisy chained together and then one is connected to the main switch with a single cable drop. The main switch is where the Asterisk servers are connected. I figured that if one of the switches in the call center area fails, it could drop all calls or if there is a problem with the cable drop from the main switch, that could also affect all agents. Any advise will be greatly appreciated. Thanks, Waldo _______________________________________________ --Bandwidth and Colocation sponsored by Easynews.com -- Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users