Re: [asterisk-users] ISDN PRIs and taking a server down for maintenance - blocking issue
Hi Tim, Imagine the scenario where we had 10x Asterisk servers, with calls presenting sequentially starting from the first server, then server two, etc. If we took down the first server for maintenance with 'asterisk -rx stop gracefully' we then will block all incoming calls to all servers as our telco will simply relay the BUSY back to the caller. If there are a number of calls on the first server that continue for another 20 minutes, then all inbounds are blocked for that period of time. We are finding at present we have to look at the calls on the server and make a decision if we are busy to simply reboot the server and hence lose calls. Not ideal but then we don't end up blocking our inbounds. What I was hoping to do was find a way to cause the telco to present the call to the next ISDN30 and therefore would allow us to cleanly take down an Asterisk server for maintenance without causing this issue. In a sense to put the ISDN30 into alarm mode while still continuing the active calls. Do you know if this is at all possible, even if we considered patching zaptel to add this functionality or does the telco rely on the entire PRI being in alarm before it presents the call to the next ISDN30 ? This would allow us to run maintenance on our servers during busy periods without causing disruption, and would be an excellent feature. Many thanks, Andrew _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tim Nelson Sent: 13 February 2008 18:12 To: Asterisk Users Mailing List - Non-Commercial Discussion Cc: asterisk-users@lists.digium.com Subject: Re: [asterisk-users] ISDN PRIs and taking a server down for maintenance - blocking issue Even if * is shutdown, zaptel is still running and your ISDN channels are still technically up. Shutting down zaptel should close the channels and put those circuits into alarm mode. Tim Nelson Systems/Network Support Rockbochs Inc. (218)727-4332 - Original Message - From: Andrew Smith [EMAIL PROTECTED] To: asterisk-users@lists.digium.com Sent: Wednesday, February 13, 2008 12:03:51 PM (GMT-0600) America/Chicago Subject: [asterisk-users] ISDN PRIs and taking a server down for maintenance - blocking issue Hi there, I currently have multiple Asterisk servers using Sangoma A104d Quad ISDN E1s. Basically our telco is presenting calls in order of the ISDNs on our servers. SERVER1=1,2,3,4 SERVER2=5,6,7,8 We have redundancy in that if SERVER1 is shutdown then each ISDN PRI is in alarm and the calls will then presented to PRIs 5,6,7,8 on SERVER2. If I have to take SERVER1 offline for maintenance (asterisk -rx shutdown gracefully) any incoming calls receive a BUSY tone. What I would like to know is if there is anyway to get around this and not send a BUSY back to our callers and somehow allow our telco to present calls immediately to SERVER2. Anyone have any ideas or are we stuck with this behaviour until the calls drop to 0 and Asterisk shuts down ? Thanks, Andrew ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] ISDN PRIs and taking a server down for maintenance - blocking issue
Honestly.. this sounds like a telco issue.I understand what the other person is saying about the PRI still being technically up... BUT... if the channel is BUSY/BLOCKED/WHATEVER, the Telco should be forwarding the call to the next available channel, which they clearly are not doing. On Thu, Feb 14, 2008 at 8:29 AM, Andrew Smith [EMAIL PROTECTED] wrote: Hi Tim, Imagine the scenario where we had 10x Asterisk servers, with calls presenting sequentially starting from the first server, then server two, etc. If we took down the first server for maintenance with 'asterisk -rx stop gracefully' we then will block all incoming calls to all servers as our telco will simply relay the BUSY back to the caller. If there are a number of calls on the first server that continue for another 20 minutes, then all inbounds are blocked for that period of time. We are finding at present we have to look at the calls on the server and make a decision if we are busy to simply reboot the server and hence lose calls. Not ideal but then we don't end up blocking our inbounds. What I was hoping to do was find a way to cause the telco to present the call to the next ISDN30 and therefore would allow us to cleanly take down an Asterisk server for maintenance without causing this issue. In a sense to put the ISDN30 into alarm mode while still continuing the active calls. Do you know if this is at all possible, even if we considered patching zaptel to add this functionality or does the telco rely on the entire PRI being in alarm before it presents the call to the next ISDN30 ? This would allow us to run maintenance on our servers during busy periods without causing disruption, and would be an excellent feature. Many thanks, Andrew -- *From:* [EMAIL PROTECTED] [mailto: [EMAIL PROTECTED] *On Behalf Of *Tim Nelson *Sent:* 13 February 2008 18:12 *To:* Asterisk Users Mailing List - Non-Commercial Discussion *Cc:* asterisk-users@lists.digium.com *Subject:* Re: [asterisk-users] ISDN PRIs and taking a server down for maintenance - blocking issue Even if * is shutdown, zaptel is still running and your ISDN channels are still technically up. Shutting down zaptel should close the channels and put those circuits into alarm mode. Tim Nelson Systems/Network Support Rockbochs Inc. (218)727-4332 - Original Message - From: Andrew Smith [EMAIL PROTECTED] To: asterisk-users@lists.digium.com Sent: Wednesday, February 13, 2008 12:03:51 PM (GMT-0600) America/Chicago Subject: [asterisk-users] ISDN PRIs and taking a server down for maintenance - blocking issue Hi there, I currently have multiple Asterisk servers using Sangoma A104d Quad ISDN E1s. Basically our telco is presenting calls in order of the ISDNs on our servers. SERVER1=1,2,3,4 SERVER2=5,6,7,8 We have redundancy in that if SERVER1 is shutdown then each ISDN PRI is in alarm and the calls will then presented to PRIs 5,6,7,8 on SERVER2. If I have to take SERVER1 offline for maintenance (asterisk -rx shutdown gracefully) any incoming calls receive a BUSY tone. What I would like to know is if there is anyway to get around this and not send a BUSY back to our callers and somehow allow our telco to present calls immediately to SERVER2. Anyone have any ideas or are we stuck with this behaviour until the calls drop to 0 and Asterisk shuts down ? Thanks, Andrew ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
[asterisk-users] ISDN PRIs and taking a server down for maintenance - blocking issue
Hi there, I currently have multiple Asterisk servers using Sangoma A104d Quad ISDN E1s. Basically our telco is presenting calls in order of the ISDNs on our servers. SERVER1=1,2,3,4 SERVER2=5,6,7,8 We have redundancy in that if SERVER1 is shutdown then each ISDN PRI is in alarm and the calls will then presented to PRIs 5,6,7,8 on SERVER2. If I have to take SERVER1 offline for maintenance (asterisk -rx shutdown gracefully) any incoming calls receive a BUSY tone. What I would like to know is if there is anyway to get around this and not send a BUSY back to our callers and somehow allow our telco to present calls immediately to SERVER2. Anyone have any ideas or are we stuck with this behaviour until the calls drop to 0 and Asterisk shuts down ? Thanks, Andrew ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] ISDN PRIs and taking a server down for maintenance - blocking issue
Even if * is shutdown, zaptel is still running and your ISDN channels are still technically up. Shutting down zaptel should close the channels and put those circuits into alarm mode. Tim Nelson Systems/Network Support Rockbochs Inc. (218)727-4332 - Original Message - From: Andrew Smith [EMAIL PROTECTED] To: asterisk-users@lists.digium.com Sent: Wednesday, February 13, 2008 12:03:51 PM (GMT-0600) America/Chicago Subject: [asterisk-users] ISDN PRIs and taking a server down for maintenance - blocking issue Hi there, I currently have multiple Asterisk servers using Sangoma A104d Quad ISDN E1s. Basically our telco is presenting calls in order of the ISDNs on our servers. SERVER1=1,2,3,4 SERVER2=5,6,7,8 We have redundancy in that if SERVER1 is shutdown then each ISDN PRI is in alarm and the calls will then presented to PRIs 5,6,7,8 on SERVER2. If I have to take SERVER1 offline for maintenance (asterisk -rx shutdown gracefully) any incoming calls receive a BUSY tone. What I would like to know is if there is anyway to get around this and not send a BUSY back to our callers and somehow allow our telco to present calls immediately to SERVER2. Anyone have any ideas or are we stuck with this behaviour until the calls drop to 0 and Asterisk shuts down ? Thanks, Andrew ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
