Paul, If you don't load the drivers for the T-1 hardware then you should be able to simply run a pass-through cable connecting to your second server's T-1 hardware. This will work on fail-over only if the primary powers down - which you can do using a UPS that is intelligent.
I use a set of scripts that mirror the primary to a secondary and keep the secondary up-to-date (within 24 hours of changes to the primary). http://www.trilug.org/~jonc/Failover_scripts/ I've been using the same set of scripts for about 5 years. They work fine for all my Master/Slave setups. I'm new to the list, but we've been using Asterisk for corporate use for over three years now. Jon Carnes FeatureTel On Sun, 2005-10-02 at 13:36, Paul wrote: > I am working on a similar problem and have some ideas for you. First I'm > using two servers with a T1 card in each. I have two companies currently in > the same location so the IP range can be in the same subnet without worrying > about SER or the like. > > In order for two companies to be on their own server yet be redundant to > each other I have devised a calling plan where both extensions are dialed to > reach the user (and both extensions have voicemail). As an example, > operator for company one is extension 200 as well as 200 on the backup > (second company) server and the extensions file dials both (using IAX to > link servers). So regardless of phone registration, the call can be > answered. > > Each server has the same configuration (a complete mirror copy) allowing the > dial out to use the PRI line that is active (there is only one - again IAX > link) > > Since I have not found any T1 cards that offer failover yet, the customer > must move the T1 cable. I was thinking about using the led power on the T1 > card (when polarity reverses to red) and wire it to an optoisolator, time > delay and old fashion relay to move the T1 to the second server if I cant > find an external T1 failover switch for a good price. > > I did speak to Sangoma Technologies about adding this feature to their card > but they have not done so yet. > > I have been playing with this for a month now and some of the problems I'm > facing are the refusal of SIP 7.5 on Cisco's 7960s to use the emergency > proxy when the primary is not responding. > > Some other minor problems are how to move the voice mail back to the correct > servers as well as the call reporting. I'm approaching this from two > avenues - > 1 - Internal cron jobs looking at each others servers to pull the data back > 2 - A separate Win XP station using a custom VS net program into the mysql > databases of each server as well as possibly being the trigger for the T1 > failover. > > I have not finished this yet, but if anyone has any ideas or has tried what > I am trying please let me know also. Also - interesting thought about the > linking of servers, does the IAX link cause a transcode on inbound and > outbound (extension to extension as well as extension to T1 BETWEEEN BOXES)? > Should I link them through SIP which is used by all phones? > > I'm just trying to use the mirror approach which is great for SMB's - my > market. > > Paul Norris > (631) 878-6438 > Silicon Valley Products > E. Moriches, NY > > > > > > > > >Has anyone real experiences with clustering for Asterisk ? > > >I already did some googling, and also look at wi-ki for solutions for High > >Avaiability, but I did not find enough info to aply a solution for my > >customer. > > >He wants a cluster, and if possible, to have their staff load balanced to > >two asterisk. When one of them crash or does not works correctly, the other > >one should make his job on a transparent work to the users... > > >So, I prefer an active-active cluster, but if that is impossible to cover, > >it is Ok to have an active-passive cluster. > > >It would be nice if also it could cover the following > > >- Customer has only on PRI (E1) line... Is there any way for both asterisk > >to use the same circuit ? > > >Also, for small installations (to 8 extensions) I would need a solution for > >the main operator phone to remain active if Asterisk goes down. I mind, if > >PBX does not work, the external line should at least get connected dirctly > >to the phone and allow them to receive calls until situation is solved. Any > >idea on this ? > > > _______________________________________________ > Asterisk-Biz mailing list > [email protected] > http://lists.digium.com/mailman/listinfo/asterisk-biz _______________________________________________ Asterisk-Biz mailing list [email protected] http://lists.digium.com/mailman/listinfo/asterisk-biz
