Re: [Asterisk-Users] Digium TDM400P vs Sangoma A200 for 2 x FXO
Mike Clark [EMAIL PROTECTED] wrote: If you aren't going for the echo cancellation, then I think either card will do fine. We are now deploying only the A200 because we never know if echo will be an issue or if it can be tuned away Thanks, Mike. That's a good point in favour of the A200 - it's cheap to add the hardware echo canceller if it's needed. Nick. -- Nick Chalk . once a Radio Designer Confidence is failing to understand the problem. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Digium TDM400P vs Sangoma A200 for 2 x FXO
John Novack [EMAIL PROTECTED] wrote: Though many will probably disagree, you will be LOTS better off with the Sangoma A200 It is MUCH more forgiving regarding Motherboards and the PCI 2.2 requirement, That's one of my concerns. I'm working with refurbished hardware, so don't have much freedom of choice in motherboards. I'm planning on using a fairly good Intel dual- socket-370 server board, but I can't afford to make the wrong choice. even though the software installation instructions leave much to be desired for the inexperienced, Is that inexperienced in telephony, or inex- perienced in Linux? I have zero telephony experience, but plenty with Linux. :-) Nick. -- Nick Chalk . once a Radio Designer Confidence is failing to understand the problem. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Digium TDM400P vs Sangoma A200 for 2 x FXO
Chris Bagnall [EMAIL PROTECTED] wrote: The site in Northampton with 3 FXO has been an absolute nightmare over the last 9 months the system's been in place. Once asterisk 1.2 was deployed, things improved remarkably. Do you think that was improved code in v1.2, or the result of your calibration? I took the time on-site to properly configure the txgain and rxgain using a milliwatt tone coming from one of our other servers in a datacentre Is that procedure documented somewhere? I've found the asterisk config for generating the tone, but what are you measuring on the test system to set the correct gains? One thing worth checking with BT - if you can find someone who can give you an accurate answer :-) - is whether the Featureline will give you disconnect supervision. If it will, so much the better, as * 1.2 seems to have usable support for it. Thanks, I'll look into that. It's still not as good as the building next door where they have 2 ISDN BRIs Yes, that might make life easier. I don't think I can make the argument for converting to ISDN yet, though. :-/ Thanks, Chris! Nick. -- Nick Chalk . once a Radio Designer Confidence is failing to understand the problem. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Digium TDM400P vs Sangoma A200 for 2 x FXO
Nick Chalk wrote: Evening all. I'm looking at building an Asterisk system for one of the projects of the Charity where I'm the SysAdmin. The project has two analogue phone lines - BT Featureline Compact, we're in the UK - that I'd like Asterisk to handle. My current quandary is which FXO interface to use. I've been looking at the Digium TDM400P and Sangoma A200, which are similar prices for two FXO lines. Can anyone comment on the relative merits of those two devices? Are there any other options in the same price range? As we're a small Charity, price is a major consideration. I don't think we can afford the A200's hardware echo-canceller, for instance. Thanks for your help. Nick. Nick: If you aren't going for the echo cancellation, then I think either card will do fine.We have over twenty five systems deployed in rural eastern North Carolina locations with six analog lines each and the majority work fine with TDM400s, though we have had to replace several with Sangoma A200 with echo cancellation to eliminate echo. We are now deploying only the A200 because we never know if echo will be an issue or if it can be tuned away and it is just easier for support to not have that worry. Mike Clark ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Digium TDM400P vs Sangoma A200 for 2 x FXO
Though many will probably disagree, you will be LOTS better off with the Sangoma A200 It is MUCH more forgiving regarding Motherboards and the PCI 2.2 requirement, even though the software installation instructions leave much to be desired for the inexperienced, it does work, and Sangoma fixed a problem I discovered with their FXS module software. My first experience with Digium and the TDM400 was, when it couldn't be seen in a motherboard that said it was PCI 2.2, Digium's response was try another motherboard John Novack Nick Chalk wrote: Evening all. I'm looking at building an Asterisk system for one of the projects of the Charity where I'm the SysAdmin. The project has two analogue phone lines - BT Featureline Compact, we're in the UK - that I'd like Asterisk to handle. My current quandary is which FXO interface to use. I've been looking at the Digium TDM400P and Sangoma A200, which are similar prices for two FXO lines. Can anyone comment on the relative merits of those two devices? Are there any other options in the same price range? As we're a small Charity, price is a major consideration. I don't think we can afford the A200's hardware echo-canceller, for instance. Thanks for your help. Nick. ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
RE: [Asterisk-Users] Digium TDM400P vs Sangoma A200 for 2 x FXO
I've no experience with the A200, so I can't really pass judgement on it. We have 2 sites with TDM400P cards currently deployed (one with 3 FXO, the other with 1 FXO and 3 FXS). The site in Northampton with 3 FXO has been an absolute nightmare over the last 9 months the system's been in place. Initially we had big problems with echo that no amount of tweaking of the echo parameters would fix. Once asterisk 1.2 was deployed, things improved remarkably. I took the time on-site to properly configure the txgain and rxgain using a milliwatt tone coming from one of our other servers in a datacentre (rather than relying on using ztmonitor -v whilst the client was making/receiving calls - you can't guarantee whether the party they're talking to has *their* gains properly configured, which means you end up with completely different results on every call). Once I'd got the gains properly configured, fairly standard echo cancellation settings of on and echotraining=800 seem to work relatively well. One thing worth checking with BT - if you can find someone who can give you an accurate answer - is whether the Featureline will give you disconnect supervision. If it will, so much the better, as * 1.2 seems to have usable support for it. If it works reliably, you can increase the number of busy tones to detect before a channel is killed (this will massively reduce incidences of false hangups). It's still not as good as the building next door where they have 2 ISDN BRIs, but it works, and I've not had any complaints for the last month since their box was upgraded to 1.2. Hope that helps. (shameless plug - I have a spare TDM400 card here if you're looking to acquire one at a reduced price - discuss off-list if interested) Regards, Chris -- C.M. Bagnall, Director, Minotaur I.T. Limited This email is made from 100% recycled electrons ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
