Has anyone tried RedFone?? It is supposed to offload a lot of that bus overhead to the external unit doing TDMoE.
====================== Jeronimo Romero EUS Networks Email: [EMAIL PROTECTED] Cell: 917-332-7238 Office: 212-624-5943 Web: www.euscorp.com ====================== > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:asterisk-users- > [EMAIL PROTECTED] On Behalf Of John covici > Sent: Thursday, September 28, 2006 12:14 PM > To: Asterisk Users Mailing List - Non-Commercial Discussion > Subject: RE: [asterisk-users] WAS: 64 analog phones NOW: Selection > criteria and recipie for a good Asterisk install [long] > > OK, pardon my ignorance -- but what can you tune on such a system? > How does Linux handle separate buses? > > Thanks. > > on Thursday 09/28/2006 Colin Anderson([EMAIL PROTECTED]) > wrote > > >I concur with your approach, but "Tier 1" means as little here as it > > >does when evaluating Internet backbone carriers. could you expand on > > >what evaluation criteria you use? I'm going to be pre-speccing some > > >stuff myself this month... > > > > Sorry I should have been more clear. A good Asterisk install needs a > > holistic approach to use a hippy dippy phrase. A Tier 1 server, which > is a > > midrange to high end name brand server from the Big 3 (Dell, HP/Compaq, > IBM, > > am I missing someone?) is usually highly optimized for bus bandwidth > > although that design was intended for a different use - usually massive > disk > > I/O. As well, a Tier 1 server will have two seperate, independent PCI > buses > > and this to me is a critical feature - it allows you to completely > separate > > your TDM traffic from network, disk I/O etc. On my big production > Netfinity, > > I took great care to ensure the Digium cards were all on their lonesome > on a > > single bus, and everything else on the other bus. This is how I can run > two > > TE110's in a single box with no problems. zttest does not give me 100% > all > > the time, but on the other hand it *never* drops below 99.9987%, even > under > > load. I selected this Netfinity because of the obvious care put into > it's > > design, but the specs are unimpressive: quad Xeon 700's. CPU is over > rated > > for Asterisk, IMO unless you are doing tons of transcoding and if you > are > > doing that, then your design is flawed. > > > > Anyway, the holistic approach (to go on a small rant for the newbie > lurkers) > > be summed up as follows: > > > > 1. Good box, see above > > 2. Good LAN - this is so critical and so often overlooked in the day > and age > > of guys crimping their own cables and running $150 switches. You can't > do > > that, and if you do, you do so at your own peril. Managed swiches, > > professional cable installation. This is not a problem for me since I > *am* a > > professional cable installer but I have actually witnessed people > making > > patch cables with a flat blade screwdriver and a hammer! > > 3. Tuning of the LAN - VLAN's are good. QoS packets are good. Switches > that > > honor the QoS packets are good. > > 4. Handset selection - this is another biggie. I've selected Snom > 360's, and > > yes they have warts, but they are feature rich for the price and Snom > is > > really good about revising firmware. When you select handsets, GET YOUR > > USERS INVOLVED. > > 5. Tuning of Asterisk box itself - this cannot be under emphasized. > This is > > a very important step and tuning methodologies vary according to > distro, > > skill of the admin, and particular circumstances. I've learned *way* > more > > than I ever wanted to about processor affinity sinc I started using > > Asterisk. > > 6. Termination of PSTN. Basically I would never do an Asterisk install > where > > I was forced to do something stupid like aggregate a dozen Centrex > lines or > > some mickey mouse deal with FXO ATA's or whatever except for a hobby or > > prototype install. PRI, BRI, IAX or SIP, don't mess around with > anything > > else. > > 7. Relationship with provider. What is their SLA? Is it the incumbent > or the > > clec? An incumbent will be more expensive and more difficult to deal > with > > but they will tend to be more reliable. A clec will be cheaper and they > will > > be way more accomodating but you will most likely not get five 9's from > > them. A VoIP provider should never be trusted, period. You will not get > five > > nines from them, ever. Plan failover situations accordingly. > > 8. Plan plan plan plan. A good install of ANYTHING is 80% planning 20% > doing > > it. What is your plan when your primary PSTN provider fails? What is > your > > plan if your Asterisk box goes pear shaped? My dialplan can survive > either > > PSTN, WAN or LAN failure (albeit with reduced functionality). I also > keep a > > cold spare, an identically configured box that I can literally throw > into > > the rack, turn it on, plug in the PRI's and no problem. > > 9. Internet bandwidth and latency. I am fortunate enough to have a > great IP > > provider. Ask for demos - most guys will install a 90 day trial or > something > > like that. Do not believe the brochure, get the product installed and > put it > > under load. > > 10. Traffic prioritization at the IP demarc - total no brainer. > > 11. Constant, constant user feedback and remediation. If you are not > talking > > to your users, your install will ultimately fail even if you have the > best > > of everything. Underpromise and overdeliver. Never loose sight of the > basics > > - they have to pick up the phone, and it has to work. Always. > > _______________________________________________ > > --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 > > -- > Your life is like a penny. You're going to lose it. The question is: > How do > you spend it? > > John Covici > [EMAIL PROTECTED] > _______________________________________________ > --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 _______________________________________________ --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
