I don't want to start the "How many calls can Asterisk handle?" discussion or "How many angels can stand on the point of a pin?" discussion either. But can anyone contribute some practical knowledge of systems that take in channel bank T1s or DS3s from "far away", and process the calls? I am looking for real world, been there, done that, or "check the 'Belchfire Systems GigaFiber 65536' system". Not to start the discussion, but "Is there a board that will take a DS3 (672 channels) and a system that will handle the calls, or is that a silly question?" Is there an IP box that would take the DS3 and then a system that would handle the calls? My guess would be yes because the actual call load would be far lower than 672 calls. Maybe 100-150 or so simultaneous. Each line/call would have to have absolute caller ID. In other words, PSTN call handling. Cary
On 07/11/2010 19:29, Cary Fitch wrote:> I don't want to start the "How many calls can Asterisk handle?" discussion > or "How many angels can stand on the point of a pin?" discussion either. > > But can anyone contribute some practical knowledge of systems that take in > channel bank T1s or DS3s from "far away", and process the calls? > > I am looking for real world, been there, done that, or "check the 'Belchfire > Systems GigaFiber 65536' system". > > Not to start the discussion, but "Is there a board that will take a DS3 (672 > channels) and a system that will handle the calls, or is that a silly > question?" > > Is there an IP box that would take the DS3 and then a system that would > handle the calls? My guess would be yes because the actual call load would > be far lower than 672 calls. Maybe 100-150 or so simultaneous. > > Each line/call would have to have absolute caller ID. In other words, PSTN > call handling. > > CaryHi, Did you saw this before: http://lists.digium.com/pipermail/asterisk-users/2008-April/209146.html ?
inline> I don't want to start the "How many calls can Asterisk handle?" discussion > or "How many angels can stand on the point of a pin?" discussion either.You just did> But can anyone contribute some practical knowledge of systems that take in > channel bank T1s or DS3s from "far away", and process the calls?Most of us are far too busy. These things are best learned the hardway.> I am looking for real world, been there, done that, or "check the 'Belchfire > Systems GigaFiber 65536' system".Its called Asterisk.> Not to start the discussion, but "Is there a board that will take a DS3 (672 > channels) and a system that will handle the calls, or is that a silly > question?"There are many. The primary problem it getting a provider to provide you with a DS3.> Is there an IP box that would take the DS3 and then a system that would > handle the calls? My guess would be yes because the actual call load would > be far lower than 672 calls. ?Maybe 100-150 or so simultaneous.There are a few solutions here and several expensive chunks of hardware. Do you want to put all your eggs in one basket?> Each line/call would have to have absolute caller ID. ?In other words, PSTN > call handling.That is between you and the provider. The technology exists on the wire.> CaryGringo Malvado...
-----Original Message----- From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Benoit Sent: Sunday, November 07, 2010 12:41 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [asterisk-users] Big practical systems Hi, Did you saw this before: http://lists.digium.com/pipermail/asterisk-users/2008-April/209146.html ? -- --- THANKS, YOUR ANSWER IS CONTRUCTIVE. No, I had not seen that. But it is helpful and gives me the idea that I should look at 4 systems and/or about 7-8 T1s per system maybe. That has "failure-spreading" and localization benefits also. As well as not trying to handle a whole LATA or more in a box. We still have a lot of practical matters to work out. Cary
Alternate question: Asterisk/PSTN oriented. If an Asterisk system were interfaced via a T1 to a local telco loop to a customer premises: (This is not a T1 to the customer premises, but a T1 to the telco who then demuxes it to copper to the customer premises. IE. In Telecom terms an EEL.) Will Asterisk handle that scenario with common drivers and cards? Who generates the customer audio "comfort sounds", ringing, busy, etc? Cary "I know a lot, but not everything."
I believe this looks like a standard channel bank. Asterisk generates all audio. Ring and hook status are sent out of band. Dial tones are in-band. Ringback, busy, congestion are in-band audio. I would think a standard T1 card would be fine. That said, I would verify this with the LEC. On Nov 7, 2010, at 1:22 PM, "Cary Fitch" <caryf at usawide.net> wrote:> Alternate question: > > Asterisk/PSTN oriented. > > If an Asterisk system were interfaced via a T1 to a local telco loop to a > customer premises: > > (This is not a T1 to the customer premises, but a T1 to the telco who then > demuxes it to copper to the customer premises. IE. In Telecom terms an > EEL.) > > Will Asterisk handle that scenario with common drivers and cards? > > Who generates the customer audio "comfort sounds", ringing, busy, etc? > > > > Cary > "I know a lot, but not everything." > > > -- > _____________________________________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > New to Asterisk? Join us for a live introductory webinar every Thurs: > http://www.asterisk.org/hello > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users
On Sun, Nov 7, 2010 at 1:29 PM, Cary Fitch <caryf at usawide.net> wrote:> But can anyone contribute some practical knowledge of systems that take in > channel bank T1s or DS3s from "far away", and process the calls?Yes. Adtran makes excellent gear. The MX 2800 is good for breaking a channelized DS3 into PRIs.> Not to start the discussion, but "Is there a board that will take a DS3 (672 > channels) and a system that will handle the calls, or is that a silly > question?"If by board, you mean PCI board for shoving in something with an intel cpu, not that I've ever heard. Digium sells 4x port PRI boards, and some competitor sells an 8x port PRI board, but I've never tried any boards not made by Digium. The only thing silly is the idea of trusting that many calls to PC hardware.> Is there an IP box that would take the DS3 and then a system that would > handle the calls?Yes, embedded hardware from a vendor you've heard of will do that. Cisco makes a 3845 which can terminate about 20 PRIs in one appliance.> My guess would be yes because the actual call load would > be far lower than 672 calls. ?Maybe 100-150 or so simultaneous.Well, then it's not really a DS3. If it can't do the whole thing without melting down, it shouldn't advertise itself as DS3. The Adtran gear works rock solid when pushed to the limit. If you're just talking 150 calls, you could do that with two 4x port cards in a single PC. I thought you were talking a lot bigger.> Each line/call would have to have absolute caller ID. ?In other words, PSTN > call handling.Ummm, there's no such thing as absolute caller ID. You wanna try that question again? callerID is not legally binding, is not used by billing, anybody can spoof it. The closest you can get is to have a LEC provide ANI. You don't need PRI to get that. You can get that via a quality voip provider, or yourself using your own termination gear to convert into voip.
-----Original Message----- From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Joel Maslak Sent: Sunday, November 07, 2010 2:56 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Cc: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [asterisk-users] Big practical systems I believe this looks like a standard channel bank. Asterisk generates all audio. Ring and hook status are sent out of band. Dial tones are in-band. Ringback, busy, congestion are in-band audio. I would think a standard T1 card would be fine. That said, I would verify this with the LEC. ================================== Does anyone know if AT&T EELs delivered to a CLEC would be PRI, or Robbed bit? Cary Fitch