Barton Fisher
2005-Jun-10 18:26 UTC
[Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?
I'm looking to expand my bandwidth for my Asterisk PBX. Why should I choose a T1 over DSL for my asterisk server? I found someone offering T1's for $290 a month + Loops or 3 Meg for $561 a month + Loops. Is this a good deal? Thanks Bart -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20050610/df7b50be/attachment.htm
Michael Welter
2005-Jun-10 18:38 UTC
[Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?
Barton Fisher wrote:> I'm looking to expand my bandwidth for my Asterisk PBX. > > Why should I choose a T1 over DSL for my asterisk server? > > I found someone offering T1's for $290 a month + Loops or 3 Meg for $561 > a month + Loops. Is this a good deal? > > Thanks > > Bart > > > ------------------------------------------------------------------------ > > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-usersWhere are you located? What CLEC gives you a T-1 for $290? I have a 1.5Mbps DSL at home--it works find for VoIP until everyone else get on (after supper) when the usable bandwidth goes way down.
At 08:26 PM 6/10/2005, you wrote:>I'm looking to expand my bandwidth for my Asterisk PBX. > >Why should I choose a T1 over DSL for my asterisk server?Read the SLA (Service Level Agreement) on each. DSL usually doesn't have one. You are buying an oversold connection which might give you the speed you are buying. A full T1 should be 1.5Mbps full duplex.> >I found someone offering T1's for $290 a month + Loops or 3 Meg for $561 a >month + Loops. Is this a good deal?Again, it depends on the company. From a Tier 1 provider with a good SLA it is a good deal. From an over-subscribed CLEC, probably not. Tom> >Thanks > >Bart
Rick Baranowski
2005-Jun-10 20:09 UTC
[Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?
SLA! T-1 usually has a Service Level Agreement so if your T-1 goes down they have to fix it ASAP. DSL usually doesn't have this. We had this is come up before. We had 1.5 VDSL from Qwest (which has worked fine for VOIP for us) but we had it go out and it was done for a day. Tried to explain to them that we use VOIP at the office and our phones where down too, they didn't seem to care. When we had trouble with a T-1 from Qwest they where out in 30 min to fix it. The prices are pretty good but it just depend how far you are from the CO. Do they include the CSU/DSU? Rick _____ From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Barton Fisher Sent: Friday, June 10, 2005 6:27 PM To: Asterisk-Users@lists.digium.com Subject: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? I'm looking to expand my bandwidth for my Asterisk PBX. Why should I choose a T1 over DSL for my asterisk server? I found someone offering T1's for $290 a month + Loops or 3 Meg for $561 a month + Loops. Is this a good deal? Thanks Bart -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20050610/c85c2316/attachment.htm
Peter A. Solomon
2005-Jun-10 20:39 UTC
[Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?
-----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Barton Fisher Sent: Friday, June 10, 2005 9:27 PM To: Asterisk-Users@lists.digium.com Subject: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? I'm looking to expand my bandwidth for my Asterisk PBX. Why should I choose a T1 over DSL for my asterisk server? I found someone offering T1's for $290 a month + Loops or 3 Meg for $561 a month + Loops. Is this a good deal? Thanks Bart ********************** If your looking at wanting to use QOS or Multiprotocol Label Switching on the same line, then a T is the way to go. You don't mention the equipments though so it's hard to answer your question. How many calls, Data & VOIP, Protocol? Tier One ISP? You get what you pay for, it all depends up what you need.
Wiley Siler
2005-Jun-13 08:43 UTC
[Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?
Speakeasy SDSL Is 1.5 Megs, is business class (so you get an SLA) and only costs around $100 per month. W -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Robert Goodyear Sent: Friday, June 10, 2005 7:02 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? On Jun 10, 2005, at 6:38 PM, Michael Welter wrote:> Barton Fisher wrote: >> I'm looking to expand my bandwidth for my Asterisk PBX. Why should I>> choose a T1 over DSL for my asterisk server? I found someone >> offering T1's for $290 a month + Loops or 3 Meg for $561 a month + >> Loops. Is this a good deal? >> Thanks >> Bart >> --------------------------------------------------------------------- >> - >> -- >> _______________________________________________ >> Asterisk-Users mailing list >> Asterisk-Users@lists.digium.com >> http://lists.digium.com/mailman/listinfo/asterisk-users >> To UNSUBSCRIBE or update options visit: >> http://lists.digium.com/mailman/listinfo/asterisk-users > Where are you located? What CLEC gives you a T-1 for $290? >FWIW I provisioned a PRI and a DS-1 for $300 each. Don't know if I'm getting a break for having a voice and a data circuit broken out from one fiber drop, but that's what I'm paying here in Orange County. Also, I had a business cable modem before, which was *allegedly* not shared for business customers (suspicious) and the throughput was a roller coaster, as was the latency. The DS-1 cleared all that up. /rg Robert Goodyear Brand Up LLC http://www.brand-up.com _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Damon Estep
2005-Jun-13 16:54 UTC
[Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?
You are aware that DSL (even SDSL) is half duplex and a T1 is full duplex, right? 1.5m sdsl can only do 768 sustained duplex, or 1.5 out 0 in, or 0 out 1.5 in. a T1 will do 1.5 in and 1.5 out sustained. This is due to a separate transmit and receive path on a t1 and a shared path on sdsl. The s in sdsl means symmetrical, not duplex, that is that the signaling rate is the same in either direction, but still half duplex. For VoIP a t1 is worth double what a 1.5 sdsl is because of the duplex nature of the traffic, unlike most internet that is download-centric. -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Wiley Siler Sent: Monday, June 13, 2005 9:43 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: RE: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? Speakeasy SDSL Is 1.5 Megs, is business class (so you get an SLA) and only costs around $100 per month. W -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Robert Goodyear Sent: Friday, June 10, 2005 7:02 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? On Jun 10, 2005, at 6:38 PM, Michael Welter wrote:> Barton Fisher wrote: >> I'm looking to expand my bandwidth for my Asterisk PBX. Why should I>> choose a T1 over DSL for my asterisk server? I found someone >> offering T1's for $290 a month + Loops or 3 Meg for $561 a month + >> Loops. Is this a good deal? >> Thanks >> Bart >> --------------------------------------------------------------------- >> - >> -- >> _______________________________________________ >> Asterisk-Users mailing list >> Asterisk-Users@lists.digium.com >> http://lists.digium.com/mailman/listinfo/asterisk-users >> To UNSUBSCRIBE or update options visit: >> http://lists.digium.com/mailman/listinfo/asterisk-users > Where are you located? What CLEC gives you a T-1 for $290? >FWIW I provisioned a PRI and a DS-1 for $300 each. Don't know if I'm getting a break for having a voice and a data circuit broken out from one fiber drop, but that's what I'm paying here in Orange County. Also, I had a business cable modem before, which was *allegedly* not shared for business customers (suspicious) and the throughput was a roller coaster, as was the latency. The DS-1 cleared all that up. /rg Robert Goodyear Brand Up LLC http://www.brand-up.com _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Wiley Siler
2005-Jun-13 17:13 UTC
[Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?
Are you sure? Everything I have seen says SDSL = Full Duplex. That being achieved by dropping the pair that provided voice and using it for signalling. "Where ADSL utilizes unoccupied frequencies and averts conflict with analog voice frequencies, SDSL takes over the whole line. SDSL eliminates analog voice capabilities in favor of full-duplex data transmission. No splitter, no analog voice-nothing but data. As a decent alternative to T1, SDSL has gotten a fair amount of attention from Competitive Local Exchange Carriers." Excerpt from.... http://www.isp-select.com/SDSL.htm Cheers, Wiley -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Damon Estep Sent: Monday, June 13, 2005 4:55 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: RE: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? You are aware that DSL (even SDSL) is half duplex and a T1 is full duplex, right? 1.5m sdsl can only do 768 sustained duplex, or 1.5 out 0 in, or 0 out 1.5 in. a T1 will do 1.5 in and 1.5 out sustained. This is due to a separate transmit and receive path on a t1 and a shared path on sdsl. The s in sdsl means symmetrical, not duplex, that is that the signaling rate is the same in either direction, but still half duplex. For VoIP a t1 is worth double what a 1.5 sdsl is because of the duplex nature of the traffic, unlike most internet that is download-centric. -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Wiley Siler Sent: Monday, June 13, 2005 9:43 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: RE: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? Speakeasy SDSL Is 1.5 Megs, is business class (so you get an SLA) and only costs around $100 per month. W -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Robert Goodyear Sent: Friday, June 10, 2005 7:02 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? On Jun 10, 2005, at 6:38 PM, Michael Welter wrote:> Barton Fisher wrote: >> I'm looking to expand my bandwidth for my Asterisk PBX. Why should I>> choose a T1 over DSL for my asterisk server? I found someone >> offering T1's for $290 a month + Loops or 3 Meg for $561 a month + >> Loops. Is this a good deal? >> Thanks >> Bart >> --------------------------------------------------------------------- >> - >> -- >> _______________________________________________ >> Asterisk-Users mailing list >> Asterisk-Users@lists.digium.com >> http://lists.digium.com/mailman/listinfo/asterisk-users >> To UNSUBSCRIBE or update options visit: >> http://lists.digium.com/mailman/listinfo/asterisk-users > Where are you located? What CLEC gives you a T-1 for $290? >FWIW I provisioned a PRI and a DS-1 for $300 each. Don't know if I'm getting a break for having a voice and a data circuit broken out from one fiber drop, but that's what I'm paying here in Orange County. Also, I had a business cable modem before, which was *allegedly* not shared for business customers (suspicious) and the throughput was a roller coaster, as was the latency. The DS-1 cleared all that up. /rg Robert Goodyear Brand Up LLC http://www.brand-up.com _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Wiley Siler
2005-Jun-13 17:37 UTC
[Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?
BTW - The Speakeasy SDSL connection I originally posted about is delivered via Covad. The SLA (some of it at least) Average Network Delivery and Delay2 - Further proof that Covad has confidence in the performance of our network. Delivery - 99.9% successful delivery of all data packets sent from your location over the Covad network, or you will be eligible for a credit of up to 10% of your monthly service fee. Delay - 110 millisecond average for the round trip of a message sent from your location to a test point on the Covad network, or you will be eligible for a credit of up to 10% of your monthly service fee. SLA can be found here... http://www.covad.com/products/access/telespeed/details.shtml#sla Being only 4000 feet from the Central Office, this works very well for me. I have not been able to figure if QoS is possible yet. Haven't figured out the examples from the Wiki for QoS via HFB (I think) and no answer from techs yet. Thanks, Wiley -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Nir Simionovich Sent: Monday, June 13, 2005 6:22 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? Marcelo Pacheco wrote:>SDSL has symmetrical speeds and full duplex communications. >Of the widely deployed lan/wan technologies, the only one I know of >that is half-duplex is 802.11{b,g}. >802.11b/g are standards used in wireless (Wi-Fi) connections, there is no relation to the symetrics or asymetrics of the actual physical line.>The only technical difference between a T1 and SDSL is how it's >physically delivered to the customer, what usually happens is that a T1>is not oversold, while an SDSL is oversold anywhere from 8:1 to 3:1. > >That is correct in the genereal idea, however, as xDSL technologies are switched technologies, unlike cable (DOCSIS) technologies, the fact that you are overloaded 8:1 or 3:1 will not really matter. As long as your equipment supports QoS correctly, you shouldn't have a problem.>ADSL is full duplex as well, if you don't know how to do QOS then it >will feel like it's half duplex, but it's not. I have 1000/320 ADSL >that I can use full bandwidth both ways. > >ADSL appears to be half-duplex only due to the fact that most ISP's "misconfigure" the modems and routers. As a rule of thumb, the modem/router can be re-configured to utilize both channels to the fullest, but again, this must rely on the fact that your ISP's equipment supports QoS at the switch level correctly. Nir S>Marcelo Pacheco > >Em Seg 13 Jun 2005 20:54, Damon Estep escreveu: > > >>You are aware that DSL (even SDSL) is half duplex and a T1 is full >>duplex, right? >> >>1.5m sdsl can only do 768 sustained duplex, or 1.5 out 0 in, or 0 out >>1.5 in. a T1 will do 1.5 in and 1.5 out sustained. >> >>This is due to a separate transmit and receive path on a t1 and a >>shared path on sdsl. >> >>The s in sdsl means symmetrical, not duplex, that is that the >>signaling rate is the same in either direction, but still half duplex. >> >>For VoIP a t1 is worth double what a 1.5 sdsl is because of the duplex>>nature of the traffic, unlike most internet that is download-centric. >> >>-----Original Message----- >>From: asterisk-users-bounces@lists.digium.com >>[mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Wiley >>Siler >>Sent: Monday, June 13, 2005 9:43 AM >>To: Asterisk Users Mailing List - Non-Commercial Discussion >>Subject: RE: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? >> >>Speakeasy SDSL Is 1.5 Megs, is business class (so you get an SLA) and >>only costs around $100 per month. >> >>W >> >>-----Original Message----- >>From: asterisk-users-bounces@lists.digium.com >>[mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Robert >>Goodyear >>Sent: Friday, June 10, 2005 7:02 PM >>To: Asterisk Users Mailing List - Non-Commercial Discussion >>Subject: Re: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? >> >>On Jun 10, 2005, at 6:38 PM, Michael Welter wrote: >> >> >>>Barton Fisher wrote: >>> >>> >>>>I'm looking to expand my bandwidth for my Asterisk PBX. Why should >>>>I >>>> >>>>choose a T1 over DSL for my asterisk server? I found someone >>>>offering T1's for $290 a month + Loops or 3 Meg for $561 a month + >>>>Loops. Is this a good deal? >>>> Thanks >>>> Bart >>>>-------------------------------------------------------------------- >>>>- >>>>- >>>>-- >>>>_______________________________________________ >>>>Asterisk-Users mailing list >>>>Asterisk-Users@lists.digium.com >>>>http://lists.digium.com/mailman/listinfo/asterisk-users >>>>To UNSUBSCRIBE or update options visit: >>>> http://lists.digium.com/mailman/listinfo/asterisk-users >>>> >>>> >>>Where are you located? What CLEC gives you a T-1 for $290? >>> >>> >>FWIW I provisioned a PRI and a DS-1 for $300 each. Don't know if I'm >>getting a break for having a voice and a data circuit broken out from >>one fiber drop, but that's what I'm paying here in Orange County. >>Also, I had a business cable modem before, which was *allegedly* not >>shared for business customers (suspicious) and the throughput was a >>roller coaster, as was the latency. The DS-1 cleared all that up. >> >>/rg >> >>Robert Goodyear >>Brand Up LLC >>http://www.brand-up.com >> >>_______________________________________________ >>Asterisk-Users mailing list >>Asterisk-Users@lists.digium.com >>http://lists.digium.com/mailman/listinfo/asterisk-users >>To UNSUBSCRIBE or update options visit: >> http://lists.digium.com/mailman/listinfo/asterisk-users >>_______________________________________________ >>Asterisk-Users mailing list >>Asterisk-Users@lists.digium.com >>http://lists.digium.com/mailman/listinfo/asterisk-users >>To UNSUBSCRIBE or update options visit: >> http://lists.digium.com/mailman/listinfo/asterisk-users >>_______________________________________________ >>Asterisk-Users mailing list >>Asterisk-Users@lists.digium.com >>http://lists.digium.com/mailman/listinfo/asterisk-users >>To UNSUBSCRIBE or update options visit: >> http://lists.digium.com/mailman/listinfo/asterisk-users >> >> >_______________________________________________ >Asterisk-Users mailing list >Asterisk-Users@lists.digium.com >http://lists.digium.com/mailman/listinfo/asterisk-users >To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > >_______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Damon Estep
2005-Jun-13 19:08 UTC
[Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?
OK, You guys have me second guessing my training and experience in this area, so; 1. If I am wrong I apologize to the group. 2. I have been trying for a few minutes to find confirmation either way.>From what I know about the modulation techniques used by DSL (DMT, CAP,QAM) it is impossible for the transceiver in the device to transmit and receive at the same time (unless there is discreet "channels" for each path and a very good transceiver). Does anyone have any definitive technical resources confirming that any form of xDSL technology can transmit and receive at precisely the same time (not interleaved). Can anyone provide a more logical explanation of why the outbound latency on every DSL modem tested increases with inbound traffic? Even at rates well below the maximum data rate, Not the case on a T1. My explanation is that the additional latency is due to packet scheduling and queuing mechanisms required by the technology. Maybe I will learn something this evening. Damon -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Wiley Siler Sent: Monday, June 13, 2005 6:14 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: RE: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? Are you sure? Everything I have seen says SDSL = Full Duplex. That being achieved by dropping the pair that provided voice and using it for signalling. "Where ADSL utilizes unoccupied frequencies and averts conflict with analog voice frequencies, SDSL takes over the whole line. SDSL eliminates analog voice capabilities in favor of full-duplex data transmission. No splitter, no analog voice-nothing but data. As a decent alternative to T1, SDSL has gotten a fair amount of attention from Competitive Local Exchange Carriers." Excerpt from.... http://www.isp-select.com/SDSL.htm Cheers, Wiley -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Damon Estep Sent: Monday, June 13, 2005 4:55 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: RE: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? You are aware that DSL (even SDSL) is half duplex and a T1 is full duplex, right? 1.5m sdsl can only do 768 sustained duplex, or 1.5 out 0 in, or 0 out 1.5 in. a T1 will do 1.5 in and 1.5 out sustained. This is due to a separate transmit and receive path on a t1 and a shared path on sdsl. The s in sdsl means symmetrical, not duplex, that is that the signaling rate is the same in either direction, but still half duplex. For VoIP a t1 is worth double what a 1.5 sdsl is because of the duplex nature of the traffic, unlike most internet that is download-centric. -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Wiley Siler Sent: Monday, June 13, 2005 9:43 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: RE: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? Speakeasy SDSL Is 1.5 Megs, is business class (so you get an SLA) and only costs around $100 per month. W -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Robert Goodyear Sent: Friday, June 10, 2005 7:02 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? On Jun 10, 2005, at 6:38 PM, Michael Welter wrote:> Barton Fisher wrote: >> I'm looking to expand my bandwidth for my Asterisk PBX. Why should I>> choose a T1 over DSL for my asterisk server? I found someone >> offering T1's for $290 a month + Loops or 3 Meg for $561 a month + >> Loops. Is this a good deal? >> Thanks >> Bart >> --------------------------------------------------------------------- >> - >> -- >> _______________________________________________ >> Asterisk-Users mailing list >> Asterisk-Users@lists.digium.com >> http://lists.digium.com/mailman/listinfo/asterisk-users >> To UNSUBSCRIBE or update options visit: >> http://lists.digium.com/mailman/listinfo/asterisk-users > Where are you located? What CLEC gives you a T-1 for $290? >FWIW I provisioned a PRI and a DS-1 for $300 each. Don't know if I'm getting a break for having a voice and a data circuit broken out from one fiber drop, but that's what I'm paying here in Orange County. Also, I had a business cable modem before, which was *allegedly* not shared for business customers (suspicious) and the throughput was a roller coaster, as was the latency. The DS-1 cleared all that up. /rg Robert Goodyear Brand Up LLC http://www.brand-up.com _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Damon Estep
2005-Jun-13 19:25 UTC
[Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?
Notice below that the only forms of DSL touted by anyone as replacements for full duplex 1.544mbps T1 lines is HDSL. Telcos regularly use HDSL as replacements for traditional DS1 service wher the line distances are VERY short, in most cases the HDSL circuit requires 2 pair, in some very short line distance installs it can be doen with one pair. HDSL interfaces cost 5 times what typical DSL interfaces cost. If you could get full 1.544mbps full duplex emulation off of sdsl why is there no one doing it? Sure would be a lot cheaper to provision. Have you ever gotten 22 simultaneous g.711 calls to run on a 1.5mbps dsl line? (I said 22, not 24, leaving 128kbps for signaling and protocol overhead). My experience and testing sets the real would limits to 20 to 21 on a T1 and 10 to 12 on a 1.5M SDSL circuit. I am not sure that I am that wrong in my original reply, unless there is someone here with more definitive technical references. Never one to take on an entire mailing list, I just want to be sure the next time I spout off about DSL I am certain I know what I am talking about. Live and learn, right? Damon Q: What are the various types of xDSL? A: There are several forms of xDSL, each designed around specific goals and needs of the marketplace. Some forms of xDSL are proprietary, some are simply theoretical models and some are widely used standards. They may best be categorized within the modulation methods used to encode data. Below is a brief summary of some of the known types of xDSL technologies. ADSL Asymmetric Digital Subscriber Line (ADSL) is the most popular form of xDSL technology. The key to ADSL is that the upstream and downstream bandwidth is asymmetric, or uneven. In practice, the bandwidth from the provider to the user (downstream) will be the higher speed path. This is in part due to the limitation of the telephone cabling system and the desire to accommodate the typical Internet usage pattern where the majority of data is being sent to the user (programs, graphics, sounds and video) with minimal upload capacity required (keystrokes and mouse clicks). Downstream speeds typically range from 768 Kb/s to 9 Mb/s Upstream speeds typically range from 64Kb/s to 1.5Mb/s. ADSL Lite (see G.lite) CDSL Consumer Digital Subscriber Line (CDSL) is a proprietary technology trademarked by Rockwell International. CiDSL Globespan's proprietary, splitterless Consumer-installable Digital Subscriber Line (CiDSL). EtherLoop EtherLoop is currently a proprietary technology from Nortel, short for Ethernet Local Loop. EtherLoop uses the advanced signal modulation techniques of DSL and combines them with the half-duplex "burst" packet nature of Ethernet. EtherLoop modems will only generate hi-frequency signals when there is something to send. The rest of the time, they will use only a low-frequency (ISDN-speed) management signal. EtherLoop can measure the ambient noise between packets. This will allow the ability to avoid interference on a packet-by-packet basis by shifting frequencies as necessary. Since EtherLoop will be half-duplex; it is capable of generating the same bandwidth rate in either the upstream or downstream direction, but not simultaneously. Nortel is initially planning for speeds ranging between 1.5Mb/s and 10Mb/s depending on line quality and distance limitations. G.lite A lower data rate version of Asymmetric Digital Subscriber Line (ADSL) was been proposed as an extension to ANSI standard T1.413 by the UAWG (Universal ADSL Working Group) led by Microsoft, Intel, and Compaq. This is known as G.992.2 in the ITU standards committee. It uses the same modulation scheme as ADSL (DMT), but eliminates the POTS splitter at the customer premises. As a result, the ADSL signal is carried over all of the house wiring which results in lower available bandwidth due to greater noise impairments. Often a misnomer, this technology is not splitterless per se. Instead of requiring a splitter at customer premises, the splitting of the signal is done at the local CO. G.shdsl G.shdsl is an ITU standard which offers a rich set of features (e.g. rate adaptive) and offers greater reach than many current standards. G.shdsl also allows for the negotiation of a number of framing protocols including ATM, T1, E1, ISDN and IP. G.shdsl is touted as being able to replace T1, E1, HDSL, SDSL HDSL2, ISDN and IDSL technologies. HDSL High Bit-rate Digital Subscriber Line (HDSL) is generally used as a substitute for T1/E1. HDSL is becoming popular as a way to provide full-duplex symmetric data communication at rates up to 1.544 Mb/s (2.048 Mb/s in Europe) over moderate distances via conventional telephone twisted-pair wires. Traditional T1 (E1 in Europe) requires repeaters every 6000 ft. to boost the signal strength. HDSL has a longer range than T1/E1 without the use of repeaters to allow transmission over distances up to 12,000 feet. It uses pulse amplitude modulation (PAM) on a 4-wire loop. HDSL2 High Bit-rate Digital Subscriber Line 2 was designed to transport T1 signaling at 1.544 Mb/s over a single copper pair. HDSL2 uses overlapped phase Trellis-code interlocked spectrum (OPTIS). IDSL ISDN based DSL developed originally by Ascend Communications. IDSL uses 2B1Q line coding and typically supports data transfer rates of 128 Kb/s. Many end users have had to suffice with IDSL service when full speed ADSL was not available in their area. This technology is similar to ISDN, but uses the full bandwidth of two 64 Kb/s bearer channels plus one 16 Kb/s delta channel. MDSL Usually this stands for multi-rate Digital Subscriber Line (MDSL). It depends on the context of the acronym as to its meaning. It is either a proprietary scheme for SDSL or simply a generic alternative to the more common ADSL name. In the former case, you may see the acronym MSDSL. There is also another proprietary scheme which stands for medium-bit-rate DSL. Confused yet? RADSL Rate Adaptive Digital Subscriber Line (RADSL) is any rate adaptive xDSL modem, but may specifically refer to a proprietary modulation standard designed by Globespan Semiconductor. It uses carrierless amplitude and phase modulation (CAP). T1.413 standard DMT modems are also technically RADSL, but generally not referred to as such. The uplink rate depends on the downlink rate, which is a function of line conditions and signal to noise ratio (SNR). SDSL Symmetric Digital Subscriber Line (SDSL) is a 2-wire implementation of HDSL. Supports T1/E1 on a single pair to a distance of 11,000 ft. The name has become more generic over time to refer to symmetric service at a variety of rates over a single loop. UDSL Universal DSL. See G.lite. VDSL Very High Bit-rate Digital Subscriber Line (VDSL) is proposed for shorter local loops, perhaps up to 3000 ft. Data rates exceed 10 Mb/s. -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Nir Simionovich Sent: Monday, June 13, 2005 7:15 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?
Correct me if I am wrong. I can remember installing a T1's with a HDSL unit at the last CO, in which the T1 was delivered to the customer's prem in two wires. I think they called this fast half-duplex. -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of David Coulson Sent: Monday, June 13, 2005 8:24 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? Leon Sun wrote:> Not really true about T1 description. When you apply for T1, you needtell> vendor if it's channelized or non-ch. If you are going to use it for1.5M> network, you need use unchannelized T1.T1 is T1. How you use the DS0s delivered across it is up to you. You can mux them out to POTS lines, use them all for data or mix it up and run voice and data over the same T1. Telco vendors don't care what you do with it, unless it's terminating for data/voice in their equipment. Even when you use all 24 channels for data, they still function as 24 distinct DS0 channels as far as timing is concerned. Unlike OC-nc circuits (Where you save some overhead for the sake of being unable to channelize the STS channels) , there is no overhead variation when channelizing a DS-1 versus using a full DS-1 for data. David -- David J. Coulson email: david@davidcoulson.net web: http://www.davidcoulson.net/ phone: (216) 920-3100 / (216) 258-4942 _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users This electronic message transmission, including attachments, is for the exclusive use of the individuals to which this e-mail is addressed and is to be reviewed and used exclusively for authorized company purposes. This transmission may contain proprietary, confidential or privileged information. If you are not the intended recipient of this transmission, you are hereby notified that any use, copying, disclosure, dissemination, distribution or taking of any action in reliance upon the contents of this transmission is strictly prohibited. If you believe you may have received this electronic message in error, please notify the sender immediately by return email and delete or destroy the original message and/or any copy of it from your computer system and/or your files. Thank you.
Wiley Siler
2005-Jun-14 06:42 UTC
[Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?
LOL - Well, I think we all know a little more about DSL and T1 now at least.... Cheers all, W -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Nir Simionovich Sent: Tuesday, June 14, 2005 6:42 AM To: 'Asterisk Users Mailing List - Non-Commercial Discussion' Subject: RE: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? Well, None of us is nitpicking here, are we? ;-) Nir S -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Andrew Kohlsmith Sent: Tuesday, June 14, 2005 2:56 PM To: asterisk-users@lists.digium.com Subject: Re: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? On Monday 13 June 2005 21:14, Nir Simionovich wrote:> do a little math (23+1)*64 = 1536kbps = 1.536Mbps, hence the speed for> a single T1 circuit.Your math's a little off. T1 = 24 8-bit channels + 1 frame bit sent 8000 times a second. 24*8 = 192+1 = 193 bits sent 8000 times a second = 1544000bps. Now you don't get to play with the frame bit: 24*8 = 192 * 8000 = 1536000bps, which is the payload data rate of a T1. I won't get into the RBS signaling and framing but you get the idea. -A. _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Filippo Carone
2005-Jun-14 09:29 UTC
[Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?
* Barton Fisher (asterisk@icpage.com) ha scritto:> I found someone offering T1's for $290 a month + Loops or 3 Meg for > $561 a month + Loops. Is this a good deal?when i read so high prices for bandwidth i wonder why i get 10Mbps over optical fiber for 70Euros/month. and i'm not a business customer... fc
Wiley Siler
2005-Jun-14 12:39 UTC
[Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?
Which then presumably leads to higher overselling in the home market since use is presumed lower. Also there are often restriction on the line like no Ips given for servers and no servers allowed. I doubt they really care if we can afford it persay... I think it is just a matter of what pricepoint to what feature set. W>There's also the fact that a lot of companies charge LESS for homeaccess than for a business, under the assumption that the business will utilize it more, and/or can afford the higher price. -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.323 / Virus Database: 267.7.3/15 - Release Date: 6/14/2005 _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Huddleston, Robert
2005-Jun-14 12:49 UTC
[Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?
Anyone paying over $450 for a T1 is being ripped off... If you are in VA,MD,DC,PA,DE,NJ you can get an integrated VoIP T1 for $300 - $400 and a flat internet t1 for about $400. The integrated VoIP T1 is great because it's handed off as an ethernet - no need for a csu/dsu -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Wiley Siler Sent: Tuesday, June 14, 2005 3:39 PM To: Asterisk Users Mailing List - Non-Commercial Discussion; mike@shelcomm.com Subject: RE: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? Which then presumably leads to higher overselling in the home market since use is presumed lower. Also there are often restriction on the line like no Ips given for servers and no servers allowed. I doubt they really care if we can afford it persay... I think it is just a matter of what pricepoint to what feature set. W>There's also the fact that a lot of companies charge LESS for homeaccess than for a business, under the assumption that the business will utilize it more, and/or can afford the higher price. -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.323 / Virus Database: 267.7.3/15 - Release Date: 6/14/2005 _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Wiley Siler
2005-Jun-14 13:07 UTC
[Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?
Telecom has had the world by the short hairs for decades so being overcharged for technology that is 100 years old (excluding T1 and other newer stuff of course) is comepletely old hat for most people... That's why we are all here using VoIP right! Besides, they CAN charge it so they WILL charge it. Bummer but it is what it is... Now if I could just get better than $600ish for a PRI in AZ.... 8) W -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Huddleston, Robert Sent: Tuesday, June 14, 2005 12:49 PM To: 'Asterisk Users Mailing List - Non-Commercial Discussion' Subject: RE: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? Anyone paying over $450 for a T1 is being ripped off... If you are in VA,MD,DC,PA,DE,NJ you can get an integrated VoIP T1 for $300 - $400 and a flat internet t1 for about $400. The integrated VoIP T1 is great because it's handed off as an ethernet - no need for a csu/dsu -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Wiley Siler Sent: Tuesday, June 14, 2005 3:39 PM To: Asterisk Users Mailing List - Non-Commercial Discussion; mike@shelcomm.com Subject: RE: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? Which then presumably leads to higher overselling in the home market since use is presumed lower. Also there are often restriction on the line like no Ips given for servers and no servers allowed. I doubt they really care if we can afford it persay... I think it is just a matter of what pricepoint to what feature set. W>There's also the fact that a lot of companies charge LESS for homeaccess than for a business, under the assumption that the business will utilize it more, and/or can afford the higher price. -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.323 / Virus Database: 267.7.3/15 - Release Date: 6/14/2005 _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Damon Estep
2005-Jun-14 17:37 UTC
[Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?
> Wow! I never learn so much! Thanks Guys > > So if I understand correctly, a full T1 should be 1.5Mbps full duplex. > And > it should support 22 SIP Users at once - Right? > > Bart > >Probably closer to 20 depending on setup/teardown frequency. This is only if the line is dedicated VoIP, no other data traffic. Assuming 64k RTP like g.711 You have to decide how much data and how much voip and define rules on your router (traffic shaping or priority queuing, etc.) to enforce QoS.
Daryl G. Jurbala
2005-Jun-17 07:56 UTC
[Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?
> -----Original Message----- > From: asterisk-users-bounces@lists.digium.com > [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of > Huddleston, Robert > Sent: Tuesday, June 14, 2005 3:49 PM > To: 'Asterisk Users Mailing List - Non-Commercial Discussion' > Subject: RE: [Asterisk-Users] Should I choose DSL @ 1.5 or a full T1? > > Anyone paying over $450 for a T1 is being ripped off... > If you are in VA,MD,DC,PA,DE,NJ you can get an integrated > VoIP T1 for $300 - $400 and a flat internet t1 for about $400. > The integrated VoIP T1 is great because it's handed off as an > ethernet - no need for a csu/dsuUmmm...no. Maybe if you are in or very near a city you can, but not everywhere. You find me a reliable Teir 1 ISP T1 in New Hope, PA for $300 to $400 and I'll give you the amount I save over the next quarter. NPA-NXX is 215-862. Good luck. voiceverified. | Daryl G. Jurbala -------------- | Chief Technology Officer | 215.862.1160 x235 (Office) It had to be you! | 215.862.9880 (FAX)
Darren Wright
2005-Jun-17 16:11 UTC
[Asterisk-Users] Should I choose DSL @ 1.5 or a full T1?
You find me a reliable Teir 1 ISP T1 in New Hope, PA for $300 to $400 and I'll give you the amount I save over the next quarter. NPA-NXX is 215-862. Good luck. I've got a Full T1 from a rather large Mid-Atlantic CLEC for $291. I've got about ? dozen of them from DC to Trenton, NJ. -Darren -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20050617/b2acf474/attachment.htm