RE: [Asterisk-Users] Satellite Providers
I am operations vp for a wholesale VOIP network and we have customers sending us VOIP over satellite that works quite well.Several well known carriers just do not work for VOIP in my experience. [EMAIL PROTECTED] -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bruce Komito Sent: Wednesday, May 11, 2005 19:11 To: Chad Wicker Cc: asterisk-users@lists.digium.com Subject: Re: [Asterisk-Users] Satellite Providers I don't doubt at all what you are saying. We never tested a truly high-end solution such as the one you described, because the cost would have been prohibitive for our application. I'm sure we only evaluated shared solutions. I guess my mistake was believing the CIR claims. At the really low-end, I didn't expect much, since they don't offer ANY CIR. But when they claimed 64k, silly me, I believed it. Bruce Komito High Sierra Networks, Inc. www.servers-r-us.com (775) 236-5815 On Wed, 11 May 2005, Chad Wicker wrote: Well there are several problems in your description of Satellite services. For one you are grouping several differing technilogies together as one. What it seemed like you were testing was a shared bandwidth solution typically used by providers to reduce cost. It isn't uncommon to experience sever delays and packet loss on these types of systems. Alot of these shared providers claim 64k cir then oversubscribe over that. Lies, yes, theift yes, and they get away with it... What you would want to ask for is a SCPC (Single Carrier Per Channel) circuit and you should have much better results, cost? a lot more than these shared solutions. You may want to look into the maritime providers/teleports in the area for this type of service. Delay for a decent circuit should not be over 600 ms and it should be steady. Proof is in the pudding, in a SCPC circuit with a v.35 interface you can run an extended BERT test on it without error. and that's Sync data... I speak confidently on this as we are a provider of VSAT services in the oilfield industry. We are bombarded with these low cost competition and have to defend ourselves daily. Alot of providers sell crap at a decent price. We don't and won't. It hurts our market penetration but we tend to keep customers for a good long time. I can answer a lot of questions on this subject if anyone needs. It's a lot like point to point microwave, they experienced their bandwidth sharing days and they quickly died on the vine. The driving force behind shared solutions is that satellite bandwidth is expensive. Chad C. Wicker Systems Engineer Petrocom [EMAIL PROTECTED] 5/11/2005 1:06:52 PM We looked at this earlier this year and, after evaluating several companies, could not get it to work well enough. The problem didn't seem to be latency, but rather lost packets in the upstream direction. Most of the time, we couldn't even get the phone to register, but even when we could, there was such a large amount of breakup (in the up direction) that it was nearly unusable. We tried low-end, consumer type services and they didn't work at all. Even the high-end services that claim to offer guaranteed bandwidth apparently do not live up to their claims. We tried running G.729, which should only need about 32-40k over a link that claimed to guarantee 64k, and the best we got was broken sound. Bruce Komito High Sierra Networks, Inc. www.servers-r-us.com (775) 236-5815 On Wed, 11 May 2005, Yiannis Costopoulos wrote: Hi All, I am investigating the deployment of VoIP/* in Eastern European areas where there is no PSTN infrastructure. As you can understand DSL/Cable connections are a dream. The only option is satellite. Does anyone know of any satellite providers that have low enough/acceptable delays for VoIP? Thanks, Yiannis. ___ 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 message has been categorized as Legitimate by Bayesian Analyzer. If you do not agree, please click on the link below to train the Analyzer. http://nospam.wpti.net/bt/a.aspx?M=C:%5Csmtpmail%5CBayesTraining%5C200 5-05-11%5Cc819e577de1140fbaa62d0a53c83de86C=2 -- -- - This message has been inspected by DynaComm i:mail -- - ___ 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] Satellite Providers
Hi All, I am investigating the deployment of VoIP/* in Eastern European areas where there is no PSTN infrastructure. As you can understand DSL/Cable connections are a dream. The only option is satellite. Does anyone know of any satellite providers that have low enough/acceptable delays for VoIP? Thanks, Yiannis. ___ 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
Re: [Asterisk-Users] Satellite Providers
We looked at this earlier this year and, after evaluating several companies, could not get it to work well enough. The problem didn't seem to be latency, but rather lost packets in the upstream direction. Most of the time, we couldn't even get the phone to register, but even when we could, there was such a large amount of breakup (in the up direction) that it was nearly unusable. We tried low-end, consumer type services and they didn't work at all. Even the high-end services that claim to offer guaranteed bandwidth apparently do not live up to their claims. We tried running G.729, which should only need about 32-40k over a link that claimed to guarantee 64k, and the best we got was broken sound. Bruce Komito High Sierra Networks, Inc. www.servers-r-us.com (775) 236-5815 On Wed, 11 May 2005, Yiannis Costopoulos wrote: Hi All, I am investigating the deployment of VoIP/* in Eastern European areas where there is no PSTN infrastructure. As you can understand DSL/Cable connections are a dream. The only option is satellite. Does anyone know of any satellite providers that have low enough/acceptable delays for VoIP? Thanks, Yiannis. ___ 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 message has been categorized as Legitimate by Bayesian Analyzer. If you do not agree, please click on the link below to train the Analyzer. http://nospam.wpti.net/bt/a.aspx?M=C:%5Csmtpmail%5CBayesTraining%5C2005-05-11%5Cc819e577de1140fbaa62d0a53c83de86C=2 -- --- This message has been inspected by DynaComm i:mail --- ___ 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
Re: [Asterisk-Users] Satellite Providers
Hi All, I am investigating the deployment of VoIP/* in Eastern European areas where there is no PSTN infrastructure. As you can understand DSL/Cable connections are a dream. The only option is satellite. Does anyone know of any satellite providers that have low enough/acceptable delays for VoIP? Thanks, Yiannis. You might want to have a look at Aramiska - They already have skype listed on their pages as an option. ___ 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
RE: [Asterisk-Users] Satellite Providers
Satellite delays are always bad. It is more a delay because of the time it takes a signal to travel to the satellite and back to a receiving station. You might want to check into ground station to station microwave communications stations. The best is to have a tap to a phone company that may have cell towers in the area. Cheers, Max Original Message Subject: [Asterisk-Users] Satellite Providers From: Yiannis Costopoulos [EMAIL PROTECTED] Date: Wed, May 11, 2005 12:23 pm To: asterisk-users@lists.digium.com Hi All, I am investigating the deployment of VoIP/* in Eastern European areas where there is no PSTN infrastructure. As you can understand DSL/Cable connections are a dream. The only option is satellite. Does anyone know of any satellite providers that have low enough/acceptable delays for VoIP? Thanks, Yiannis. ___ 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
RE: [Asterisk-Users] Satellite Providers
I have a number of VSAT links from Africa to the US. They all run 530ms, you can not defy the laws of physics. Across 4 different birds the latency is virtually identical. John Dunham -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of bryan hepworth Sent: Wednesday, May 11, 2005 1:30 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Satellite Providers Hi All, I am investigating the deployment of VoIP/* in Eastern European areas where there is no PSTN infrastructure. As you can understand DSL/Cable connections are a dream. The only option is satellite. Does anyone know of any satellite providers that have low enough/acceptable delays for VoIP? Thanks, Yiannis. You might want to have a look at Aramiska - They already have skype listed on their pages as an option. ___ 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
Re: [Asterisk-Users] Satellite Providers
The delay in the air is minor. Radio travels very fast through the air. Almost at the speed of light. It's the electronics that are causing the delays. The less electronics touching your signal the better. The up and down is very fast. But then you have all the converts and the land line links to factor in. Microwave also has delays such as the Motorola equipment which is only half duplex. This will also incress the time. Max is right, check into some ground based systems. Max W Blackmer Jr wrote: Satellite delays are always bad. It is more a delay because of the time it takes a signal to travel to the satellite and back to a receiving station. You might want to check into ground station to station microwave communications stations. The best is to have a tap to a phone company that may have cell towers in the area. Cheers, Max Original Message Subject: [Asterisk-Users] Satellite Providers From: "Yiannis Costopoulos" [EMAIL PROTECTED] Date: Wed, May 11, 2005 12:23 pm To: asterisk-users@lists.digium.com Hi All, I am investigating the deployment of VoIP/* in Eastern European areas where there is no PSTN infrastructure. As you can understand DSL/Cable connections are a dream. The only option is satellite. Does anyone know of any satellite providers that have low enough/acceptable delays for VoIP? Thanks, Yiannis. ___ 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
Re: [Asterisk-Users] Satellite Providers
Michael D Schelin wrote: The delay in the air is minor. Radio travels very fast through the air. Almost at the speed of light. It's the electronics that are causing the delays. The less electronics touching your signal the better. The up and down is very fast. But then you have all the converts and the land line links to factor in. Microwave also has delays such as the Motorola equipment which is only half duplex. This will also incress the time. Max is right, check into some ground based systems. Huh? 44,000mi (up and down) @ 186,000mi/sec = 0.24sec. Not a minor latency for voice comms. ___ 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
Re: [Asterisk-Users] Satellite Providers
Well there are several problems in your description of Satellite services. For one you are grouping several differing technilogies together as one. What it seemed like you were testing was a shared bandwidth solution typically used by providers to reduce cost. It isn't uncommon to experience sever delays and packet loss on these types of systems. Alot of these shared providers claim 64k cir then oversubscribe over that. Lies, yes, theift yes, and they get away with it... What you would want to ask for is a SCPC (Single Carrier Per Channel) circuit and you should have much better results, cost? a lot more than these shared solutions. You may want to look into the maritime providers/teleports in the area for this type of service. Delay for a decent circuit should not be over 600 ms and it should be steady. Proof is in the pudding, in a SCPC circuit with a v.35 interface you can run an extended BERT test on it without error. and that's Sync data... I speak confidently on this as we are a provider of VSAT services in the oilfield industry. We are bombarded with these low cost competition and have to defend ourselves daily. Alot of providers sell crap at a decent price. We don't and won't. It hurts our market penetration but we tend to keep customers for a good long time. I can answer a lot of questions on this subject if anyone needs. It's a lot like point to point microwave, they experienced their bandwidth sharing days and they quickly died on the vine. The driving force behind shared solutions is that satellite bandwidth is expensive. Chad C. Wicker Systems Engineer Petrocom [EMAIL PROTECTED] 5/11/2005 1:06:52 PM We looked at this earlier this year and, after evaluating several companies, could not get it to work well enough. The problem didn't seem to be latency, but rather lost packets in the upstream direction. Most of the time, we couldn't even get the phone to register, but even when we could, there was such a large amount of breakup (in the up direction) that it was nearly unusable. We tried low-end, consumer type services and they didn't work at all. Even the high-end services that claim to offer guaranteed bandwidth apparently do not live up to their claims. We tried running G.729, which should only need about 32-40k over a link that claimed to guarantee 64k, and the best we got was broken sound. Bruce Komito High Sierra Networks, Inc. www.servers-r-us.com (775) 236-5815 On Wed, 11 May 2005, Yiannis Costopoulos wrote: Hi All, I am investigating the deployment of VoIP/* in Eastern European areas where there is no PSTN infrastructure. As you can understand DSL/Cable connections are a dream. The only option is satellite. Does anyone know of any satellite providers that have low enough/acceptable delays for VoIP? Thanks, Yiannis. ___ 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 message has been categorized as Legitimate by Bayesian Analyzer. If you do not agree, please click on the link below to train the Analyzer. http://nospam.wpti.net/bt/a.aspx?M=C:%5Csmtpmail%5CBayesTraining%5C2005-05-11%5Cc819e577de1140fbaa62d0a53c83de86C=2 -- --- This message has been inspected by DynaComm i:mail --- ___ 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
Re: [Asterisk-Users] Satellite Providers
The altitude of a geostationary satellite is about 37500 km for a round trip distance of aboyt 75000 km. Light travels at 300,000 km/second, so you have a latency of about 250 ms per hop. That is just for the transit time to and from the bird. Since you have a two way conversation, a caller asking a question would have to wait a minimum of 500 ms for a reply. This does not include any signal processing that might take place. In other words, you will still have to account for the normal voip latency. A satellite path might have several hops, each adding its own 500 ms delay. With a geostationary satellite, you really can't have anything approaching a full duplex/real time telephone conversation. The conversations you have would more closely resemble simplex two-way radio conversation. That being said, if that's all you have, useful communications can be had using this mode. The International space station, for instance. uses several TDRS satellites to communicate with Houston. The big thing is training the users. Bill On 5/11/05, Yiannis Costopoulos [EMAIL PROTECTED] wrote: Hi All, I am investigating the deployment of VoIP/* in Eastern European areas where there is no PSTN infrastructure. As you can understand DSL/Cable connections are a dream. The only option is satellite. Does anyone know of any satellite providers that have low enough/acceptable delays for VoIP? Thanks, Yiannis. ___ 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
Re: Re: [Asterisk-Users] Satellite Providers
Aparantly Light Travels Faster in your world than it does in mine. As an example, A new Satellite that was launched Just a few days ago (April 26) is in orbit at 22,300 MILES above earth. Assuming that both ends of the transmission are directly below the Satellite (Which they will not normally be, adding even a few more percentage points of distance to this calculation); the total round trip distance is 44,600 MILES. Again, Assuming a perfect world where humans didn't need to breathe or be protected from UV and other cosmic rays which would allow us the opportunity of moving light at 186,000 miles per second, that means that the time IN ONE DIRECTION to get data from point a to point b with absolutely NO 'electronic' delays would be 44,600 Miles / 186,000 Miles/Sec = 240ms. PING Time would be double that, or about 480ms Seems that John Dunham only has 50ms (OR LESS) of 'electronic' delay in his VSAT Links (And again, that assumes that both point a and point b are DIRECLTY under the satellite, which I doubt they are), and that sounds like a relatively small percentage of the total delay when compared to 480 ms of 'through the air' time. Best Regards, Ben Bawkon The delay in the air is minor. Radio travels very fast through the air. Almost at the speed of light. It's the electronics that are causing the delays. The less electronics touching your signal the better. The up and down is very fast. But then you have all the converts and the land line links to factor in. Microwave also has delays such as the Motorola equipment which is only half duplex. This will also incress the time. Max is right, check into some ground based systems. Max W Blackmer Jr wrote: Satellite delays are always bad. It is more a delay because of the time it takes a signal to travel to the satellite and back to a receiving station. You might want to check into ground station to station microwave communications stations. The best is to have a tap to a phone company that may have cell towers in the area. Cheers, Max This message was checked by MailScan for WorkgroupMail. www.govarion.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
Re: [Asterisk-Users] Satellite Providers
Michael Welter wrote: Michael D Schelin wrote: The delay in the air is minor. Radio travels very fast through the air. Almost at the speed of light. It's the electronics that are causing the delays. The less electronics touching your signal the better. The up and down is very fast. But then you have all the converts and the land line links to factor in. Microwave also has delays such as the Motorola equipment which is only half duplex. This will also incress the time. Max is right, check into some ground based systems. Huh? 44,000mi (up and down) @ 186,000mi/sec = 0.24sec. Not a minor latency for voice comms. Before undersea fibre made undersea cables cheap, satellite was far cheaper than undersea copper. In those days intercontinental calls were usually satellite one way and undersea cable the other. When satellite was used both was conversation suffered badly. If you made a call from Europe to American, and it was satellite both ways because the cable was all used up you really know about it, and often abandoned the call. 2 x 0.24s is getting beyond the limit of what is reasonable. Regards, Steve ___ 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
RE: [Asterisk-Users] Satellite Providers
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bruce Komito Sent: Thursday, 12 May 2005 4:07 AM To: Yiannis Costopoulos Cc: asterisk-users@lists.digium.com Subject: Re: [Asterisk-Users] Satellite Providers We looked at this earlier this year and, after evaluating several companies, could not get it to work well enough. The problem didn't seem to be latency, but rather lost packets in the upstream direction. Most of the time, we couldn't even get the phone to register, but even when we could, there was such a large amount of breakup (in the up direction) that it was nearly unusable. We tried low-end, consumer type services and they didn't work at all. Even the high-end services that claim to offer guaranteed bandwidth apparently do not live up to their claims. We tried running G.729, which should only need about 32-40k over a link that claimed to guarantee 64k, and the best we got was broken sound. Hi, You need to do 2 things...: 1, install bandwidth shaping, vlan, tos/qos in order to guarantee the priority to VoIP data 2, check the TX power if it is the uplink that is failing. 3, check your QSPKBER, and both corrected and uncorrected error rates, as see if there is not some other evil hapenning, that udp doesn't deal with like tcp does. I use low cost vsat for VoIP data all the time, and it works fine. Bruce Komito High Sierra Networks, Inc. www.servers-r-us.com (775) 236-5815 On Wed, 11 May 2005, Yiannis Costopoulos wrote: Hi All, I am investigating the deployment of VoIP/* in Eastern European areas where there is no PSTN infrastructure. As you can understand DSL/Cable connections are a dream. The only option is satellite. Does anyone know of any satellite providers that have low enough/acceptable delays for VoIP? Thanks, Yiannis. ___ 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 message has been categorized as Legitimate by Bayesian Analyzer. If you do not agree, please click on the link below to train the Analyzer. http://nospam.wpti.net/bt/a.aspx?M=C:%5Csmtpmail%5CBayesTraining%5C200 5-05-11%5Cc819e577de1140fbaa62d0a53c83de86C=2 -- -- - This message has been inspected by DynaComm i:mail -- - ___ 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
Re: [Asterisk-Users] Satellite Providers
I don't doubt at all what you are saying. We never tested a truly high-end solution such as the one you described, because the cost would have been prohibitive for our application. I'm sure we only evaluated shared solutions. I guess my mistake was believing the CIR claims. At the really low-end, I didn't expect much, since they don't offer ANY CIR. But when they claimed 64k, silly me, I believed it. Bruce Komito High Sierra Networks, Inc. www.servers-r-us.com (775) 236-5815 On Wed, 11 May 2005, Chad Wicker wrote: Well there are several problems in your description of Satellite services. For one you are grouping several differing technilogies together as one. What it seemed like you were testing was a shared bandwidth solution typically used by providers to reduce cost. It isn't uncommon to experience sever delays and packet loss on these types of systems. Alot of these shared providers claim 64k cir then oversubscribe over that. Lies, yes, theift yes, and they get away with it... What you would want to ask for is a SCPC (Single Carrier Per Channel) circuit and you should have much better results, cost? a lot more than these shared solutions. You may want to look into the maritime providers/teleports in the area for this type of service. Delay for a decent circuit should not be over 600 ms and it should be steady. Proof is in the pudding, in a SCPC circuit with a v.35 interface you can run an extended BERT test on it without error. and that's Sync data... I speak confidently on this as we are a provider of VSAT services in the oilfield industry. We are bombarded with these low cost competition and have to defend ourselves daily. Alot of providers sell crap at a decent price. We don't and won't. It hurts our market penetration but we tend to keep customers for a good long time. I can answer a lot of questions on this subject if anyone needs. It's a lot like point to point microwave, they experienced their bandwidth sharing days and they quickly died on the vine. The driving force behind shared solutions is that satellite bandwidth is expensive. Chad C. Wicker Systems Engineer Petrocom [EMAIL PROTECTED] 5/11/2005 1:06:52 PM We looked at this earlier this year and, after evaluating several companies, could not get it to work well enough. The problem didn't seem to be latency, but rather lost packets in the upstream direction. Most of the time, we couldn't even get the phone to register, but even when we could, there was such a large amount of breakup (in the up direction) that it was nearly unusable. We tried low-end, consumer type services and they didn't work at all. Even the high-end services that claim to offer guaranteed bandwidth apparently do not live up to their claims. We tried running G.729, which should only need about 32-40k over a link that claimed to guarantee 64k, and the best we got was broken sound. Bruce Komito High Sierra Networks, Inc. www.servers-r-us.com (775) 236-5815 On Wed, 11 May 2005, Yiannis Costopoulos wrote: Hi All, I am investigating the deployment of VoIP/* in Eastern European areas where there is no PSTN infrastructure. As you can understand DSL/Cable connections are a dream. The only option is satellite. Does anyone know of any satellite providers that have low enough/acceptable delays for VoIP? Thanks, Yiannis. ___ 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 message has been categorized as Legitimate by Bayesian Analyzer. If you do not agree, please click on the link below to train the Analyzer. http://nospam.wpti.net/bt/a.aspx?M=C:%5Csmtpmail%5CBayesTraining%5C2005-05-11%5Cc819e577de1140fbaa62d0a53c83de86C=2 -- --- This message has been inspected by DynaComm i:mail --- ___ 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 This message has been categorized as Indeterminate by Bayesian Analyzer. Please click on this link if this message is a Spam http://nospam.wpti.net/bt/a.aspx?M=C:%5Csmtpmail%5CBayesTraining%5C2005-05-11%5C5b4b9ad2019e496995ded0f9813f6c7aC=2 Or on this link if this message
RE: [Asterisk-Users] Satellite Providers
The delay in the air is minor. Radio travels very fast through the air. Almost at the speed of light. It may travel very fast but its also a very long way, 22,000 miles up, then 22,000 miles down, then the same all over again. The latency for satellite is about 500ms round trip, thats a lot. Its on the very edge of whats possible for VOIP. I looked at Satellite and decided it was not competitive. Chris ___ 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
Re: [Asterisk-Users] Satellite Providers
Even though radio travels very fast ...300,000 km/s (186,000 mph) the speed is finite. As I said In my previous post...the satellite is located 34,500 km (22,500 mi.) above the equator. That makes for a round trip of 75,000 km (45,000 mi). Even at the speed of light, this makes for a significant delay!) Bill On 5/11/05, Michael D Schelin [EMAIL PROTECTED] wrote: The delay in the air is minor. Radio travels very fast through the air. Almost at the speed of light. It's the electronics that are causing the delays. The less electronics touching your signal the better. The up and down is very fast. But then you have all the converts and the land line links to factor in. Microwave also has delays such as the Motorola equipment which is only half duplex. This will also incress the time. Max is right, check into some ground based systems. Max W Blackmer Jr wrote: Satellite delays are always bad. It is more a delay because of the time it takes a signal to travel to the satellite and back to a receiving station. You might want to check into ground station to station microwave communications stations. The best is to have a tap to a phone company that may have cell towers in the area. Cheers, Max Original Message Subject: [Asterisk-Users] Satellite Providers From: Yiannis Costopoulos [EMAIL PROTECTED] Date: Wed, May 11, 2005 12:23 pm To: asterisk-users@lists.digium.com Hi All, I am investigating the deployment of VoIP/* in Eastern European areas where there is no PSTN infrastructure. As you can understand DSL/Cable connections are a dream. The only option is satellite. Does anyone know of any satellite providers that have low enough/acceptable delays for VoIP? Thanks, Yiannis. ___ 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
