Great video and tutorial. I was a telephoneman for years at Pacific Bell and was never thought such in dept info like this video. I actually learnt a lot and have a better understanding after viewing this.
Thanks for your comment. We try to make unique telecom videos that can be of help to professionals or general interest. Did you see our video "HOW DSL LINES WORK"? Let us know if there is a telecom video you"ll like to see.
Been using this video as a reference for about 2 years now for pbond bells training was horrible this video I’ve actually learnt things I can use in the field thanks a bunch!
ADSL simply means asymmetric DSL. This because the speed down is much faster than the speed up. SDSL is synchronus DSL. Both the speed up and speed down operate at the same speed.
That is correct. Most DSL lines are ADSL because most subscribers download more than they upload so they require a higher download speed. SDSL lines are needed by subscribers who may need a higher upload speed as well. like from a web server or mail server etc.
It would be helpful if you showed some real life examples of what these items like, for example what a DSLAM looks like in the real world in use as I have no clue what it looks like and all this video did was make me want to go down a rabbit hole googling trying to find what some of these utilities look like around my area.
So the bonding happens on premise right? Where do I get these bonding routers? Would I be able to bond 2 separate VDSL lines (each with their own router/modem) into 1?
The type of bonding I am talking about has the modem being bonded as well as both DSLAM cards bonded together. The dslam cards are connected to two dsl lines. Bonded to work as one. The DSLAM card balances the load between lines and increase over all line speed. I use one DSL modem with 2 DSL line inputs and the modem is supplied by the ISP.
It may be the best speed depending on the length of the copper line between your home and the node or it could be a defective line. You may want to contact your ISP to see if you can get the speed which you are paying for. In case its a distance issue, you may want to ask about DSL bonding. May be they would give you at the same price. Thanks for the question and Let me know if they were able to help you, and what they did. Good luck.
question not sure if u will be able to answer but why can't ISP just give everyone who wants bonded a bonded connection for example where I live we use to have a bonded connection but got knocked off thanks to Centurylinks shady business practices (had it for 2 years but when I got my own modem from them they got rid of our bonded saying they don't serve it in my area) and are unable to get it back
Hi Jack, that is a very good questions. However with out knowing if there is a technical reason for your area being denied dsl bonding service, I can't really provide an answer. Technically for an ISP to have DSL Bonding they need a DSLAM that is capable of bonding and two good quality cable pairs to transport the service to the subscriber, and of course the shorter the length of the cable pairs, the higher the speed will be. Thanks again for the question Jack, and I hope my answer was helpful to you.
I have a question can i run vdsl on a single pair cable ? My isp uses this cable for adsl2+ lines : imgur.com/a/jmqE3Gi Which is a Bell system type C rural service drop cable ( conductors : 14 or 12 AWG solid 30% conductivity extra high strength copper-covered steel) it is an old cable buit surprisingly i still get a decent attenuation and internet speeds for adsl2+ "here my router stats": imgur.com/a/OIRjrLn) 14.5 db attenuation / 8 SNR margin / around 21/22 mbps max bit rate line.
Basic ADSL and VDSL use just a single pair of wires. A second pair is used as with pair bonding in order to increase the speed. The thicker gauge wire like 12 or 14 would definitely help improve performance.
I believe that your question is if you need to know how to work with copper before doing Fiber Optics. Its is not neccessary to be an expert, but you should at least have a basic understanding of copper, and how phones and DSL lines work with copper. I would suggest getting at least a basic understanding of telecommunications on copper before doing Fiber Optics. Hope I was able to answer your question.
Thanks for the question. It would be nice to have data sent over the internet arriving at your modem instantly. However, everything takes time, and the time data takes to get from its origin to its destination is referred to as latency. We strive to reduce latency with DSL lines by combining two DSL lines which is known as DSL Bonding. The reason we have DSL Bonding is to increase the speed of the line. Increasing the speed would get your requested data to your device much faster, thereby reducing the latency. Higher speed results in lower latency and lower speed results in higher latency. I hope this explanation was helpful.
There is no technical way to have one DSL line work with two modems at this time. However connecting two twisted pair lines to one modem is possible as described in the video whch is cslled DSL bonding.
Although the general concept is sound, there are numerous inaccuracies present in this video. While the video may be well-represented for the average user, an expert in the field will notice many misrepresentations.
I think one small inaccuracy is the splitter with the VDSL setup: I don't have it any more. All the analog phone communications has been replaced with Internet based phone calls (VoIP) nowadays, the modem/router is typically responsible to tunnel this phone communication as well as and provide the analog RJ11 connector at the user end (maybe splitting it with a separate VLAN ID). But anyways, many thanks for explaining the main concepts!
I just noticed this comment which was made a while back. The comment is that Analog Phones service has been replaced by VOIP, and it's not used anymore so splitters are not needed. This is not correct. Some phone companies may have gone that route, however the majority of Telephone companies in North America and in most other countries still use analog phone service and require a splitter which is used to separate DSL service from the analog phone service because they share the same physical copper line. Hope this was helpful.
@@JamieDelour One of the largest IPTV deployments in North America has successfully delivered IPTV services on speeds as low as 4mb down 1mb up over bonded ADSL2+ for standard definition. Similarly, VOIP services have been delivered on speeds as slow as 1.5m down by .5m up over ADSL/ATM. Regarding pair-bonding, when pair-bonding is accomplished, separate cards are not used. Instead, the same card is used, but with different ports on that card. Typically, the ports are side-by-side and consecutive. While there may be a few other minor discrepancies, they mainly concern terminology. Overall, this video provides a good overview of the concept and technology of DSL, and would be helpful for an average consumer or novelist to gain a better understanding of the technology. However, for an expert in the industry or a field technician, this video may be mildly misleading. It's worth noting that speeds less than 10mb in most cases do not provide a good quality experience in today's high demand internet. Therefore, it's important to have a good understanding of the capabilities and limitations of DSL technology to make informed decisions when selecting an internet service provider.
@@TelecomTraining I agree with this statement as both FCC regulations and most local state regulations mandate that copper telephone services be maintained and offered in almost all jurisdictions and exchanges. Although many companies are transitioning to VOIP in today's modern telecommunications network infrastructure, it is important to note that the vast majority of rural areas in the United States still do not have access to VOIP and continue to rely on traditional POTS telephone service over legacy copper wires.
Don't worry bro I clicked like but honestly you don't see DSL much anymore here in my town in Minnesota all it is spectrum CenturyLink they can't go over a few megabytes nobody uses it here
It depends on the type of DSL and distance. I can get cable and AT&T internet. I get 100 Mbps down 20 Mbps up from AT&T and it's VDSL2. But they use pair bonding and I'm close to the node (AT&T calls it a VRAD). Went with the VDSL2 because it includes unlimited data and it's 55 bucks a month.
@@sean8102 dude that's not that bad at my work they have arvig and they're so close to the node they can get the same speeds as you that's freaking sweet ✌️
I remember back in '99 when I was 16 in high school. My sister and I were having "phone wars" (shed pick up the phone on a 10M 4h download at 98%, I'd kick her off a call to return the favor). 15,000 and change feet yet 50 feet too far. Convinced everyone to go to a payphone while they qualified it with a phone plugged directly into the NID. Almost didn't work... but they tried a different card. One of the happiest days of my life - 26kb down / 16k up (and she could be on the phone at the same time). "Yeah b*tch!" Looking back, 20 years later though it sucks that they still have some customers I know with this same speed
Great video and tutorial. I was a telephoneman for years at Pacific Bell and was never thought such in dept info like this video. I actually learnt a lot and have a better understanding after viewing this.
Thanks for your comment. We try to make unique telecom videos that can be of help to professionals or general interest. Did you see our video "HOW DSL LINES WORK"? Let us know if there is a telecom video you"ll like to see.
Been using this video as a reference for about 2 years now for pbond bells training was horrible this video I’ve actually learnt things I can use in the field thanks a bunch!
No problem. I worked as a field tech for many years and poor training was the norm, so I am always happy to help.
ADSL simply means asymmetric DSL. This because the speed down is much faster than the speed up.
SDSL is synchronus DSL. Both the speed up and speed down operate at the same speed.
That is correct. Most DSL lines are ADSL because most subscribers download more than they upload so they require a higher download speed. SDSL lines are needed by subscribers who may need a higher upload speed as well. like from a web server or mail server etc.
GREAT GREAT GREAT explanation. thank you so much
Thank you so much.
Thank you so much this is really helpful!
Thank you, I do appreciate the feedback.
It would be helpful if you showed some real life examples of what these items like, for example what a DSLAM looks like in the real world in use as I have no clue what it looks like and all this video did was make me want to go down a rabbit hole googling trying to find what some of these utilities look like around my area.
Thanks for the feed back. I'll work on getting that info out in another video.
plz suggest me a best splitter
I am sure they are many good splitters out here. I can only say that I used corning splitters and it worked well. Just google corning pots splitter.
So the bonding happens on premise right? Where do I get these bonding routers? Would I be able to bond 2 separate VDSL lines (each with their own router/modem) into 1?
The type of bonding I am talking about has the modem being bonded as well as both DSLAM cards bonded together. The dslam cards are connected to two dsl lines. Bonded to work as one. The DSLAM card balances the load between lines and increase over all line speed.
I use one DSL modem with 2 DSL line inputs and the modem is supplied by the ISP.
You are doing really great job. Thank you so much.
Thank you!! Do appreciate the feedback.
Question. What happens if an ISP runs out of ports in the DSLAM? Do they install another DSLAM or just tell the customer SOL?
Generally The ISP would install more DSLAM ports than needed for each area, however if this should happen, they would just install another DSLAM.
@@TelecomTraining Thank you.
was 20 mbps the max speed? i have fttn internet and i pay for 50 mbps
It may be the best speed depending on the length of the copper line between your home and the node or it could be a defective line. You may want to contact your ISP to see if you can get the speed which you are paying for. In case its a distance issue, you may want to ask about DSL bonding. May be they would give you at the same price. Thanks for the question and Let me know if they were able to help you, and what they did. Good luck.
Best video out there for this topic, thank you
Glad it was helpful!
question not sure if u will be able to answer but why can't ISP just give everyone who wants bonded a bonded connection for example where I live we use to have a bonded connection but got knocked off thanks to Centurylinks shady business practices (had it for 2 years but when I got my own modem from them they got rid of our bonded saying they don't serve it in my area) and are unable to get it back
Hi Jack, that is a very good questions. However with out knowing if there is a technical reason for your area being denied dsl bonding service, I can't really provide an answer. Technically for an ISP to have DSL Bonding they need a DSLAM that is capable of bonding and two good quality cable pairs to transport the service to the subscriber, and of course the shorter the length of the cable pairs, the higher the speed will be. Thanks again for the question Jack, and I hope my answer was helpful to you.
I have a question can i run vdsl on a single pair cable ?
My isp uses this cable for adsl2+ lines : imgur.com/a/jmqE3Gi Which is a Bell system type C rural service drop cable ( conductors : 14 or 12 AWG solid 30% conductivity extra high
strength copper-covered steel) it is an old cable buit surprisingly i still get a decent attenuation and internet speeds for adsl2+ "here my router stats": imgur.com/a/OIRjrLn)
14.5 db attenuation / 8 SNR margin / around 21/22 mbps max bit rate line.
Basic ADSL and VDSL use just a single pair of wires. A second pair is used as with pair bonding in order to increase the speed. The thicker gauge wire like 12 or 14 would definitely help improve performance.
VDSL / VDSL2 could also be referred to as Fiber To the Cabinet (FTTC)
That would work as well.
sir if u train to fiber optic is ur 1st step is copper?
I believe that your question is if you need to know how to work with copper before doing Fiber Optics. Its is not neccessary to be an expert, but you should at least have a basic understanding of copper, and how phones and DSL lines work with copper. I would suggest getting at least a basic understanding of telecommunications on copper before doing Fiber Optics. Hope I was able to answer your question.
Is bonding technology reducing latency or increasing?
Thanks for the question. It would be nice to have data sent over the internet arriving at your modem instantly. However, everything takes time, and the time data takes to get from its origin to its destination is referred to as latency. We strive to reduce latency with DSL lines by combining two DSL lines which is known as DSL Bonding. The reason we have DSL Bonding is to increase the speed of the line. Increasing the speed would get your requested data to your device much faster, thereby reducing the latency. Higher speed results in lower latency and lower speed results in higher latency. I hope this explanation was helpful.
Can I connect to one line 2 modems?
There is no technical way to have one DSL line work with two modems at this time. However connecting two twisted pair lines to one modem is possible as described in the video whch is cslled DSL bonding.
Thank you so much
You are welcome.
VDSL stands for: Very high-speed Digital Subscriber Line (wikipedia)
Or very high bit rate
But not very high frequency (even if it is true)
In comparison to adsl yes it is and that’s what it’s referring too!
Although the general concept is sound, there are numerous inaccuracies present in this video. While the video may be well-represented for the average user, an expert in the field will notice many misrepresentations.
Would you care to elaborate? this will help everyone
I think one small inaccuracy is the splitter with the VDSL setup: I don't have it any more. All the analog phone communications has been replaced with Internet based phone calls (VoIP) nowadays, the modem/router is typically responsible to tunnel this phone communication as well as and provide the analog RJ11 connector at the user end (maybe splitting it with a separate VLAN ID).
But anyways, many thanks for explaining the main concepts!
I just noticed this comment which was made a while back. The comment is that Analog Phones service has been replaced by VOIP, and it's not used anymore so splitters are not needed. This is not correct. Some phone companies may have gone that route, however the majority of Telephone companies in North America and in most other countries still use analog phone service and require a splitter which is used to separate DSL service from the analog phone service because they share the same physical copper line. Hope this was helpful.
@@JamieDelour One of the largest IPTV deployments in North America has successfully delivered IPTV services on speeds as low as 4mb down 1mb up over bonded ADSL2+ for standard definition. Similarly, VOIP services have been delivered on speeds as slow as 1.5m down by .5m up over ADSL/ATM.
Regarding pair-bonding, when pair-bonding is accomplished, separate cards are not used. Instead, the same card is used, but with different ports on that card. Typically, the ports are side-by-side and consecutive. While there may be a few other minor discrepancies, they mainly concern terminology.
Overall, this video provides a good overview of the concept and technology of DSL, and would be helpful for an average consumer or novelist to gain a better understanding of the technology. However, for an expert in the industry or a field technician, this video may be mildly misleading.
It's worth noting that speeds less than 10mb in most cases do not provide a good quality experience in today's high demand internet. Therefore, it's important to have a good understanding of the capabilities and limitations of DSL technology to make informed decisions when selecting an internet service provider.
@@TelecomTraining I agree with this statement as both FCC regulations and most local state regulations mandate that copper telephone services be maintained and offered in almost all jurisdictions and exchanges. Although many companies are transitioning to VOIP in today's modern telecommunications network infrastructure, it is important to note that the vast majority of rural areas in the United States still do not have access to VOIP and continue to rely on traditional POTS telephone service over legacy copper wires.
Don't worry bro I clicked like but honestly you don't see DSL much anymore here in my town in Minnesota all it is spectrum CenturyLink they can't go over a few megabytes nobody uses it here
It depends on the type of DSL and distance. I can get cable and AT&T internet. I get 100 Mbps down 20 Mbps up from AT&T and it's VDSL2. But they use pair bonding and I'm close to the node (AT&T calls it a VRAD). Went with the VDSL2 because it includes unlimited data and it's 55 bucks a month.
@@sean8102 dude that's not that bad at my work they have arvig and they're so close to the node they can get the same speeds as you that's freaking sweet ✌️
I remember back in '99 when I was 16 in high school. My sister and I were having "phone wars" (shed pick up the phone on a 10M 4h download at 98%, I'd kick her off a call to return the favor). 15,000 and change feet yet 50 feet too far. Convinced everyone to go to a payphone while they qualified it with a phone plugged directly into the NID. Almost didn't work... but they tried a different card. One of the happiest days of my life - 26kb down / 16k up (and she could be on the phone at the same time). "Yeah b*tch!" Looking back, 20 years later though it sucks that they still have some customers I know with this same speed
Thanks for the story. It brought back memories for me. Internet access came a long way with the help of fiber optics and pair bonding.
ADSL2+ is 24Mbps (not 20Mbps).
That is correct. Thank you for the correction.