[opensuse] Re: Top 3 Applications You Wish Existed in Linux
Per Jessen wrote:
Mike McMullin wrote:
I assume that depends on how big city you are, I'm in a city of 200k and the residential is copper wire.
Copper wire does not equal "not digital". In many countries, digital telephone services on copper wire have been quite common since 1994 or thereabouts. I've certainly had ISDN for at least 15 years.
Here, there's more and more high-speed Net. access, WITH phone service on fiber...NOT copper, and therein lies the problem. Fred -- "Where's The Birth Certificate?" -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Fred A. Miller wrote:
Per Jessen wrote:
Mike McMullin wrote:
I assume that depends on how big city you are, I'm in a city of 200k and the residential is copper wire.
Copper wire does not equal "not digital". In many countries, digital telephone services on copper wire have been quite common since 1994 or thereabouts. I've certainly had ISDN for at least 15 years.
Here, there's more and more high-speed Net. access, WITH phone service on fiber...NOT copper, and therein lies the problem.
Fred
Once again, what's required is the proper terminal device. Please describe the situation you're referring to, where it's impossible. Copper or fibre is simply the physical medium. Twisted pair copper has the advantage of providing power to the device. Beyond that, the physical layer is irrelevant. BTW, I've worked in telecom for much of the past 37 years and I have run many systems, over copper & fibre. Incidentally, most of the phone system runs over fibre. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
James Knott wrote:
BTW, I've worked in telecom for much of the past 37 years and I have run many systems, over copper & fibre. Incidentally, most of the phone system runs over fibre.
James, if I were to go out tomorrow and get myself a fibre connection, I would assume it to be for IP-traffic only - it's certainly not available just for telephone traffic :-). Apart from VoIP-devices, I have no idea how I would go about hooking up e.g. my DECT base station. What is the typical CPE equipment required for a hookup with fibre on the "last mile"? (whichever country or telco you have experience with) /Per -- Per Jessen, Zürich (14.4°C) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Per Jessen wrote:
James Knott wrote:
BTW, I've worked in telecom for much of the past 37 years and I have run many systems, over copper & fibre. Incidentally, most of the phone system runs over fibre.
James, if I were to go out tomorrow and get myself a fibre connection, I would assume it to be for IP-traffic only - it's certainly not available just for telephone traffic :-). Apart from VoIP-devices, I have no idea how I would go about hooking up e.g. my DECT base station. What is the typical CPE equipment required for a hookup with fibre on the "last mile"? (whichever country or telco you have experience with)
I have voice over IP phone in my home. The cable company provided me with a box that connects to the cable network on one side and provides up to two POTS phone lines on the other. It is IP back to their office, over coaxial cable and fibre. I can plug in any device that can connect to a regular phone line. Here's a link to a device that can be used to connect standard analog devices to an IP service. http://canadacomputers.com/index.php?do=ShowProduct&cmd=pd&pid=013131&cid=828.480 This is not the device I have here, but it provides similar function. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
James Knott wrote:
Here's a link to a device that can be used to connect standard analog devices to an IP service. http://canadacomputers.com/index.php?do=ShowProduct&cmd=pd&pid=013131&cid=828.480
This is not the device I have here, but it provides similar function.
Here's a bit more info on that device: http://www.cisco.com/en/US/products/ps10026/index.html -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
James Knott wrote: [snip]
BTW, I've worked in telecom for much of the past 37 years and I have run many systems, over copper & fibre. Incidentally, most of the phone system runs over fibre.
Yes, I know that, but Time Warner was INSISTED that it won't work on their digital cable service. I spent a couple of hours trying to get it to work before calling T.W. tech. support. I went "up the ladder" and they all said the same thing, claiming that the modem is analog and therefore won't work. This is NOT an area I have much expertise, Jim, so you obviously know what's going on. Why won't it work?! The modem they furnish is a Touchstone Telephony, FYI. Fred -- "Where's The Birth Certificate?" -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Fred A. Miller wrote:
James Knott wrote:
[snip]
BTW, I've worked in telecom for much of the past 37 years and I have run many systems, over copper & fibre. Incidentally, most of the phone system runs over fibre.
Yes, I know that, but Time Warner was INSISTED that it won't work on their digital cable service. I spent a couple of hours trying to get it to work before calling T.W. tech. support. I went "up the ladder" and they all said the same thing, claiming that the modem is analog and therefore won't work. This is NOT an area I have much expertise, Jim, so you obviously know what's going on. Why won't it work?! The modem they furnish is a Touchstone Telephony, FYI.
Fred
Well, it is an area where I have a fair bit of experience and if they told me that, I'd tell them they were full of it. I'd never heard of that brand so I did a Google search. I don't know if this is your model, but I came up with some info on the TM502G: http://www.arrisi.com/product_catalog/listers/index.asp?id=385. According to the specs, it support T.38 FAX: http://en.wikipedia.org/wiki/T.38_Fax . So it would appear TW is shoveling it. It's more likely they're using compression etc., to minimize bandwidth requirements and in the process clobbering modem signals. According to the specs, your terminal supports G.711, which is good, but it also supports G.729, which is bad for modems etc. If TW uses other than G.711 you will have problems. Other issues include jitter, which can be corrected with buffers or lost packets. Modern modems can sustain some lost data without significant effect, as they use error detection/correction. G.711 uses the full 64 Kb/s for the call. G.729, only 8 Kb/s, which will not support a modem call. That terminal also supports G.726 which, depending on compression level, may support a modem. So the bottom line is it depends on how TW has configured the service. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
James Knott wrote:
Fred A. Miller wrote:
James Knott wrote:
[snip]
BTW, I've worked in telecom for much of the past 37 years and I have run many systems, over copper & fibre. Incidentally, most of the phone system runs over fibre.
Yes, I know that, but Time Warner was INSISTED that it won't work on their digital cable service. I spent a couple of hours trying to get it to work before calling T.W. tech. support. I went "up the ladder" and they all said the same thing, claiming that the modem is analog and therefore won't work. This is NOT an area I have much expertise, Jim, so you obviously know what's going on. Why won't it work?! The modem they furnish is a Touchstone Telephony, FYI.
Fred
Well, it is an area where I have a fair bit of experience and if they told me that, I'd tell them they were full of it.
I'd never heard of that brand so I did a Google search. I don't know if this is your model, but I came up with some info on the TM502G:
Yep.....that's it!
http://www.arrisi.com/product_catalog/listers/index.asp?id=385. According to the specs, it support T.38 FAX: http://en.wikipedia.org/wiki/T.38_Fax . So it would appear TW is shoveling it. It's more likely they're using compression etc., to minimize bandwidth requirements and in the process clobbering modem signals. According to the specs, your terminal supports G.711, which is good, but it also supports G.729, which is bad for modems etc. If TW uses other than G.711 you will have problems. Other issues include jitter, which can be corrected with buffers or lost packets. Modern modems can sustain some lost data without significant effect, as they use error detection/correction. G.711 uses the full 64 Kb/s for the call. G.729, only 8 Kb/s, which will not support a modem call. That terminal also supports G.726 which, depending on compression level, may support a modem. So the bottom line is it depends on how TW has configured the service.
It easier for them to tell me that an analog device won't work on a digital service, hoping I'd not know better, even though I had my suspicions, I didn't "know better." It doesn't sound like it would be an easy thing to get working, and it's not all that important, so I'm not going to worry about it. Thanks, James! Fred -- "Where's The Birth Certificate?" -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Fred A. Miller wrote:
It easier for them to tell me that an analog device won't work on a digital service, hoping I'd not know better, even though I had my suspicions, I didn't "know better." It doesn't sound like it would be an easy thing to get working, and it's not all that important, so I'm not going to worry about it.
Thanks, James!
Fred
I just did a quick test. I hooked up my ThinkPad to an old modem I have here and dialed an ISPs phone number, even though I don't have an account. I was able to get a 44 Kb/s connection and see the logon messages. So, my VoIP service supports dial up modems at a reasonable speed. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
James Knott wrote:
Fred A. Miller wrote:
It easier for them to tell me that an analog device won't work on a digital service, hoping I'd not know better, even though I had my suspicions, I didn't "know better." It doesn't sound like it would be an easy thing to get working, and it's not all that important, so I'm not going to worry about it.
Thanks, James!
Fred
I just did a quick test. I hooked up my ThinkPad to an old modem I have here and dialed an ISPs phone number, even though I don't have an account. I was able to get a 44 Kb/s connection and see the logon messages. So, my VoIP service supports dial up modems at a reasonable speed.
Good deal! I tried several modems here, and several 'puters...one being my Dell laptop...."nada." I'd assume T.W. has the same setup all over the Country for their systems. Fred -- "Where's The Birth Certificate?" -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
participants (3)
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Fred A. Miller -
James Knott -
Per Jessen