CAT5/ethernet/phone line capabilities

Is it possible to have 2 patch cords of cat5 with an RJ11 crimped on end and an RJ45 on the other end, 2 10/100 ethernet NICS in two different systems, a phoneline with 2 jacks(the computers are each setup beside the jacks) and to have all that equipment running a network? If so, how fast would one suspect the data transfers would get, possibly 10mb/sec? Anyone thing someone could get this running close to 100 MB/sec? Or am I just dreaming?

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Originally posted by Shaft:
Is it possible to have 2 patch cords of cat5 with an RJ11 crimped on end and an RJ45 on the other end, 2 10/100 ethernet NICS in two different systems, a phoneline with 2 jacks(the computers are each setup beside the jacks) and to have all that equipment running a network? If so, how fast would one suspect the data transfers would get, possibly 10mb/sec? Anyone thing someone could get this running close to 100 MB/sec? Or am I just dreaming?

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From what I get The standard Phone lines are not capable of 100mbps transmitions so that is probably a no go but 10mbps is possible.

Ethernet uses pins 123&6 out of 8, on an RJ45.
Technicaly an RJ11 is only 2 pins, but I know what you mean (4 or 6 pin plug). With some breaking of protocol you can mess with the pin-outs. Do not, however, unbind pins 1 and 2 or 3 and 6 from a twisted pair. The twists are what differentiate CAT3 from CAT5 ,etc. Higher twist rate usually results in less xtalk and better performance. Your question about througput is impossible to answer as each component has unique characteristics. I simply recommend against it however https://www.sharkyforums.com/images/.../2005/06/5.gif



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- Todd S
Help me, I can't stop playing Diablo II !

You're looking to give yourself a headache aren't you? I would say you won't get anywhere near 100mbps. You might hit 10 but I wouldn't send any important data over a network wired like that.... But that's just me. If you get that thing running by all means post your success story.

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Rome did not create a great empire by having meetings...they did it by
killing all those who opposed them.

Well, nobody will know if this setup will work until somebody tries. I may just be that person. Maybe I'll get 50 mb/sec... and that would be a major triumph.. maybe I would then name myself as the originator of this concept and begin marketing a product line :P I would have to say all that happening is less likely than the outcome of my experiment resulting in 2 mb/sec... but like I said, someone has to try it..

Quote:

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Originally posted by Shaft:
Is it possible to have 2 patch cords of cat5 with an RJ11 crimped on end and an RJ45 on the other end, 2 10/100 ethernet NICS in two different systems, a phoneline with 2 jacks(the computers are each setup beside the jacks) and to have all that equipment running a network? If so, how fast would one suspect the data transfers would get, possibly 10mb/sec? Anyone thing someone could get this running close to 100 MB/sec? Or am I just dreaming?

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Interesting idea (!?) I sold one of my customers the Diamond HomeFree Phoneline networking kit ( Each NIC comes with phone jacks in it instead of RJ45 connectors ) and he is running 4 of these cards all plugged into his house phone line. He reports that the performance is very close to his experience with 10Mbps ethernet LAN. Diamond claims 10Mbps max. with their cards and they do indeed perform very close to this rating.

Now of course you can save the $70 US per card by trying to mess with the pinouts on your own to save the cost of the Diamond cards but I am very curious to know if Ethernet protocol frequencies will screw up your voice line. The Diamond system allows you to share the voice line same as xDSL does. If you can get this to work, talk on the phone at the same time with no distortion, and reliable data transmission above 5Mbps then please post back here !!

However I suspect your patch method will give some headaches. Of course experimenting is always fun and can lead to unexpected triumphs also...Good Luck !!!

The Captain

3com makes a HPNA phone modem that operates at 10Mb.

I would say no talking on phone when network is running and 10Mbps will probably be ok just make sure you keep the pairs together otherwise you'll lose the EMI noise cancelling effects..

$ .02

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- Look for me playing TFC as the mad demoman Adisharr :)