Phone Line on cat 5 10-Base-T Ethernet?

I'm a little bit new to the actual specifications of hardware operations so this is something I wanted to ask because it seems to be the case according to what I've read. (I've been primarily a software person myself.)

I understand that standard 4-pair wire (cat 5) running data at 10mbps does not use the blue/white and blue pair (wires 4 and 5), which is typically the standard color for running a phone line along an ethernet wire.

If this is correct, is it possible to run a standard analog phone line over cat 5 ethernet sold in hardware or computer stores, simply by connecting to the blue & blue/white pair and using that? Since the wire is typically twisted pairs, I had the impression this was possible without crosstalk between either the ethernet and the phone line.

Also, if the network cards being used are of the typical 10/100 type that sell these days for $20 or less, or are included on the motherboard of the user's PC, does that mean you can't do this because

100mbps will use all 4 pairs, or is it that you can run 100mbps service over the other pairs and it won't really use the inner blue-blue/white pair?

The things I have read indicate there are two types of 100mbps service, 100Base-T, 100Base-T4 and 100Base-T8, where 100base-T8 uses all of the wires in a 4-pair ethernet cable, and 100-Base-T4 uses only two of the pairs. How would I know which is being used in ordinary connections?

This also seems to imply that the other pair (wires 7 & 8) is also available for use as phone service, conceivably implying you can run

100mbps ethernet and two analog phone lines on the same 4-pair cable without problems or interference. I'd like to know if this is the case.

Paul Robinson

Reply to
Loading thread data ... Forums website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.