[SoCoSA/discuss] Two 100BASE-TX over one cable

[gandalf at sonic.net]

This doesn't sound impossible. I'd like to run two different networks over the same cable. We've got a VOIP solution that is proving to be clean bandwidth demanding. I'd like to move it to our already existing backup internet connection. However some of the offices only have a single CAT5 jack. So I was thinking a simple solution would be to transmit both connections on the same cat5 connection to the offices with only one plug and then split them off at both ends. A little custom cabling should do it. Of course I couldn't run gigabit over this setup, but most of our machines don't dabble in that anyway. 

Hmmm, another solution might be to just use the internal network and then separate it in the phone room with the VOIP phones configured on one network and the computers configured on another, something like 198.162.0.1 and 198.162.0.2 with each aDSL connection configured as a separate network. With the main infrastructure running at 100mbps and each internet connection running at 3.0mbps or less there shouldn't be any real fight for bandwidth until the actual gateway. 

I understand that each phone connection uses 64kbps but both upload and download meaning that a 384 u/l internet connection can only theoretically support 6 simultaneous calls and probably only really support 5. 

Questions? Comments? Laughter?


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