house land line <--> converter <-ethernet-> converter <--> extension phone

I'm not looking to go on the external internet or for a VOIP service. I just want the phone to ring in the shop when it rings in the house. I need all the wires in the cat6 cable for the ethernet connection, so can't spare a pair for phone. I've found an alphabet soup of telephone arcana via google that will let you connect your phones from Bangalore to alaska to the home office in New york for thousands of dollars, but I'm hoping for a consumer grade product that will just let me easily have a single extension without a PhD in network technology.

Or should I just pay the extra many hundred bucks for another conduit and cable? (getting one wire through was apparently a hard pull, I don't think I can pull a second in the same 1/2" conduit.)

If not, just break out an unused 10/100 pair from the CAT6 before the terminating connector at each end to use for your POTS. By definition, any VOIP adapter whether LAN or WAN is no longer POTS and will require an active network.

While it's possible to design a low pass/high pass filter to separate the two, the same as is used for DSL delivered over phone lines to the house, it will inherently drop your speed back down to a 10/100 Mbps LAN.

If you have a 10/100 device on one port and Gigabit (1000) devices on other ports, the switch should just set each port speed accordingly.

Occasionally, you may have to manually configure a port if the the auto-sensing can't determine a device's duplex mode and drops to 1/2 duplex on 10/100 devices.

Nice feature with that Netgear switch is the configuration software will also allow you to prioritize video data packets over selected ports which should be perfect for your video editing suite.