I all for promoting use of a Nortel phone system in a home. If someone is as fascinated about the Nortel product as much as I am....more power to you and enjoy it.
My friend had me install a Nortel Norstar 8x24 in his house for a total of $110. I purchased an older 8x24 Norstar system on ebay for $25, and bought 12 phones for $5 a piece and various other parts and pieces which equaled about $110. You can use only one POTS analog line or up to 8. You can also subscribe to VOIP service from a pure SIP provider such as VOIP.MS and get an Analog terminal adapter and use SIP based phone service on your standard analog lines on the system.
You'll have to know how to punch down a 66 block...do you? It's actually quite simple and keyword the search on google and you'll find an easy way to do this. The punchdown block needs to be a 25-Pair Male Connector prewired to a 66 block that I purchased from Graybar...its almost as expensive as the system....around $50.
The wiring diagram can be referenced below:
You can then either use the Tseries digital phones or M 7XXX series digital phones on your home system. For a homeowner, these are best purchased from a refurbished site or from ebay....type in keywords like Nortel M7310 or Nortel T7208, etc. to find phones. If you have kids, I'd recommend the older M series....as they are rugged. Get the black color as the older beige and grey sets turn yellow.
I am a bit crazy and have a larger BCM system at home....but its amazing how simple the Norstar actually is, so if you feel up for a weekend hobby, you've picked the right one. Its amazing at quite what the party favor you'll now have. You can page people to dinner or tell your wife to bring you a beer over the paging system. People are fascinated about it here in Chicago, I actually have a reporter coming over in about half an hour to interview me about my large Nortel system in my place. HAHA
Any questions?