Whomever told you GCI uses PCS doesn't know what they're talking about. PCS is a CDMA technology that Sprint used to use (hence their old name of Sprint PCS). GCI's network is a GSM network (one that originally shared AT&T's towers in Alaska). Even the old Alaska Digitel network (which is a CDMA network GCI now operates) has nothing to do with PCS. Also, it was GCI that built cell towers all along the Parks Highway from Wasilla to Fairbanks, not ATT.
The microwave system in SW Alaska is part of TERRA SW, and GCI is looking to build another system called TERRA NW that would cover Barrow and other areas. GCI actually has run fiber from Anchorage to Bethel as a hard link for TERRA. The plan is to have multiple redundant rings (so a break somewhere does not disrupt) traffic throughout the Alaska interior, just as they have done with their fiber running to Seattle (multiple routes through Prince William Sound).
One other thing: Verizon is coming to Alaska in the next year or two. They bought a bunch of spectrum from a local company that was just sitting on it, and are currently building their Alaska data center right across the street from ACS headquarters. ACS has seen a massive drop in wireless customers in the last couple of years, so I'm not sure they even have the financial means to try to expand their services beyond the larger urban areas.
No. Just no. You are horribly misinformed. PCS is the 1900mhz band. Currently in the US, it has GSM, HSPA+, CDMA, EVDO, and LTE deployed on various parts of it in various markets. Sprint still uses the the 1900mhz band exclusively for their CDMA network. They used to call it PCS because the CLR spectrum was deployed on analog while PCS was digital, but now that it's all digital, PCS is a disadvantage, since its propagation is poor compared to CLR. T-Mobile is GSM and uses PCS, AT&T relies on PCS heavily to boost capacity, as does Verizon, and in some markets, Verizon or AT&T don't own cellular (850mhz) spectrum, so they use PCS exclusively.
The CLR blocks in Alaska are AT&T (ex CellularONE), and ACS. GCI does not own one, so they must be using PCS. Not sure if ACS or AT&T also own PCS blocks or not. There are something like 6 PCS blocks in every market, but only two CLR blocks.
That's fine if GCI built the towers up the highway, but AT&T has EDGE sites on them, GCI has GSM only. AT&T must be leasing from GCI, that's a pretty common phenomenon, as weird as it seems. Around here, T-Mobile has some towers that they lease decks to the other carriers.
ACS has great coverage, it's just a matter of subs and sustainability. My guess is Verizon will buy them out. Verizon also has the 700mhz upper-C license up there.
Terra SW was what I was referring to, their fiber ends in Lovelock, and then switches to microwave to get farther north. It then will eventually go back to fiber in Shaktoolik, where it continues to Nome, and then goes back to microwave to serve some of the local communities. Sounds like a great newtork overall, even if it has a zillion hops in it. Hopefully they can keep the latency reasonable in going from fiber to microwave to fiber to microwave on some of the extreme ends of the newtork.
Terra NW is the fiber portion up to Nome and the surrounding villages, it has nothing to do with Barrow. AFAIK, there is no plan to get internet access to barrow. There would have to be several extremely remote microwave repeater sites, if not an underwater fiber cable, either of which would be big $$$. Unfortunately, that's how AT&T thinks, not in what can be done like they used to (national microwave relay and AT&T Long Lines).
There is a huge loop in the middle of it, but the link to the outside world, and Terra NW to Nome are not redundant, at least not site wise. Maybe they have two different systems with independent power systems running in parallel on the same towers for some level of redundancy.
I'm wondering if GCI will put HSPA+ up in the villages that have Terra, and if they will let AT&T roam at 21mbps....