okay so ive been trying to get Winlink working for probably two weeks now and i feel like i understand maybe 60% of it. got Winlink Express installed and i can connect to the CMS through the internet obviously but the whole point for me is to be able to do it over RF when the internet goes down, which is the emcomm scenario im prepping for.

my understanding is that i need to hit an RMS gateway — which is basically somebody else's node that bridges to the Winlink CMS servers — and my question is do i need to do anything special to register with a specific gateway or does Winlink Express just find the nearest one automatically? i set up a Vara FM session and it connected to a local gateway once but then the next time i tried it connected to a completely different one further away and i got confused about whether my messages were sitting somewhere or if they just live on the CMS regardless of which gateway you use.

also i saw something about setting up your OWN RMS gateway and im kind of interested in that for my county's ARES group but i have no idea what hardware that requires or if i need a separate license or anything. would be running on HF probably, maybe 40m. is that a whole separate rabbit hole

the message routing thing actually clicked for me once somebody explained that the CMS is just a central store — think of it like a mail server sitting up in the cloud. every RMS gateway you connect to, no matter which one, just delivers your message to that same CMS. so it really doesnt matter if you hit a gateway 5 miles away or 50 miles away, your message ends up in the same place either way. you dont register with specific gateways, Winlink Express just scans for whats available on the frequency and connects to whatever responds. the reason you hit a different one the second time was probably just propagation or the closer one was busy or offline.

as for running your own RMS — yes its a whole separate thing but not as scary as it sounds. you run RMS Packet or RMS Relay depending on what mode youre doing, and for HF with Vara HF you'd be running RMS HF. hardware wise you need a radio obviously, a decent TNC or sound card interface, and a machine that stays on. the sysop application is through Winlink.org and they do vet you, its not just open to anyone. for a county ARES deployment it makes a lot of sense to have local infrastructure so youre not depending on somebody elses node staying up.

yeah what he said on the CMS routing, that part tripped me up too at first. one thing worth adding — if you're doing Vara FM make sure the gateway you're hitting is actually running Vara FM and not just Vara HF or packet, the mode has to match. i spent an embarassingly long time one afternoon wondering why i couldnt connect and it turned out the closest gateway on the map had switched to packet only and i just didnt know.

for HF 40m gateway stuff, propagation is gonna be your friend and your enemy depending on time of day. i'd maybe look at 80m too for regional coverage during evening hours, our local ARES group runs both and 80m honestly gets more traffic in our area just because the skip works out better for nearby stations during nets. just something to think about before you commit to a band for the gateway.