Satellite net access is a fairly strange and what can turn out to be expensive (but usually the only) option.
Normal residential satellite broadband is asymmetrical - in other words the upload and download speeds are different. Residential satellite access works by using the satellite for downstream traffic (thats incoming to your computer) and a normal 56kbps
modem for upstream (thats data going out on to the net). The 56kbps
modem is actually slightly misleading in the fact that an ordinary 56kbps
modem only supports 33.6kbps upstream.
So with a basic satellite plan that might mean a 256kbps downstream and 33.6kbps upstream via the
modem. A satellite connection may appear to be "always on" as marketed, but will need to dial the
modem for it to work (as that's how your page requests etc are going out to the world).
Another important consideration of a satellite connection is latency - for simplicity - the lag time between when you request something to happen and when it appears to do something. Satellite will only ever reach the full 256kbps on large file transfers - it really sucks when you're transferring many many small files due to the underlying transfer protocol negotiations (your computer talking back to the net via the
modem). Online gaming will be a thing of dreams still (if you care about that kind of thing).
So... it will be quicker than normal 56k
modem when browsing web pages (incoming), noticeably quicker when downloading MB+ files (incoming), but the normal slowness if you were to send a large email (outgoing).
To get around this bottleneck, some ISP's pair satellite connections with ISDN uplinks (replacing the 56k (33.6kbps upstream)
modem with a 64kb ISDN
modem) instead. This is an additional line rental service above and beyond your fixed line rental fee from helstra or otherwise. ISDN can be thought of as a dedicated high speed line.
bordernet wrote:Important imformation for iSat subsidy subscribers.
Broadband Connect is an internet subsidy program that requires BorderNET to make available speeds of 256k download and 64k upload. although isat can be connected via a standard
modem and phone line, to achieve speeds of 64k and 128k upload available with this service customers are required to change their normal POTS telephone line to an ISDN phone system available from telephone carrier. As ISDN is a telephone system and not a broadband internet product, the costs asscociated are not covered by the Broadband Connect subsidy program.
What they're saying is:
Satellite plan cost + ISDN service cost = monthly cost (but the ISDN component won't be covered under the HiBIS subsidy.
Another important thing to note is that the custom software for the satellite
modem is usually only Windows2000/Windows XP.
For your needs, have you considered a 128kbps/64kbps (upstream/downstream) ISDN connection? Might be what you're after if you don't need to go really fast and only use 1 Gb or so of data a month.
You might want to call (and patiently wait) Telstra and get a line check done. If you've got what's called pair gain (where they make more phone lines without installing more wire) to your end point (the house boundary) ISDN won't work from memory.
You can get two way satellite which removes the
modem uplink completely, but these connections do not come cheaply (the satellite component is much more advanced and finicky)