Home page of Satellite Internet and Information

Satellite Internet Forum.

Welcome, Guest.
Welcome to this satellite broadband discussion forum. Wherever you are and whatever your problem we are here to help each other. Connecting to the internet via satellite is not always easy but is critically important to those in remote places or with poor terrestrial infrastructure. Both service providers and customers are encouraged to contribute. Register at the bottom of the forum home page if you wish to contribute or ask question. Read the Forum rules.
      Satellite Internet Forum : Home Page          
Pages: 1

II+ to iNfiniti via SCPC

(Read 1956 times)
Ex Member
Ex Member


May 12th, 2008 at 9:09am  
Hi All,

Does anyone know, or tried, to get a II+ talking to an iNfiniti via SCPC.  I am about to have play to see if I can do it but was interested to know if anyone has tried.
Bear in mind the II+ will be running iDS5.0.5 and the iNfiniti iDS7.0.2 for example.

Thanks ;.)

Lukio
Back to top
 
 
IP Logged
 
Ex Member
Ex Member


Reply #1 - May 12th, 2008 at 2:31pm  
I honestly don't know if this will work.  I believe it should, but I'm not sure I'd recommend it.

First, you are supposed to have the 4200 version which includes licensing for iSCPC.  If you don't have it, the cost is such that you can buy a new 5100 for less than the upgrade. 

Second, the PPS (packet per second) forwarding capability of the NM2+ is very limited.  The Infiniti doesn't have a lot of horsepower either.  Don't try to use this on a large circuit or you'll waste your money as the modems won't be able to fill the pipe. VoIP or other small-packet traffic will greatly reduce the size of the supported circuit.

You will have to go with the least common denominator in terms of modulation and frame size.  I could be wrong, but I don't think the NM2 supports 8PSK or 7/8 framing. 

This is probably worth a try for a small circuit (512 x 256) or something like that.  If you plan to put it on a circuit with over 1Mbps, I'd strongly recommend using a pair of Infinitis.  In any case, depending on the traffic profiles you don't want to use this solution on large multimegabit circuits unless you have a way to confirm that all the packets will be large.

Let us know how it works...
Back to top
 
 
IP Logged
 
Ex Member
Ex Member


Reply #2 - May 12th, 2008 at 9:51pm  
Hey thanks for the reply.  Data rates over this link are very small anyway - 64Kbps so I shouldn't need to be concerned about data loss.
It's more of an experiment really - in theory I think this should work so will give it a whirl and see what happens.  I know the standard II+ aren't great at SCPC due to them not having the ovenized oscillator.
Anyway, I'll have a crack and see what happens....will let you know ;.)

Lukio.
Back to top
 
 
IP Logged
 
Ex Member
Ex Member


Reply #3 - May 14th, 2008 at 3:11pm  
One other consideration, I think the low supported iSCPC speed at least for Infiniti is 128 Kbps. 

Make sure you use a PLL LNB.

Back to top
 
 
IP Logged
 
Pages: 1