SatSig topic:

linkstar DVB-S2 RX TX problem

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Mar 9^th, 2008 at 12:58pm

Dear Eric,

I have two new linkstar DVB-S2A modems. I intend to use these modem for C Band satellite access.

The satellite I my dish is Pointing is IS10 (AMC12)
The provider of the service is fobsky.
The problem is i cant get a lock with the modem (DVB-S2) but I can with the older modems
I can telnet into the modem by using the default IP but can't ping the modem.
I can really say if the modem system is can of lock to a particular provider.

If this is so then how can I set these modem free. The modem is manufactured 2008.

Need Help

Mar 9^th, 2008 at 1:18pm

That is strange. What is the IP of the modem?
What is the PC gateway, subnet mask and IP of the PC?

If you can telnet to the modem what configuration text line have you been told to type in by fobsky?.
Have they given you any special line for DVB-S2 modems ? Ask fobsky for an up to date installation manual with any special requirements for the S2 modem.
Reading back from the configuration screens, does it look like you have missed inputting anything ?

Best regards, Eric.

Apr 29^th, 2008 at 6:32pm

Problem solved

I set the modem to DVB 0

May 5^th, 2008 at 9:58am

hi dear eric sunny naidoo south africa
we have a client that is using linkstar modem no model no on modem. pick uo internet on teachers computer only cannot see other 10 users. network used is rj45 and peer to peer using windows xp service pack 2.
we would like all the computers to see internet.
thank u
sunny naidoo
south frica
mail id: srinimunaga@yahoo.co.in
mail id: tsskp1@gmail.com

May 5^th, 2008 at 11:10am

There are three solutions to this I know:

1. Passive hub. This device effectively parallels all the ethernet cables together. All PCs see everything. No management. To work, your LinkStar service provider must have given you enough IP addresses for the PCs to be connected. Hubs are sometimes unsatisfactory due to PC interfaces having different speeds (10 v 100) with auto-negotiations occurring.

2. Switch. Similar to hub above but traffic on each cable is particular to the PC connected. Possibility of management, e.g. Cisco switch. To work, your LinkStar service provider must have given you enough IP addresses for PCs to be connected.

3. Router. You only need one IP address from the LinkStar and you may invent as many private IP addresses as you want for your LAN. Many varieties of router are available, often with a mixture of etherent sockets and wireless access for multiple PCs on your LAN. A router is probably the least cost solution as so many millions of them are sold for domestic and small office solutions.

If you know the subnet mask of your LinkStar Ethernet gateway port, the number of PCs you can connect (without a router) are:
255.255.255.252 PCs connected = 1
255.255.255.248 PCs connected = 5
255.255.255.240 PCs connected = 13
255.255.255.224 PCs connected = 29

If you wonder about these strange numbers, note that in each case 3 extra IPs are not available for PC use, as they are used for the subnet name, the subnet gateway (LinkStar modem socket) and the subnet multicast IP address.

Read about routers before you buy one as traffic management will soon become your big problem. You need to be able to monitor and manage your users to avoid abuse and congestion.

I hope others will make their suggestions here also.

Best regards, Eric.