Advertisment: Broadband via satellite
Advertisment: Planet Earth rotating animation

www.satsig.net

Satellite Internet Forum.

Welcome, Guest.        Forum rules.
      Home            Login            Register          
1  VSAT technology and installation / Hub and VSAT satellite equipment for sale and wanted / New AMKOM 40 Watt Extended Ku BUC w/PS and Bias-T - $7500.00
 on: May 2nd, 2022 at 4:52pm 
Started by PWC | Post by PWC  
3 new ones available with test sheets and accessories and connectors for power and M&C.  Each also has an external power supply and bias-T, rack mounted with coax cables.  Free shipping and packed well.  Buy all three for $20,000.00

2  Service Providers / Satellite Connection in Africa / Re: Looking For ISP For Ku Band Newtec on E70B - Africa Coverage
 on: Apr 25th, 2022 at 10:37pm 
Started by AHMED IDRISS | Post by AHMED IDRISS  
SatADSL_CCO wrote on Apr 24th, 2022 at 5:10pm:
Hi Ahmed,
Please contact SatADSL: we have all what you need
sales@satADSL.net
Thank you


Thank you very much. I am in contact with you!
Now the admin can close this topic Roll Eyes Grin

3  Service Providers / Satellite Connection in Africa / Re: Looking For ISP For Ku Band Newtec on E70B - Africa Coverage
 on: Apr 24th, 2022 at 5:10pm 
Started by AHMED IDRISS | Post by SatADSL_CCO  
Hi Ahmed,
Please contact SatADSL: we have all what you need
sales@satADSL.net
Thank you

4  Anything else / General and other topics / ACM Adaptive Coding and Modulation
 on: Apr 22nd, 2022 at 11:14am 
Started by Admin1 | Post by Admin1  
Adaptive Coding and Modulation (ACM)

Some advice..

In ACM the symbol rate normally remains constant and therefore the satellite bandwidth required remains constant.

The modulation method BPSK, QPSK, 8QAM, 16QAM etc and FEC rate varies so that the best customer bit rate is obtained according to the current weather (rain fade etc).  The throughput varies according to the weather.

If you are designing a system and want to get the highest throughput per unit bandwidth then you need the highest quality link. You need to choose a satellite with a high power, a small coverage area spot beam (with high G/T on the uplink), adjustable gain on the satellite transponder and a large receive earth station at the other end.  You might use 16QAM modulation and FEC=0.583. This gives about 3.5 bits per Hz.

Read: http://www.comtechefdata.com/files/articles_papers/wp-cdm625_acm_white_paper.pdf

If you choose a specific fixed bandwidth and then use ACM, you will get the best bit rate under clear sky conditions, with perfect dish pointing etc. As the weather deteriorates the customer bit rate will go down.  You need the latest modems, such as CDM625 with ACM options enabled.

If you don't have ACM and set up a lower bit rate in clear sky by setting say a 3 dB link margin and presetting a fixed modulation and coding, your system will work fine in clear sky and also work fine in some rain but will fail when the degradation is worse than 3 dB.  Old style modems, with a choice of several fixed MODCODs,  are suitable. Most older satellite links work like this and all have a link margin of several dBs, to cope with rain fades.

If you don't have ACM and actually adjust for the best bit rate in clear sky by presetting the highest possible modulation and coding your system will work fine only in clear sky, but will fail as soon as it rains etc.  Old style modems, with a choice of several fixed MODCODs,  are suitable.  During days when it is raining you will get no service.I don't know anyone who operates like this as most customers want 24/7 service.

Best regards, Eric

5  Service Providers / Satellite Connection in Africa / Looking For ISP For Ku Band Newtec on E70B - Africa Coverage
 on: Apr 14th, 2022 at 8:16pm 
Started by AHMED IDRISS | Post by AHMED IDRISS  
I am looking for ISPs that provides Ku band connection on E70B satellite on Africa footprints Coverage, I need to test the service, our plan is to install 50 terminals but we need to have a free zone option available.
Modems: MDM2200 & MDM2210
iLNBs: ILB2140 & ILB2141

6  Service Providers / TooWay and KA-SAT satellite / Re: Tooway KA-SAT outage Ukraine Feb 2022
 on: Apr 9th, 2022 at 4:07pm 
Started by Admin1 | Post by Admin1  
9 April 2022: A SkyDSL customer in Germany affected with same symptoms on night of 23/24 March 2022.  All 4 front panel LEDs OFF and internal Green LED ON.

...
Surfbeam modem: All front panel LEDs OFF.

...
Surfbeam modem: Internal Green LED ON.

Beam 32. Gateway GW2, Rambouillet, France.

Follow up:  SkyDSL was informed, the affected Modem was RMA returned to SkyDSL and a replacement modem has been sent to and received by the customer.

Admin comment: I will add more details here once the replacement modem is actually working properly and service has been restored.

The new modem has Power LED on, blue, the RX LED is blinking slow in blue since 24 hours, no internet. Sky DSL is almost impossible to be reached. It is not clear if the TX and NETWORK LEDs are dim and also slightly blinking slow.

...
Surfbeam modem: Are the lower LEDs flashing or not ?

Admin:  Once the Power is ON the modem will start trying to find the best downlink carrier. This involves tuning systematically to multiple likely frequencies and also switching polarisations in case you are in the border area of 2 or 3 adjacent beam coverages. During this time the RX will flash slow (1 sec) and the TX will be OFF.

If your replacement modem won't lock to any downlink carrier contact SkyDSL as your modem may not have been prepared with carrier frequencies for the KaSAT network.

Once locked to the best downlink carrier the RX will go double rate fast flashing (0.5 sec) and the TX will flash from time to time as it attempts to range the satellite and register with the network management centre.

Once ranging and registration are complete the RX will go solid ON and TX will flash when transmitting traffic.

14th April 2022:  Finally fixed and service restored.

7  Service Providers / Maritime and Mobile satellite communications / For sale: Thrane IP Handset and Skipper 150 Below Deck Unit
 on: Apr 7th, 2022 at 6:31pm 
Started by Admin1 | Post by Admin1  
For sale: Thrane IP Handset Wireless TT-3672B and Skipper 150 Below Deck Unit BDU FBB 150

...

Thrane IP Handset Wireless TT-3672B
included Cradle for Handset TT-3674B
More details and price: https://www.ebay.com/itm/184036251126

Skipper 150 Below Deck Unit BDU FBB 150
Used, Excellent Condition
More details and price: https://www.ebay.com/itm/184037614556

All from SatBBC Inc., 1140 Holland Drive , Boca Raton, FL 33487, United States.
Email: sales@satbbc.com

8  Service Providers / TooWay and KA-SAT satellite / Acid Rain and Tooway KA-SAT outage Ukraine Feb 2022
 on: Apr 3rd, 2022 at 10:42am 
Started by Admin1 | Post by Admin1  
SentinelLabs has been investigating the KA-SAT/Tooway outage.

SentinelLabs is an open venue where investigators into cyber crime share their findings and collabarate.

Regarding KA-SAT and Tooway, their conclusion is that it is likely that the Surfbeam modems had their software corrupted by a "wiper" program previously downloaded from the network management centre.

...
Ref: https://www.reversemode.com/2022/03/viasat-incident-from-speculation-to.html

When this malware "wiper" program was run it erased the intended code in the modem and replaced the code with spurious data, as shown on the left above. The malware code is called "Acid Rain" and the headline "AcidRain - A Modem Wiper Rains Down on Europe" seems most appropriate, although it is no laughing matter. The result and implications of this attack are very serious and all networks involving customer modems and routers, whether IOT devices, ADSL modems, cable modems or satellite modem/routers need to be on thier guard.

The SentinalLabs report is here and I strongly recommend you to read and download:
https://www.sentinelone.com/labs/acidrain-a-modem-wiper-rains-down-on-europe/

There are a number of references, which I list below for further reading and background information.

https://www.wired.com/story/viasat-internet-hack-ukraine-russia/

https://www.cisa.gov/uscert/ncas/alerts/aa22-076a

https://media.defense.gov/2022/Jan/25/2002927101/-1/-1/0/CSA_PROTECTING_VSAT_COM...

https://www.airforcemag.com/hackers-attacked-satellite-terminals-through-managem...

https://nps.edu/documents/104517539/104522593/RELIEF12-4_QLR.pdf/9cc03d09-9af4-4...

https://www.reuters.com/business/media-telecom/exclusive-hackers-who-crippled-vi...

https://www.viasat.com/about/newsroom/blog/ka-sat-network-cyber-attack-overview/

https://blog.talosintelligence.com/2018/05/VPNFilter.html

https://blog.talosintelligence.com/2018/06/vpnfilter-update.html?m=1

https://blog.talosintelligence.com/2018/09/vpnfilter-part-3.html

https://www.ncsc.gov.uk/files/Cyclops-Blink-Malware-Analysis-Report.pdf

https://www.trendmicro.com/en_us/research/21/a/vpnfilter-two-years-later-routers...

https://www.cisa.gov/uscert/ncas/alerts/aa22-054a

9  Service Providers / TooWay and KA-SAT satellite / Explanation of KA-SAT attack and restoration.
 on: Apr 2nd, 2022 at 1:35pm 
Started by Admin1 | Post by Admin1  
News from Viasat: 30 March 2022. Explanation of KA-SAT attack and restoration.

Viasat have provided an explanation about what happened and how Tooway resellers are to be able to help customers restore service.

Full details:  https://www.viasat.com/about/newsroom/blog/ka-sat-network-cyber-attack-overview/

Briefly, hackers got on-line access into the network management computer system and caused it to send out data in order to corrupt Tooway customer modems so that they no longer connected themselves to the network. The modems were not permantly damaged and appear recoverable by reprogramming.
 
Meanwhile, Viasat has already shipped tens of thousands of replacement modems to distributors and is ready to ship additional modems as needed.

More technical investigations by enthusiasts:
https://www.reversemode.com/2022/03/viasat-incident-from-speculation-to.html

My recommendation: If you were affected, get in touch with your reseller and ask for replacemrnt modem.

10  Service Providers / TooWay and KA-SAT satellite / Memory dump from corrupted Surfbeam2 modem
 on: Mar 31st, 2022 at 5:06pm 
Started by Admin1 | Post by Admin1  
Update 31 March 2022.

Ruben Santamarta has managed to dump the flash memory from a corrupted Surfbeam2 modem and compared it with a clean, unaffected version.

More details and comments here:

https://www.linkedin.com/posts/rubensantamarta_i-eventually-had-access-to-one-of...