Top 10 Questions to Ask Your Satellite Internet Service Provider
you are a company looking for Disaster Recovery Networking Solutions, a First Responder, the connectivity from anywhere at any time need, or you just need broadband Internet connectivity for remote locations, you have probably seen, that satellite can only reliable option. In the middle of a disaster many businesses and first responders can communicate without any kind by the loss of terrestrial infrastructures or the lack of it ever existed to find the first place.
The problem is that most business and emergency service workers do not have a complete understanding of the satellite business and the characteristics of satellite communications, and why should they? Satellite communications is not their profession. In the search for a satellite internet service provider, there are certain questions that you provide before you should get a contract for services that do not satisfy your needs locked:
1) Have you not emptible space segment from satellite?
Satellite operator SES Americom
like, rentable space segment, including Intelsat satellite service providers. There are different levels of protection in different price ranges. Many Services, contracts for pre-emptible space segment to decide because it’s much cheaper and they can increase your profit margins, they may or may not make their end customers. Pre-emptible space segment is the satellite operator to limit access to the satellites for service in case of an undeniable on-board equipment failure, or to make room for a service provider who is ready, which is not payable on emptible premium . make
While large-scale natural disasters such as hurricanes in the Gulf States in 2005, many pre-emptible segments of the satellite space were cleared to make way for government to leave requests for satellite service to other service providers do not have access to. If you are considering contracting party to the service for disaster recovery applications, it is highly recommended that you service that you do not have to before emptible space segment related to contractually guarantee. The service provider should be able to give you the proof of service agreement with operators if you ask. You can pay a little more each month for your service emptible not before, but at least it will be available when you need it most.
2) What is your “over subscription” or “Contention Ratio” is?
Most satellite service providers who provide Internet services are operating systems that use TDMA (Time Division Multiple Access) based systems. A TDMA system is usually through a central hub site, which transmit the remote units in the field command of their data when the hub is ready to receive it controlled. This allows for many remote units on the same disk bandwidth improves the overall efficiency of the system to share. The transmissions from the remote devices are sequenced at a very high rate, appear many times per second, which makes the service be continuous.
However, the more units that are added to the system, the slower the service will be. A true enterprise level operator will never allow their claim ratio 20:1 or substantially 20 terminals per segment exceed the bandwidth. Many operators, the lower grade will be offering services to subscribe to their systems as high as 40, 80, 120:1 or more. Some operators may not be willing to provide this information to their customers. If not tell a service provider, you will claim your money, you could tell us are likely to be high at times other than their means. This will directly affect the quality of service you receive. Enterprise-level operators contention ratios of 20:1 or less is more for their services in accounting, as they have less users for their contracted space segment. But you get what you pay for.
3) What is your system latency, and do your hardware or software include TCP / IP acceleration?
Each IP transport platform is a certain amount of latency that is inherent to the structure of the system. The latency is usually how long it takes for a TCP / IP “ping” a server on the other side of the traffic will be returned and the link to the starting point measured. Satellite systems are involved due to the physics much higher latency than all numbers have terrestrial link. The data is transmitted to the satellite with the speed of light or 186,000 miles per second. The satellite is 22,223 miles above the equator.
a ping to his travel itinerary must be up to the satellite to the earth back to the server until the satellite again and back to the starting point. This is a round trip is about 88,892 miles. If it calculates the speed of light, in a perfect world the round trip takes about 448 milliseconds. If you are in coding delays and processing delays increase the number of add 100-250 milliseconds. In an efficient system should take a tour ping 550-700 milliseconds (225 ms one way in each direction).
Many lower grade systems on the market today actually re-ping times of 1200 milliseconds or more, which is too slow to allow the functionality of certain software applications. Some operators TCP / IP acceleration products have received from their equipment. This can be either a hardware or software solution. Acceleration of TCP / IP does not accelerate the transfer itself, as they are already at the highest possible speed, the speed of light transmitted. The acceleration is by changing the TCP protocol in a way that reaches allow for more efficient transmission over high latency networks such as satellite. Acceleration can significantly improve the speed of loading web pages, so to have it a highly desirable product. Most products are not in a position to accelerate encapsulated data, such as VPN’s, but the system should have that data, however, happen slowly. Make sure to ask whether the system may include an acceleration of product.
4) Are there in your system supports VoIP, VPN, and streaming video transmissions?
If you have specific applications that you intend to operate, you inquire as to whether these applications are supported on the system. VoIP (Voice over IP) telephone connectivity is always a very common need in the field of satellite communications. to ask all types of users of Emergency Services Business Continuity for telephone connectivity. The biggest concerns have most potential users of VoIP over satellite is that the latency is too high for effective voice communications. This is amply demonstrated, not be true. In fact, most mobile phone systems will experience as much or more delay in their systems as VoIP over satellite. Most satellite providers will support these systems, but if the system latency that about 800 milliseconds, you may have trouble exercising a call. Some vendors will sell and VoIP devices. If you buy from them, or on your own you’ll want to choose that make the equipment includes a good voice compression.
most off the shelf VoIP systems that are not designed to be between 40 Kbps and 90 Kbps bandwidth for use with satellite each time to fill completely. If you 128K satellite uplink bandwidth, you can use to buy all your bandwidth with one or two phone calls do not allow for Internet access for your computer. There are compression VoIP systems are available that use for use by satellite, as little as 8 Kbps per call and the call is toll quality were designed. There are even compression systems, allows for a 1544 kbps connection T1/PRI less than 256 Kbps of satellite bandwidth. You want to ask also about access to the PSTN (Public Switched Telephone Network). When the signal arrives at the hub will need to connect your VoIP traffic to a telephone line in connection. Some service providers offer this service for a fee, some will not deliver it ever be so sure, ask
If you need a VPN to run on the system, note that it is not likely to accelerate over the satellite. Acceleration of VPNs can be achieved with external hardware, but it is usually up to the customer, the equipment available. There are some systems, mostly consumer class that does not support VPN’s are asking at all or are there additional fees to be so sure. The same is true for video transmissions from a streaming device or Web cam. Video streams are possible at very bandwidth-intensive applications and most service providers dedicated bandwidth for these applications. Prices for dedicated bandwidth will be much higher than the common pricing relationship, as it consumes 100% of the bandwidth 100% of the time. If you are planning to stream videos multiple locations receive is that you recommended the video stream from the satellite to a server, and so other users get the stream from the server. In this way, there is only one active power from the satellite, where the bandwidth is expensive.
5) Provide CIR CRA or services?
CIR (Committed Information Rate) and CRA (Committed Rate Assignment), various shortcuts with the same meaning. There is satellite bandwidth, which is usually required by the service provider, dedicated if you plan to run high bandwidth applications like video streaming over the satellite. Most enterprise-level service providers offer CIR / CRA packages that most consumers do not level the operator. The prices for these services are significantly higher than shared services relationship, so be prepared. Some providers also require CIR / CRA services for VoIP. Be sure to ask if this is something you can not as some operators have volunteered this information until it is too late.
6) How many public IP addresses do I get?
level public services do not assign static IP addresses to use for you. This is important to understand why they do not support services such as VoIP and VPN. Enterprise-level providers typically enter at least one address, type a few more. Most providers give you a fixed number of messages with your service and charge you if you want additional static IPs. The recommended method is to avoid additional costs by using your own router on the system and natting you their addresses. Some systems are not supported natting so sure to ask if that’s what you need.
7) Do you have a FAP?
FAP or Fair Access Policy is a set of rules that you agree to hold when contracting for their services. In addition, certain restrictions on your service provider. Read this policy very carefully how the providers formulation, which can seriously limit may include: your use. Some service providers will “meter” your throughput on the system. When you reach a certain level of commitment, usually recorded in Kbps or Mbps they can limit your bandwidth to a low level, or cut off your service entirely until the next billing cycle. It is very difficult to measure for your own use, as most people have no idea how many Kbps are sent or received when the store have a website. The FAP is also where the provider of the rules spell out the use of applications such as video streaming and VoIP. Going to be in your interest to this document with a fine comb.
What will be my actual measured speeds?
service you are selling a particular rate plan, have to pass that an uplink or return data rate and downlink data rate, or will. This is normally expressed in a way like “128 x 512″ or sometimes “512 x 128″. The larger number is always the front channel, your downlink as a user. Most vendors will not tell you that the rates include IP overhead. Each Internet system, whether its uses satellite or terrestrial IP protocols that require a certain amount of bandwidth for IP traffic. Because of the overhead you can expect that your actual measured payload speeds will be around 20% lower than what you pay for. Actual speeds may, by a speed test measured from a PC via the satellite link.
If the service provider has its own speed test server in the hub site leads you to a closer examination of the satellite as an Internet-based server speed. The Internet-based servers have achieved too many variables to get accurate results because the data on compounds that are not under your control, or transfer them. Most systems are similar in their IP overhead use, but be aware if you purchase your service. If you do not think the speeds are high enough when you factor in the 20% overhead you might want to consider a higher service level plan.
9) What price plans do you offer?
your search for a service provider you will likely encounter a variety of price plans. Each vendor create pricing structures that meet their business model, and that will give them an advantage over their competitors. For this reason, you may find it difficult to compare prices. All operators offer full-time 24x7x365 service plans. Some also offer plans based on usage, and some are for sale daily or hourly plans. There is even providers, the service for a fixed number of days to sell each month. These plans may be attractive because you will probably not use a system designed for disaster recovery every day of the month, so why should you pay for full-time service? If you have a comparison between the price sellers it is easiest to look at their full rates to determine the costs. But keep in mind that operators base their prices on their costs for the satellite space segment. If they charge less, it may be because they do not have space or not before emptible because they operate with high contention ratios, or both.
10) Do you offer other services such as terrestrial links and co-location?
sure to inquire about the value added services such as collocation space and terrestrial links. Unless you are just buying internet access and have no need for VoIP, streaming or backup, you will likely need these services. Some service providers will provide the connection of the telephone network, some are not. If you need sound you choose will probably contract to be so good. For disaster recovery solutions, it is highly recommended that your dial tone from a safe place, far away from the affected area, come.
In many disaster scenarios of terrestrial connectivity including cellular phones will not be available. It is important that this is taken into account when designing a backup network. Some of the satellite providers to offer secure services and corporate and public server data to the satellite hub location. This is very beneficial to the customers as it provides both off-site storage of valuable data, and easy access to that data via the satellite when it is needed most. A satellite hub at a collocation facility can be a powerful tool and should be highly considered when contracting for satellite services.
This article was written by Bob Exum, a 24-year veteran in the communications and satellite industry. can be reached for comments or questions to Bob Clear Channel Satellite in Englewood, CO 303-925-1708 email@example.com
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