WHAT BROADBAND TECHNOLOGIES ARE AVAILABLE?
Broadband Internet access comes in many flavors. Which ones are available in a precise geographic location will fundamentally depend on the country, infrastructure, and commercial use by the national ISPs (Internet Service Providers).
There are however two important broadband categories: Asymmetric and Symmetric. It is important to determine which one is needed as this decision will affect the price, speed and bandwidth guarantees. Symmetric connectivity is usually a more reliable solution as it brings in an SLA (Service Layer Agreement), and offers better resolution times in case of incidence.
ADSL is considered the most cost effective Internet access available. It is a best-effort solution in terms of bandwidth guarantees and resolution times.
- Asymmetric options: ADSL, ADSL2, ADSL2+, VDSL, VDSL2, 3G/4G
- Symmetric options: SDSL, HDSL, Fiber Optics, Wireless
DO I NEED TO TAKE INTO ACCOUNT ANY REDUNDANCY?
In terms of last mile technology, broadband can be delivered on: Traditional telephone line copper pair, coaxial, optical fiber, Ethernet or wireless.
If you already have a circuit in place and you are looking for a backup, it is recommended to use a different medium. This is done to guarantee that if one line falls the other will be up granting a higher overall reliability.
At Brodynt we work with different local ISPs in each country to guarantee using different POPs (Point Of Presence), or last mile technology, when redundancy comes into play.
SHOULD I BE LOOKING FOR ASYMMETRIC OR SYMMETRIC BROADBAND?
It is important to know if a limited upload speed will be enough. Basing our decision upon prices may turn up badly if the requirements are not properly studied. If we get an ADSL for an upload demanding site, traffic is likely to end up saturating the router. This saturation will make the line appear flapping (unstable latencies). The same will apply for download, so it is important to be certain on the real use and choose accordingly.
Some questions we should ask ourselves are:
- How many employees or services will be using the circuit?
- Will the circuit need to send out a high volume of data?
- With previous questions in mind, is upload speed important?
WHAT SPEED SHOULD I AIM FOR?
Broadband speeds are always given theoretically at a commercial level. It is necessary to check it individually to know what speeds are available in each case.
- ADSL download max: 8Mb; ADSL upload max: 1Mb
- ADSL2 download max: 12Mb ADSL2 upload max: 1,4Mb
- ADSL2+ download max: 24Mb ADSL2+ upload max: 1,4Mb
- VDSL download max: 55Mb VDSL upload max: 3Mb
- VDSL2 download max: 100Mb VDSL2 upload max: 30Mb
- 3G/4G download max: 100Mb 3G/4G upload max: 50M
- SDSL download max: 1,5Mb SDSL upload max: 1,5Mb
- HDSL download max: 4Mb HDSL upload max: 4Mb
- Fiber Optics download: 100Mb Fiber Optics upload: 100Mb
- Wireless download max: 50Mb Wireless upload max: 50Mb
- To check availabilities, we will need to know the address and analogical number such as a fax or telephone number. This is needed to determine the distance from the DSLAM to the customer’s premises.
If you want to know what speeds are available in any site around the world please contact our sales team firstname.lastname@example.org.
WHAT ARE CONTENTION RATIOS AND BANDWIDTH GUARANTEES?
There had to be a reason why broadband Internet access is more affordable than an uncontended, 100% guaranteed, Internet access like a T1 (USA) or E1 (Europe). And this reason is overbooking. As the usual state of a circuit is normally not transmitting what operators do is overbooking their infrastructure. As airlines do with their flights. It is taken for granted that all users will never transmit all at once.
When you send a broadband quote request it is important that you find out its contention ratio and guarantees.
Contention ratio: A residential ADSL circuit would have a contention ratio of usually 1:50. This meaning that the circuit will be highly overbooked. When most users are online, when they get home after work, you will find a substantial decrease on the circuit speed. As it is shared among so many users prices are really cheap at the expense of speed. Thankfully we don’t work with residential ADSLs!
Business ADSLs are usually within the range of 1:10 and 1:20. Yes, this and the fixed IP is to be considered as two basic explanations for the price difference from residential ADSLs.
So contention ratio will affect the price as it affects the speed guarantees. If you get ADSL 4Mb/1M with a 1:10 contention ratio you are certain that, in a worst case, the circuit will be overbooked with up to 10 users. Users should end up sharing the bandwidth proportionally when at full speed. In this example you may conclude that the guaranteed bandwidth for your line, also called MCR (Minimum Committed Rate), will be of a 10%. 400Kb (or 0,4Mb) download and 100Kb (or 0,1Mb).
Bandwidth guarantees for ADSLs are usually so low that they are called best-effort. This meaning that they do what they can… so you should not expect more!
Bandwidth Guarantee: Other circuits can be quoted in terms of bandwidth guarantees. For example the SHDSL 2Mb/2Mb and SHDSL 4Mb/4Mb that Brodynt offers in Spain has 80% guarantees. So SHDSL 2Mb has 1,6Mb of symmetric guaranteed bandwidth and SHDSL 4Mb has 3,2Mb.
This is often noted as follows:
- SHDSL 2M/2M (1,6M/1,6M)
- SHDSL 4M/4M (3,2M/3,2M)
IN CASE OF ADSL, SHOULD IT INCLUDE THE PSTN LINE?
All circuits usually include the local loop, meaning the physical circuit from the customer premises to the POP. It will be in the POP where the local operator provides the Internet port where your traffic will finally access the public Internet.
However in the case of ADSL there are two options possible.
- Brodynt includes the required PSTN (Public Switched Telephone Network) altogether with the ADSL service.
- The customer has an existing PSTN lines that can be used for us to install the ADSL service.
The PSTN, if needed, will add have an extra cost to the ADSL service. So you will have to find out if you need it or not. Also take into account that it is not possible to bundle the PSTN with all ADSLs, it will depend on the country and sometimes even on the region.
DO I NEED TO CHECK AVAILABILITIES?
As explained before, technologies depend on infrastructure deployed and available at the customer’s premises. Speed depends on distance. And distance can also determine if a technology is possible or not.
For example a site may have copper pair available. However when we check availabilities, if it is further than 5Km from the POP, ADSL will not be possible.
If you just need some estimates we recommend to ask for quicker budgetary prices. If budgetary is good we may then check availabilities.
SHOULD I ASK FOR 1 FIXED IP RANGE, 4 IP RANGE OR MORE?
Brodynt always provides at least 1 fixed IP assigned to the circuit equipment. We do this to monitor all our global circuits 24×7. If you intend to connect a VPN router, or Firewall, you will have to ask for a 4 IP range. This would include 2 usable IPs, with 1IP being free to use. As there is some confusion with nomenclature, we recommend you to use the following depending on how many IPs you need:
- 1 IP range (/32 IP address)
- 4 IP range (/30 IP address, 2 usable IPs, at least 1 free to use)
- 8 IP range (/29 IP address, 6 usables IPs, at least 5 free to use)
The most common requirement for Broadband VPN is a 4 IP range. The standard solution includes a Cisco 800 Series VPN equipment connected behind the circuit modem-router. First usable fixed IP is assigned to the circuit router. Second usable fixed IP is assigned to the Cisco VPN equipment.
In most countries getting a specific IP range will affect the price, so be sure on how many IPs you will need. Also consider that some solutions will not allow more than 1 IP range or 4 IP range.
WHAT IS THE USUAL DELIVERY TIME?
Delivery times will depend on the country, access technology and exact location. However it is common to do installations in about 4 weeks time. If you have any important due date this is something you should definitely ask to be sure the circuit gets installed on time.
WHAT IS BROADBAND VPN?
If the circuit is going to be used just as a pure internet access then there is nothing much to consider here. However, if it will be used for a VPN then there are several points you should take into account.
Will you be responsible for your own VPN equipment? In that case just make sure you get all LAN technical detail from the circuit modem-router and a free usable fixed IP for your VPN equipment.
Do you need Brodynt Global Services to provide the VPN equipment? In that case we can install it onsite in about 180 countries
It is important to know what type of configuration and management you will be needing. The standard procedure for Brodynt is providing the Cisco VPN router with an official Cisco SMARTnet support. We will send an engineer to connect the VPN router onsite. Once its IP is up we can connect to the equipment remotely via Telnet or SSH. We may then hand you the login and password details for your remote VPN configuration and management. You can keep full control and change the login details if desired. Contact our sales team if you require a different approach.
WHAT IS THE DIFFERENCE BETWEEN BROADBAND VPN AND MPLS OR POINT TO POINT?
Broadband VPN solutions are widely used for three purposes:
- Connecting smaller remote offices to an existing MPLS network.
- Backing up existing MPLS network.
- Having a low-cost alternative to MPLS.
But why is Broadband VPN so cost-effective in comparison to MPLS or point to point circuits?:
- An MPLS or point to point line will have a reserved bandwidth from point A to point Z. On the other hand, Broadband VPN will create a tunnel though the public overbooked Internet.
- There is no one to pay once the traffic gets into the Internet. You are basically paying for a standard Internet access, with a VPN router. Once the VPN traffic enters the Internet it will have no bandwidth guarantees as the equipment it will go though is overbooked (which is the essence of the Internet). Even when going through the public Internet, your traffic will still be safe as it will be encapsulated with IPsec (Internet Protocol Security).What to consider:
- Number of employees on a site and the circuit’s real use. We understand it may no be reasonable for a company to spend thousands per month on a remote delegation with only 2-3 employees. In those cases Broaband VPN is an excellent alternative.
- Is your MPLS backed up by a cost effective redundant solution? Have you had any downtimes during the last 12 months due to an unexpected incidence? We recommend to backup MPLS solution to substantially increase the overall reliability.
- Latency: It is important to determine the maximum latencies accepted by the software to be used. This is the biggest difference between Broadband VPN and MPLS. Much more expensive MPLS or point to point circuits will have low latencies. A low latency means that the time for a packet to travel will be fast. Broadband VPN latencies will always be a bit higher. For services where having extremely low latencies is not important then Broadband VPN should be an option to consider.