Fiber Optic Bandwidth Point to Point
What dedicated point to point fiber optic connections can offer your business.
By: John Shepler
Say you want to link two business locations securely and with medium to high bandwidth. Do you use the Internet for this or…
The Advantage of Private Lines
The Internet has two big advantages: It goes almost everywhere on Earth and access is relatively cheap. Unfortunately, the Public Internet also has a couple of big limitations: Performance is iffy and security is genuine worry.
What’s better? Private lines. Particularly, dedicated point to point private lines. They’re called private because they really are.
Security is ratcheted up orders of magnitude because it’s really hard to hack into something where you have no access. Remember the old spy shows where someone surreptitiously taps into a phone line by connecting directly to the wires? That’s what it takes to get into a private line. You need access to the physical connections themselves. There’s none of this packet snooping on an Internet connection or, worse, over WiFi.
Want to make it even harder to get into your network? Go with fiber optics instead of wires. Even harder? Encrypt your data too. That’ll stop the little snoops in their tracks. Now they’ve got to get physically into your connection somewhere along the line and then break your encryption before they get caught. Good luck with that.
Security is Great. How About Performance?
You really can’t improve over private line performance unless you actually own the network from end to end. That’s actually a possibility. Of course, your LAN is limited to your building or campus. You’ll likely not be able to afford to string wires or trench fiber across town to link separate locations. But you may very well be able to lease dark fiber. If you install your own termination equipment, you pretty much have control over the entire link.
Most of us don’t need to go to that extent. We can lease point to point private line connections at just about any bandwidth we need. As long as you acquire enough bandwidth, network congestion should never be a problem. Packet loss, jitter and latency are minimized with dedicated private lines. There’s no traffic on the link other than yours.
You won’t get that performance consistently on the Internet. The Internet was designed to be robust in the face of line cuts and equipment failure. That’s a great goal, except you may find that your packets take varying routes even between two fixed end points. The packets will almost always get there with TCP/IP… eventually. That’s why real-time applications like VoIP telephone and video conferencing perform much better over private lines.
What Private Line Services are Available?
The two big contenders are SONET and Carrier Ethernet over Fiber. Yes, you can still get T1 lines and they work great. Bandwidth is a limitation, however, T1 is 1.5 Mbps. Bonding T1 lines will get you up to 10 or 12 Mbps, but that’s it. Even at 10 Mbps, fiber is a better deal if available. Fiber bandwidth start at around 10 Mbps and go up to at least 10 Gbps in most areas. For multiple locations or international connections, MPLS networks are an excellent choice.
About SONET Fiber Optic Bandwidth
SONET is the original switched circuit technology used for fiber optic transmissions. It’s implemented on a pair of fibers with a ring topology. That’s for reliability. If one fiber gets cut, the other picks up the load within 50 mSec and keeps going.
SONET is at the core of many networks, especially the legacy telco networks. The most basic service available is OC-3 at 155 Mbps. Other popular levels are OC-12 at 622 Mbps and OC-48 at 2.4 Gbps. Even T-Carrier DS3 service at 45 Mbps that is delivered on coaxial cables travels most of the way multiplexed over OC-3 fiber service.
SONET is a very mature and reliable technology. It’s the way most companies moved into fiber optic bandwidth when copper wireline just couldn’t cut it anymore. Prices have dropped dramatically over the last few years. Even so, there is a more flexible and cost effective solution available today. That is Carrier Ethernet.
Ethernet over Fiber Bandwidth Advantages
If you are wondering why Ethernet over Fiber is taking over the world, you need look no further than you own LAN. Ethernet is the dominant, pretty much universal, protocol used for computer networks. Electronic communications once was analog phone calls. Now the lion’s share of the traffic is digital data and the majority of that is IP video.
Carrier Ethernet, also called Ethernet over Fiber or EoF, is an extension of the LAN standards to make them work over long distances on common carriers. Ethernet has the advantage of directly interfacing to LANs with no protocol conversions required. Unlike SONET, it was designed to be highly scalable. You can get just about any bandwidth you want and upgrade or downgrade it quickly and easily.
Ethernet is also generally less expensive, Mbps per Mbps, than SONET or even the lower speed wireline services. Nearly all businesses can afford 10 Mbps EoF. Most go for 100 Mbps Fast Ethernet. Both GigE and 10 GigE are popular with more demanding applications and larger companies.
How do MPLS Networks Provide Private Lines?
MPLS or Multi-Protocol Label Switching networks are Wide Area Networks that are based on a propriety routing technology called label switching. It’s unique to these networks and hard to hack. That’s why MPLS is also known as MPLS VPN or virtually private networking.
Yes, MPLS is a multi-tenant network and not strictly a private line. However, MPLS networks serve a limited number of paying customers and are carefully managed to ensure that each customer has the resources committed to it at all times. You often even have the advantage or “burst” or use more resources than you have committed to as long as excess capacity is available.
Why MPLS? As large private networks, MPLS offers the opportunity to connect many locations at a lower cost than using multiple private lines. The cost advantage is such that it’s often better to use MPLS rather than dedicated private lines for even two internationally separated locations.
Your Best Bandwidth Option
Which bandwidth solution is right for your business? Before you choose, compare performance commitments and prices for SONET, Ethernet over Fiber and MPLS private line solutions
What’s the Maximum Bandwidth Available?
It’s not likely you’ll ever run out. Gigabit Ethernet service is common. So is 10 Gbps now. In some locations you can get 100 Gbps business bandwidth. That level will become more widely available in the future, as more bandwidth intensive requirements demand it. If you are a really high bandwidth user or have special protocol or security requirements, you might consider wavelength service.Each fiber can carry dozens of wavelengths. Each wavelength transports up to 10 Gbps.
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