Gigabit Ethernet Port Scales WAN Bandwidth

When you are ready to make the move from copper to fiber bandwidth levels or upgrading an OC-3 SONET service, you are faced with a choice. What level of bandwidth do you install?

Why not give yourself flexibility for the future and the opportunity to pay only for what you need right now? This is what a Ethernet port strategy can do for you.

Scalability is a new idea in business telecom services. When you install a T1 line, it requires a very specific T1 interface that include a CSU/DSU circuit unique to the T1 line specifications. Upgrade to a T3 line (DS3 bandwidth) and you’ll find that you can’t just plug that T3 into your T1 router. The interface is completely different. Even the connecting cable is different. With DS3 you are looking at a pair of coaxial BNC connectors that don’t support any other service. Now, make yet another move on up to OC-3 service. Your router interfaces for T1 and T3 are no good. You need a fiber input to your router.

It doesn’t get any better when you start moving up the fiber optic hierarchy. You can’t just plug OC-12 or OC-48 into an OC-3 port and have everything spring to life. They are different services requiring modifications. You’ll likely need a new interface card and programming changes to your router. If you have a managed router, that probably means a truck roll to your premises to swap out the CPE (Customer Premises Equipment).

In the back of your mind, you must suspect it doesn’t have to be this way. Those new PCs have NICs (Network Interface Cards) labeled 10/100/1000 Mbps. That means that you can plug them into any LAN running at up to 1 Gbps and they’ll work just find. Even the connector takes the same RJ-45 patch cord. Wouldn’t that approach be far superior for WAN connections too?

This is the beauty of Carrier Ethernet, which includes Metro Ethernet, MPLS network access and long haul point to point connections. Ethernet beyond the LAN has been designed to be as flexible as Ethernet on the LAN.

One of Ethernet’s best features as a bandwidth service is ease of scaling. If you are running 50 Mbps service and find your needs have increased so that you now need 100 Mbps, you can just call up your service provider and request an upgrade. In a matter of hours or a day or two at the most, your WAN network speed will double. In that time, no one has knocked on the door with a new router under their arm. In fact, you haven’t seen anyone from the service provider. It was all done over the phone.

There is a trick to making this work. The magic is all in the installed Ethernet port. When you order Ethernet service, make sure that you have a port installed that will support the highest bandwidth you reasonably expect to be ordering down the road. Most ports are the standard Ethernet speeds of 10 Mbps, 100 Mbps and 1,000 Mbps. It’s also possible to get a 10,000 Mbps or 10 GigE port with a suitably fast managed router if your needs are that high.

With Ethernet over Copper, you are probably looking at a 100 Mbps Ethernet port at most. Be sure you know just what your maximum speed will be, because EoC is distance limited and requires more copper pairs as speed increases. Ask what bandwidth your installation will support compared to what you are ordering initially.

With Ethernet over Fiber, it likely makes sense to install a Gigabit Ethernet port. The fiber itself has more capacity that you are ever likely to employ. The speed of the port will be the limiting factor, along with the capability of the carrier’s equipment that feeds that port. Once again, it is smart to plan for the future but buy for today. Get the bandwidth you need now, but be sure that the system is engineered to allow for fast and easy upgrades as you need them. That will be especially handy if you get hit with a sudden increase in traffic or a need to support massive amounts of video or enormous file transfers that you didn’t anticipate.

Are you ready for a bandwidth upgrade, but unsure of what commitment to make? Give yourself some breathing room with a Gigabit Ethernet port and the ability to scale up your bandwidth as needed. Get prices and availability of Ethernet ports and line speeds now.

Pricing Slashed For Michigan 100 Mbps Business Internet

Businesses in Michigan, like businesses everywhere, are hurting for bandwidth. Between the increased use of video, business automation, and everything moving to the cloud, those aging T1 lines are starting to grind to a halt under the load. Bonded T1 will only take you so far. After that, it’s time to face an order of magnitude price jump to get into fiber optic services. Well, that’s how it was. Now there’s another option that offers fiber bandwidth at T1 prices. Is this for real?

Comcast Business Class 100 Mbps / 10 Mbps service is definitely for real and the answer to a profit squeezed company’s prayers. All of a sudden, that big constriction at the LAN/WAN interface is gone. Files move fast. Web pages pop before your eyes. Email? You could drown in all the email that can flood in at 100 Mbps.

So, how do you get OC-3 or Fast Ethernet bandwidth levels without the high cost of fiber? What you tap into is HFC or Hybrid Fiber Coax. That’s the technical name for the finely tuned network that Comcast has deployed in their vast service area. There are two types of transport technologies that are welded together in HFC. Hence, the hybrid designation. The core of the network is a robust fiber optic backbone that is worthy of any major carrier. The access connections are coaxial copper cable. You know it as TV cable. What you may not realize is just how much bandwidth that coax connection supports.

Cable TV companies started using coaxial cable back when they were little more than enormous master antennas. The same coax that connects from your outdoor TV antenna to the back of your TV set can also bring in a much larger set of channels from your Cable company. Decades ago, it was all analog on Cable and over the air. Now it’s all digital. The RF spectrum on the cable is still channelized, with one digital TV station per slot. There are a lot of TV channels to choose from, but they don’t use all the possible channels that the cable can support. Some of those channels have been set aside for broadband or telephone services.

Besides the analog to digital transition, the other thing that’s changed with Cable operations is deployment of a fiber optic backbone to interconnect the multiple systems that the Cable operator owns and bring all the programming content into the neighborhood. This fiber network has far greater capacity than the old style large diameter coaxial distribution cable.

If fiber is so great, then why not run it directly to homes and businesses? Someday, that’s what will probably happen. Right now, the economics say no. Fiber termination equipment is expensive. Trenching a roll of plastic coated copper coax and connecting it to a wall outlet is cheap. With the ability to deliver television, broadband Internet access and telephone on that inexpensive little line, who wants to pony up for fiber?

You don’t or you’d already have installed SONET OC-3, OC-12, OC-48 or Ethernet over Fiber service for your business. Either the construction cost is a show stopper or the monthly lease fees are more than your budget can handle. Now you have another choice with Comcast’s 100 Mbps business broadband. It’s inexpensive and it can be installed quickly for any business that the Cable infrastructure passes.

What makes this service so affordable? For one thing, the cost of the network is spread over thousands of television and broadband customers. For another, this is not a true telecom service like SONET or Ethernet. Those services are symmetrical in that they have the same upload and download speeds. If you need 100 Mbps in both directions, Comcast’s offering won’t work for you. It’s specified at up to 100 Mbps download and up to 10 Mbps upload. That configuration is exactly what you need for general Internet access, where uploads are few and small but downloads are frequent and massive.

Also note that Cable is shared and not dedicated bandwidth. An OC-3 fiber connection gives you 155 Mbps all to yourself. Whatever you don’t use sits idle until you need it. You are sharing the Cable bandwidth availability with other users so that the network is always in use. This sharing also means that your bandwidth will vary throughout the day depending on what everyone is doing online. Does it matter? It may or may not, depending on how important it is to you to have that 100 Mbps at your disposal at all times.

Finally, there are no service level agreements like you have with T1 lines and the like. This is a “best effort” information service that is offered as-is. Even so, Comcast takes its network seriously and works to keep it as reliable as possible. If you’ve used home Cable broadband and been happy with the way it performed, then you’ll probably be happy with the bigger, faster Business Class service that gives all your employees a similar level of service while accessing the Internet on their desktop computers.

Are you a Michigan business owner or IT manager who’s anxious for high speed Internet access at a very affordable price? Check into prices and availability for 100 Mbps Internet options at your location. Note that Comcast and other fast Internet services are also available for locations other than Michigan.



Note: Photo of Detroit skyline courtesy of Wikimedia Commons.

100 Mbps Internet for Business

DS3 Internet bandwidth at 45 Mbps has been the mainstay of many mid-size businesses. It is readily available and a substantial bandwidth increase over T1 or even bonded T1 lines. Now even DS3 bandwidth isn’t enough to keep up with many simultaneous video users or cloud service applications. It’s time to move on up to 100 Mbps Internet access.

The 100 Mbps service level is particularly significant because it precisely matches one of the standard Ethernet LAN speeds called “Fast” Ethernet. Most all NICs (Network Interface Cards) built into nearly everything from PCs to routers, switches and printers support 10/100 Mbps Ethernet. That’s the 10 Mbps and 100 Mbps network speeds. Newer NICs expand that to include Gigabit Ethernet or GigE with 10/100/1000 Mbps ports.

The point is that if your LAN is running at 100 Mbps and you connect to the Internet at some lower speed, you are going to experience a slowdown on anything to or from the Internet. At low network activity levels, you may not notice the difference. It’s when there are lots users doing lots of things simultaneously that the congestion occurs. The big choke point, more often than not, is the WAN or wide area network connection to the Internet.

Fortunately, 100 Mbps Internet service for businesses is more available and less expensive than ever before. Let’s take a look at the different technical approaches and their advantages or disadvantages.

The traditional 100 Mbps telecom service is OC-3, which actually runs at about 155 Mbps. This is a SONET fiber optic service offered by switched circuit telecom companies nationwide. OC-3 is a transport service that can carry anything from thousands of telephone calls to private point to point connections to dedicated Internet access. It’s also often used to deliver lower speed services, such as DS3. You probably don’t think of DS3 as a fiber optic service because your connection is through BNC connectors on small diameter coaxial cables. Still, it’s likely dropped off at your location using an add/drop multiplexer connected to a SONET fiber cable.

OC-3 has the advantage of being a well established and highly popular digital line service. It comes with an SLA or Service Level Agreement, standard in the telecom industry. Your bandwidth is both dedicated and symmetrical. Dedicated means that you don’t share that 155 Mbps with any other company or individual users. Whatever bandwidth you aren’t using at the moment sits there idling so that you always have the full 155 Mbps at your disposal. Symmetrical means that you have 155 Mbps in both the upload and download directions. Sometimes this is expressed as 155 x 155 Mbps Internet access.

Competing directly with OC-3 bandwidth is Carrier Ethernet. Fast Ethernet at 100 Mbps is an easy interface to your LAN. All you need to do is plug in a standard RJ-45 patch cable and your router has Internet access. There’s no need for fiber optic cabling and special interface cards like you have with OC-3 or a managed OC-3 router installed by the service provider. Like OC-3, 100 Mbps FAST Ethernet is both symmetrical and dedicated. It also comes with an SLA from the provider.

Fast Ethernet service is available over both fiber optic and twisted pair connections. In fairness, the Ethernet over Copper service at this speed is fairly distance limited so you’ll likely find it only in major metropolitan business districts. Slower speeds, say 10 or 20 Mbps, have a much greater range and are more readily available.

Ethernet over Fiber is similar to OC-3 with two important advantages. First, the cost per Mbps is often lower, even much lower than OC-3 where available. Another advantage is that Carrier Ethernet services are highly scalable. The next increment up from OC-3 is OC-12 at 622 Mbps. With Carrier Ethernet, you could go from 100 Mbps on up to 200, 500 or even 1,000 Mbps without an equipment change. The trick is to have a Gigabit Ethernet port installed initially. Then order the bandwidth you need today with the understanding that you can easily upgrade in the future when you need to.

A final option that is becoming more available is 100 Mbps Cable business broadband. This is a shared asymmetrical bandwidth service sold without service level agreements. It’s very similar to the Cable broadband you get at home, but with extra features such as static IP addresses and special customer support. Your 100 Mbps is in the download direction only. Upload speeds are on the order of 10 Mbps. This bandwidth is shared by many other users, so it varies all over the place even during business hours. Even so, you can’t beat the pricing which is similar to a T1 line. If all you need is casual Internet access for many employees and have a very limited budget, this could be the answer for you.

Are you ready to establish Business Internet service at a new location or upgrade from bonded T1 or DS3 to 100 Mbps or higher Internet access? If so, check 100 Mbps Internet pricing and availability for your business location. Complementary consulting is also available to help you sort through the options.

SONET Rings To Support Ethernet

The hot bandwidth service these days is Carrier Ethernet. Everybody wants it once they see the cost advantage over the WAN connection they have now. The big question is can they get it?

In most cases, the answer is yes for a couple of reasons. First, new competitive carriers are rapidly building out their fiber optic core networks based on IP from the start. These networks are tailor made for Carrier Ethernet services. It’s relatively easy to get a point to point Ethernet connection between two distant business locations and use it to link their respective LANs. The result is one larger bridged LAN that enables all employees to be on essentially the same corporate network.

The other reason that Ethernet WAN services are so readily available is that established SONET fiber optic networks are being pressed into service to deliver Ethernet to the customer. This is known as Ethernet over SONET or EoS. The core of the network is still SONET, but operations at that level are invisible to you. As far as you are concerned, your connection is Ethernet all the way.

There’s no reason that SONET can’t transport Ethernet, ATM or other protocols. It was designed as a transport technology and has been adapted over the years to carry whatever traffic required hauling. The origins of SONET, like T-Carrier, are with the telephone industry. The name is an acronym for Synchronous Optical NETwork. Note the term synchronous. That tells you SONET is set up to be a highly synchronized network. The designed is based on multiplexing thousands of small channels called DS0s that each hold one telephone call. These DS0 building blocks can be combined to create T1 and T3 lines or SONET services such as OC-3, OC-12 and OC-48.

The beauty of synchronization for circuit switched architectures based on time division multiplexing is that everything is orchestrated so tightly and you can easily multiplex and demultiplex channels and higher level services. The device that does this is called an ADM or Add/Drop Multiplexer. An ADM can drop off a T1 line, DS3, OC3 or other service at your door from a much higher speed fiber line that carries traffic for many customers.

How does Ethernet squeeze into those tiny telephone channels? It takes some doing, considering that each DS0 carries exactly 64 Kbps. That’s about the speed of an old dial-up modem. What the industry has done is replace the telephone oriented channels with large concatenated frames and various mapping techniques to more efficiently carry Ethernet packets. SONET networks can now readily carry Ethernet services from standard 10 Mbps Ethernet to 100 Mbps Fast Ethernet, 1000 Mbps Gigabit Ethernet (GigE), and 10 Gigabit Ethernet (10GigE).

A feature of most SONET networks that makes them highly reliable is their twin ring design. Two separate fiber strands are used simultaneously. Each carries the same traffic, but in opposite directions. If a fault occurs in the working ring, the network switches over to the protection ring within 50 mSec. This self-healing property works best when the two rings are widely separated so that a single backhoe cut or equipment fault doesn’t take out both rings at once.

Ethernet over SONET and native IP networks are making Carrier Ethernet services of all speeds readily available for businesses looking to upgrade their bandwidth connections at reasonable costs. How much are we talking? Find out with an instant online Ethernet Fiber quote for 10 Mbps to 1 Gbps service levels. Higher bandwidths and SONET services quotes need some manual effort but will be sent to you promptly.

MegaPath Pushes EoC to 400 Mbps

The bandwidth of Ethernet over Copper services has been setting new standards on a regular basis. It’s now at the point where you have to think seriously whether you really need to invest in fiber optic construction to light your building or if EoC will get the job done. MegaPath has just upped the ante for those doing copper/fiber tradeoffs. The new upper limit is 400 Mbps.

Many companies that are using Ethernet over Copper are doing so as T1 line replacements to get twice the bandwidth for the same cost. The 2x2 Mbps and 3x3 Mbps options are especially popular for this application. Other companies are moving to mid-band Ethernet where even bonded T1 cannot go. These are bandwidths in the 10 to 20 Mbps range, suitable for many mid-size operations. It’s the companies that have hundred or thousands of employees to support or are engaged in high bandwidth requirement applications that have been stuck with fiber as their only option.

That’s all changed within the last year. More sophisticated modulation schemes and bonding to 8 copper pairs have pushed the bandwidth limit past 50 Mbps to 100 Mbps and even 200 Mbps. Now, MegaPath is offering a new service that can exceed 400 Mbps. This could be a strong option for companies that have specified OC-3 SONET fiber optic service at 155 Mbps and even OC-12 at 622 Mbps.

To be fair, the 400 Mbps speed is only specified on the download path. Upload speeds could be a fraction of that. Does asymmetrical service make sense in a business environment? It could, depending on what you are doing with it. Internet access is typically asymmetrical in nature, with download speeds 10x what you use for upload. That’s because most internet usage at the desktop consists of sending keyboard requests for Web pages or files and then viewing the results or making other use of the data in applications. The principal is that the huge files are almost always coming to the user rather than being sent.

That’s especially true for video, now the number one source of traffic on the Internet. It takes relative little upload activity to request the video files, even streaming, and a considerable amount of download bandwidth over extended periods of time.

Some cloud applications also fall into this category. If you routinely send huge files to the cloud and expect little back, then the asymmetry is wrong for you. However, if most of your bandwidth activity is using large information packages delivered from the cloud, then an asymmetric bandwidth connection could work in your favor.

MegaPath is also offering symmetrical Ethernet bandwidth up to 100 Mbps x 100 Mbps for point to point, point to multipoint and dedicated Internet access. Other options include Ethernet over DS1 and Ethernet over DS3 to address the inherent distance limitations of Ethernet over Copper service. As part of rolling out the new higher bandwidth services, MegaPath is increasing the number of central offices with EoC equipment from 200 to over 680 within a year.

Are your bandwidth requirements increasing, perhaps because of a current or planned move to cloud-based services? If so, you should know that fiber optic connections are only one option to get the line speeds you need for efficient operation. Get competitive quotes now for low, mid-level, and high bandwidth Ethernet over Copper line services for your business location. Sorry, no residential service available.

What Is a DS3 Circuit Or T3 Line?

Companies that have outgrown their T1 lines often upgrade to DS3 bandwidth. Let’s take a look at what DS3 has to offer, how it relates to T3 lines, and recent competition from Ethernet over Copper services.

DS3 stands for Digital Signal level 3. The specification for it is found in the T-carrier standards developed by Bell Labs for the telephone industry. The way it works is that DS0 is the smallest unit with a bandwidth of 64 Kbps. That’s just the right size to transport one digitized telephone call using PCM (Pulse Code Modulation), the original digital phone standard. You combine 24 DS0s to create a DS1 that runs on a T1 line. DS3 is the equivalent of 28 DS1s or 672 DS0s.

You’ll often hear DS3 referred to as T3, like DS1 is called T1. The fine line of difference between DS3 and T3 is that DS3 refers to the actual structure of the data stream and T3 refers to the physical transmission layer. Most of the time, they are treated as equivalent. The reason that the digital signal has its own definition is that you can multiplex DS3 as well as DS1 to make much larger bandwidth services. At the far end, you can then demultiplex the signals to recover the original DS3 or DS1.

Combine the 672 voice channels plus the bits needed for synchronization and line maintenance and you have a bandwidth of 44.736 Mbps. That’s commonly referred to as 45 Mbps. You can order DS3 as a telephone trunk line if you have a high capacity phone systems like a PBX serving a major corporation. You can also order DS3 as a data line with one big chunk of bandwidth, namely 45 Mbps.

If you order a T3 line or DS3 service, it will be delivered to you on a pair of 75 ohm coaxial cables using BNC connectors. Look at a DS3 router card and you’ll see the connectors, one for receive and one for transmit. Some cards support more than one DS3 connection so you’ll see multiple sets of connectors.

The coaxial cable used to connect your DS3 router can be no more than 450 feet in length (only 225 feet if using small diameter coax). That’s fine for connecting to the telco demarc in your building, but how does the DS3 get to the central office?

The actual provisioning of DS3 services can be via fixed wireless transmission or SONET fiber optic service. DS3 can be easily encapsulated into a SONET STS-1, as they are both telco standards designed to be compatible. An OC-3 service can carry 3 STS-1s for 3 DS3s.

What if you are not in range for fixed wireless and there’s no fiber in the area? Are you stuck with the 1.5 Mbps T1 bandwidth? No, not really. T1 lines can be bonded to create larger bandwidths. This works well up to 10 or 12 Mbps. Bridging the gap between bonded T1 and DS3 is Ethernet over Copper. This technology also uses multiple copper pair instead of fiber strands, but can deliver much higher bandwidth than T1 technology.

Ethernet over Copper (EoC) bandwidth starts at typically 2 Mbps and goes up to 200 Mbps in some areas. This not only gives you a way to grow your bandwidth incrementally beyond T1, but may delay fiber installation indefinitely. The one limitation of EoC is that it is distance limited. How far you are from the office where your copper bundle is terminated determines the bandwidth that is possible. That office also needs to have EoC equipment available.

Have you outgrown your T1 line service or have an immediate business need for bandwidth in the 45 Mbps range? If so get pricing and availability of DS3 bandwidth services, including Ethernet over Copper if available.



Photo of BNC connector courtesy of Wikimedia Commons.

Fiber Maps At Your Fingertips

You’d like to move to higher bandwidth services, but you have no idea what that is going to cost. Horror stories of fiber optic construction costs abound. How can you tell if the cost of moving up from copper to fiber optic bandwidth services will be trivial or unacceptable?

The best thing you can do is get a set of competing quotes from many carriers that have facilities in your area. That’s going to take a lot of time and energy, isn’t it? Not if you approach it the right way. By going through a telecom broker, like Telarus, Inc., the effort on your part is next to nothing and you’ll have results quickly. Moreover, you get a comprehensive report that gives you pricing from all the important carriers in your marketplace.

Want to find out right this minute if there is fiber nearby? You can do this in a matter of seconds with just a quick click to the Ethernet Today Shop For Ethernet search box. All you need to do is enter the street address of your building, city, state and zip code and the system will automatically search the database and give you a map and list of buildings lit for Ethernet fiber optic service nearby.

Why Ethernet? The best prices for higher bandwidth services have changed from SONET services, such as OC-3, OC-12 or OC-48, to Ethernet over Fiber services such as 100 Mbps Fast Ethernet or 1000 Mbps Gigabit Ethernet (GigE). If you request pricing, you can also ask for equivalent SONET service prices so you can compare and see how much you are saving. In some situations, you may already be set up for SONET and happy with the arrangement. That’s fine, but you might as well get better pricing on your next contract.

Location is everything when it comes to fiber optic services. The best situation is already being in a building that is lit for the fiber optic service you want. The bandwidth level isn’t important. What is important is that someone has already paid the cost of bringing in the fiber and getting it working. Fiber has so much bandwidth capacity that there is plenty for whatever your needs require, even if another tenant in the building is already connected to that carrier.

What if you want Ethernet and your building is only lit for SONET? Have a look at the cost figures, including any construction charges, and decide whether it is better to just stick with SONET bandwidth or have Ethernet brought in. Sometimes you can get what’s called Ethernet over SONET that has better pricing than the traditional OCx service levels.

Don’t despair if you aren’t in or next door to a building lit for fiber optic service. Carriers are more competitive than ever. One or more may well waive the construction fees to get your business. The chances of this increase dramatically if you round up other tenants in the building and all offer to subscribe to fiber services with a very attractive combined bandwidth.

Here’s something else. Even buildings too expensive to light with fiber can get bandwidths far above the traditional T1 lines that come in on telco copper. Today’s Ethernet over Copper technology bonds multiple pair to bring in bandwidths of 10, 20, 50 and even 100 Mbps. That’s done over already installed copper wiring, so construction costs are minimal to nothing. This much bandwidth is adequate for many, many businesses.

Are you at least curious as to what fiber optic services may be nearby? If so, instantly check for lit buildings near your location and then request the pricing and recommendations you need to get the best deal for the least cost.

Fiber Buildings Offer High Bandwidth

Are you looking to increase your bandwidth connections from the low to medium speeds you can get delivered over twisted pair copper or fixed wireless, on up to the high speeds available only over fiber optic cabling? Would you like to do that while avoiding the often prohibitive construction cost of bringing in new fiber service? Then what you need is a fiber building.

In this case, a fiber building isn’t one that’s made out of carbon fiber construction or anything exotic like that. Fiber doesn’t refer to the construction materials of the structure itself. It refers to the type of telecom services already installed. A fiber building is one that already has fiber optic service brought in and operating. That’s why you often hear them referred to as fiber lit buildings. Lit means that there is laser light shining down those fiber strands and carrying digital payloads.

So, how do you find a fiber building? Peeking in windows after dark won’t work and will probably get you in trouble. You could start calling all the office and industrial buildings in the area and mark the lit building locations on a map. Or you can take the easy approach and use an automated online tool that will do all that legwork for you. It’s called the “Lit Building Locator.” You simply enter the street address of the building you are in now and you’ll get a map of lit buildings in the area and how far they are from you.

The most popular fiber optic bandwidth service being requested now is Metro or Carrier Ethernet. The beauty of Ethernet is that it is the same protocol that you are already running on your corporate LAN. That makes interfacing very easy. Fiber optic Ethernet services include Fast Ethernet at 100 Mbps, Gigabit Ethernet (GigE) at 1,000 Mbps and 10 Gigabit Ethernet (GigE) at 10,000 Mbps. In some cases 40 Gigabit Ethernet is also available for the most demanding applications.

You should be aware that there is another type of fiber optic service that is also installed in “lit” buildings. This is the traditional telecom service called SONET for Synchronous Optical NETwork. Bandwidth services include OC-3 at 155 Mbps, OC-12 at 622 Mbps, OC-24 at 1.2 Gbps and OC-48 at 2.4 Mbps. Higher speeds include OC-192 at 9.95 Mbps that is compatible with 10 GigE WAN-PHY and OC-768 running at 40 Gbps.

Which fiber service should you choose? There may or may not be a choice. Once a fiber service is brought into a building, competing services generally choose other buildings to light up. Any particular building may be lit for SONET or Ethernet. There is a service called Ethernet over SONET, including 10 GigE WAN-PHY, that can give you the protocol you want even if your building is set up to legacy telco standards. Another reason that customers are asking for Ethernet is that it tends to be less expensive per Mbps than SONET services, where available.

Are you looking for more bandwidth? Why not check for fiber buildings and see if yours or one nearby is lit? If close, you may be able to get a carrier to make the necessary installation with no or discounted construction costs if you will be ordering a high bandwidth level. Perhaps you can find other tenants and pool your request to make the installation even more attractive.



Note: Photo courtesy of Diego Silvestre on Wikimedia Commons.

Fiber Connectivity Options For Business

Fiber optic bandwidth is now well within the reach of most medium and large companies, and even smaller organizations that are bandwidth driven. What’s changed? Lower prices and more options. That’s good news for large bandwidth users. Let’s take a look at what’s available that you may not know about.

Fiber optic bandwidth services tend to fall into two categories. There is the traditional time division multiplexed technology that came out of telephone company research. Competing with those legacy services are the newer IP-centric networks being offered by competitive service providers as well as incumbent telecom carriers.

The fiber optic bandwidth service that is most familiar is called OC-3 or Optical Carrier - level 3. It runs at 155.52 Mbps, commonly referred to as 156 Mbps. What you might not realize is that some lower speed services travel part or all of the way from the service provider to your location on fiber optic cabling. These include T1 and DS3, generally thought of as copper-based telecom services. It’s up to the carrier how they want to transport their bandwidth services, but it’s made easier because both T1 and DS3 are easily multiplexed onto OC-3.

Why is that? It’s because T1, DS3 and OC-3 were all developed by the telephone industry for its own use. The smallest element is called a DS0, which is 64 Kbps of bandwidth organized as 8 data bits x 8 Kbps sampling frequency. A DS0 is exactly the size needed to carry one digitized telephone conversation. Package 24 of these DS0 channels together and you have a T1 line running at 1.5 Mbps. Package 28 T1 lines or 672 DS0 channels together an you have DS3 service at 45 Mbps. Now, package 3 DS3 services together and you have OC-3 at 156 Mbps. The device that does the packaging and unpackaging is called an Add/Drop Multiplexer or ADM.

OC-3 fiber optic service is part of an industry standard known as SONET for Synchronous Optical NETwork. SONET is a US standard. The equivalent international fiber optic standard is called SDH for Synchronous Digital Hierarchy. As you probably know, there are higher speed fiber services in the same OCx family. Commonly available services include OC-12 at 622 Mbps, OC-24 at 1.244 Gbps, OC-48 at 2.488 Gbps, OC-192 at 9.953 Gbps and OC-768 at 39.812 Gbps. That last one is primarily used by service providers themselves.

What’s characterized SONET fiber optic services for decades is high cost and very limited availability. Your best bet for connecting to these high bandwidth services has been at a colocation center, also called a carrier hotel. There’s little to no construction cost to get that level of bandwidth in a colo center, because the carriers have a presence within the building. It’s just a matter of getting a fiber optic cable drop from their equipment cage to yours.

SONET services delivered to your door have also come down in price due to increasing demand from business and heavy competition from another service called Carrier Ethernet. This is Ethernet like you have on your LAN, but extended into the metropolitan and wide area networks. The most familiar name for this service is Metro Ethernet. That’s also where you are most likely to find it - in major metropolitan areas.

Metro Ethernet is a packet or IP-based network service rather than a synchronous TDM service. One difference is that you don’t need special interface circuitry to connect to an Ethernet service. After all, it’s Ethernet and it’s delivered to you on an Ethernet connector. The other difference is the scalability of services. Common speeds are 10 Mbps, 100 Mbps and 1000 Mbps to mirror the standard network speeds. You can also get 10 Gbps now. But you are not limited to these particular bandwidth increments. Most carriers offer a wide variety of speeds from 10 Mbps to 10 Gbps. If you install an Ethernet port at the highest speed you expect to use, you can pay for a smaller bandwidth increment to get started and then upgrade to a higher speed when needed. Often, all that is required is a phone call to your service provider to request an increase in bandwidth.

How about fiber optic pricing? You may still find areas where SONET services are the least expensive, but most of the time it’s Ethernet that has the cost advantage. That’s especially true if you are not running at one of the standard SONET speeds. The cost difference can be half or less for the same bandwidth when you replace SONET with Ethernet.

Do you currently use fiber optic bandwidth services or are you considering them for your business? If so, don’t order anything until you get a side by side price comparison of SONET and Ethernet fiber optic bandwidth. You may be surprised by what’s available at a lower cost than you expected.