
So whad'ya think?
Personal blog, IT tech tips, woodworking, travel, and anything else we care to share.. it's all on here. Comment if you like a post. It's always a pleasure to know others enjoy reading the blog.
Well, as of 9:30 this evening I'm back in town. Tim and I got up early this moring in Greenville, SC and completed our last day of training and then took the FOA CFOT Exam (Fiber Optic Association's Certified Fiber Optic Technician). As of tonight, with a passing score of 93, I am officially a licensed fiber technician for the USA. I know it's not a large step for most people, but after a few years of doing fiber optics anyway, it's nice to have some accreditation to back it up. This also set me up for the next stage, which is becoming an AFL partner in eastern North Carolina, which will allow me to offer a 25 year warranty on all our fiber work, in addition to the 25 year warranty we already offer on our HellermannTyton twisted-pair networking.
END OF BACK PATTING SESSION...
Ok.. the part I want your opinion on.
Ok. I have an opinion question and PLEASE take a moment to respond to this and let me know your opinions. I need to settle on a name for the corporation to be able to accept our partners into our personally owned business. We already have 3rd and Wayne, which is technically a sole proprietorship. However, in my mind, if I were a partner coming in to join the business, I'd prefer to a) Have my name on the letterhead too, or B) Be joining a corporation that isn't specifically representative of any person or persons.
To that end, we have bought and purchased a few different names over the last few months, and now it's time to decide. As primary shareholder, I can technically make the decision on my own and run with it, but I'd prefer to have the agreement of the BoD. There are currently two names on the table for discussion. (PLEASE COMMENT ON WHAT YOU THINK.. AND COMMENT HONESTLY)
Option 1: Twisted Networx (www.twistednetworx.com and www.twnetworx.com)
Pros:
Cons:
Option 2: Fidelit(y) Networks (The "y" is shaded out, but it's there still)
Pros:
Cons:
RESPONSES?
Seriously, whoever you might be, take a moment and send me your opinion. Even if you just take a second to make a comment about one or the other, ANY input is welcome. I'm at the point where I need to make a decision, and while I'm capable of doing it fine on my own, I know that I sometimes get near-sighted with my visions for the company so I want to hear what the world at large thinks.
Any and all opinions welcome.
Well, since I like to write and I also need to study, I decided to couple both into one. I'm reviewing the notes for my BICSI fiber exam tomorrow. If you have even the least bit of a life, you'll skip this whole post! If not, you're going to be bored to death!
Primary Elements of Optical Fiber: These are definitely on the test. (believe it or not, people miss this one)
Core Elements (What makes up the difference between the fibers)
Single Mode:
Multi Mode:
Mechanical Strength Properties of Fiber Cable
Waveguiding Fiber (controlling the flow of lightwaves down the path of glass at a given frequency)
Index of Refraction:
Refractive Index (Optical Density Principles)
Critical Angle
Light will bend as it travels from one index of refraction to another with a different n. The bend increases as the angle of entry (numerical aperature) decreases. Eventually, the angle of light is small enough to prevent light from entering another n. This is the critical angle.
The numerical aperature is the angle of approach of light coming into the fiber, represented in a degree format.
INDEXING light within fiber:
There are two kinds of indexing for fiber-optic cables currently used today. Those are Stepped Index and Graded Intex. Stepped index is only used in singlemode fiber, and some rare uses of MM fiber such as home audio mm fiber, requiring communications in the ultra high wavelengths.
For MultiMode (MM) purposes, a Graded index is used to help turn the sharp angles of refraction into more wave-like shapes (smooth curves). This is achieved by applying cladding to the core of the fiber using multiple layers, each with a slightly higher index of refraction as they increase in distance from the axis of the core. Utilizing this technique bends the light in a smoother wave form (sinusodial) and increases the speed at which the light travels through the fiber.
Modes of Propogation
Singlemode: Possesses one single mode (wave) of light for increased speed, better for longer distances.
MultiMode: possesses many waves of light, due to the wider numerical aperature. The large core(50/125 or 62.5/125) means light can travel on more wavelengths at once through the fiber.
Since SM fiber has only one mode, there is no pulse spreading, meaning more bandwidth. Conversely, MM fiber's larger core allows more pathways of light to enter the fiber, which in turn creates pulse spreading (dispersion) that limits bandwitch. The conversion of the data on the signal end is translated by a receiver on the end node, which is looking for a specific binary format. (For example 1, 0, 1, 0, 1,0, etc....) Multimode fiber possesses more than one wave of light, meaning the modes might get overlapped (dispersed) resulting in the receiving end signal looking more like 1, 1, 1,0,0, 1, 0, 1, etc. Compensating for this modal dispersion decreases bandwidth availability.
Multimode Sizes: (50 vs 62.5)
Inrinsic Attenuation
Intrinsic attenuation occurs due to something inside or inherent to the fiber. It is caused by impurities in the glass during the manufacturing process. As precise as manufacturing is, there is no way to eliminate all impurities, though technological advances have caused attenuation to decrease dramatically since the first optical fiber in 1970.
When a light signal hits an impurity in the fiber, one of two things will occur: it will scatter or it will be absorbed.
Extrinsic Attenuation
The second category of attenuation is extrinsic attenuation. Extrinsic attenuation can be caused by two external mechanisms: macrobending or microbending. Both cause a reduction of optical power.
Macrobending
If a bend is imposed on an optical fiber, strain is placed on the fiber along the region that is bent. The bending strain will affect the refractive index and the critical angle of the light ray in that specific area. As a result, light traveling in the core can refract out, and loss occurs. (Figure 13)
A macrobend is a large-scale bend that is visible; for example, a fiber wrapped around a person's finger. This loss is generally reversible once bends are corrected.
To prevent macrobends, all optical fiber (and optical fiber cable) has a minimum bend radius specification that should not be exceeded. This is a restriction on how much bend a fiber can withstand before experiencing problems in optical performance or mechanical reliability. The rule of thumb for minimum bend radius is 1 1/2" for bare, single-mode fiber; 10 times the cable's outside diameter (O.D.) for non-armored cable; and 15 times the cable's O.D. for armored cable.
Microbending (pinching)
The second extrinsic cause of attenuation is a microbend. This is a small-scale distortion, generally indicative of pressure on the fiber. (See Figure 14 below.) Microbending may be related to temperature, tensile stress, or crushing force. Like macrobending, microbending will cause a reduction of optical power in the glass.
Microbending is very localized, and the bend may not be clearly visible upon inspection. With bare fiber, microbending may be reversible; in the cabling process, it may not.
Modal Dispersion:
Chromatic Dispersion: (on test)
Waveguide Dispersion
Memorize the three step process for fx manufacturing:
(Indoor cable doesn't need the loose tube design because it isn't going to be subjected to temperature extremes. Vast changes in exterior temperature require that the Loose Tube fiber allow for the fiber and other components to expand and contract during different environments, which is why they are "loosely" stacked inside the tubing.)
Loose Tube Cable: (250 mµ fibers floating in gel, decoupled from cabling stresses.) (outside to inside shown below)
Loose Tube Armored
UniFlex (Small diameter, up to 24 cores maximum)
ADSS: All Dielectric Self Supporting - Tensile Strength of 60,000 lbs.
Optical Ground Wire
Loose Tube
Tight Buffer
Ok.. giving up.. going to bed.
Hey all. I'm down in Greenville, SC for training. Been a long day here. Tim and I are working at the AFL manufacturing plant, getting fiber certified! Yeah! This will add 14 more credit hours towards my BICSI certification. It's been a really long long day! We've been throwing around figures and acronyms all day to the point that my skull hurts from just thinking so much! Tomorrow I have a full day again, culminating in the CFOT exam (Certified Fiber Optic Technician), which will put me one step away from being a certified partner for AFL and two steps away from being a full fiber instructor. So, wish me luck!
Tonight's gonna suck though. I was looking forward to spending about three hours in the hot tub, but it looks like I'll be spending three hours in front of this computer instead, writing notes all night on test materials for tomorrow.
Right now, however, I think Tim and I are gonna take off and get some chow.
See you all soon!
Oi. I'm tired. It's 9:45 PM and I'm just sitting down with a nice cup of decent french-vanilla coffee, at my comfortable desk, in my even more comfortable shoe-like-things, after a long day of working and driving. It all started yesterday morning; I had court first thing in the morning and then had to get my guys together, load the truck and drive 6 hours to northern Maryland to install another monitoring system for a client. After spending 6 hours on the road getting sore and stiff, Wess, Tim, and myself got on-site at about 6 PM last night and started to run the gamut - pulling coax cable, surveying for the best camera locations, installing cameras, setting up the internet backhaul to send the video feed to corporate, installing on-site monitoring capabilities, etc... It was a long night. We were finally run out of the location at midnight, almost finished with our job, so we had to get a hotel in Lexington Park, MD for the evening.
We got up early this morning and returned to the site to complete the final points of our installation, aim and focus the camera lenses, check for remote connectivity, and then grabbed a quick lunch before heading back to North Carolina... another long 6 hour drive.
The evening ended nicely though, with dinner with our ladies at Chico's across town. It's cute I suppose, from an outside viewpoint, to see three tired and exhausted fellows come meet their prettier halves for dinner. We were all glad to be back with our ladies, as always.
On the recent side of business news for us, we've been approved for our new office location, procured insurance for the business, chosen a new company name (I think.. maybe) and are making strides to be "good to go" by April of this year. All I have to do now is pay the double first months' rent, pay the entire year's insurance bill, get my office furniture out of storage, and then get moved into the new place.. easy right? Pfft.. no. The initial rent bill is about $900.00. The initial insurance payment is about $900.00. The cost to get my furniture delivered.... you guessed it.. about $900.00. Anyone else see a theme developing here? So, as soon as I get the $2,700.00 I need to get things off the ground right, we'll be up and running!
On the personal side, I have to go beat Marcus with a stick! Being the gardening lover that I am, I was immediately jealous of his new house when I saw the spacious back yard he has and heard the plans he has to cultivate it into a thriving garden. Lacking a back yard, I have chosen yet again to do what I do so well... locate my entire garden 12 feet in the air... on my balcony, completely sustained within 5-gallon buckets! Yes.. it's cheesy, but it always looks nice.. and who else do you know that can say they can still be growing 10 feet tomato bushes in November?
Now, I'm going to go over and see Marcus this weekend and let him revel in his new garden... and secretly I'll hate him for it! (Kidding, Marcus). Nah.. I"m sure it's beautiful. He seems to be the type to pay great attention to detail. I think I'm going to spend the afternoons this summer living vicariously through HIS back yard gargen in lieu of my own! Wouldn't be the first time.
What else is there to tell you guys about? There isn't too much else going on over here on this side of the pond. I've been keeping an eye on my libyan friend's blogs. It always amazes me how much more I want to read and learn about the country after being able to experience it and understand it from a firsthand point of view. I mean, let's face it. You live ANYWHERE for 7 months and you can say that you pretty much "lived" there, as opposed to saying "I've been there."
I can't wait to return overseas again! I'm hoping that somewhere in my future there will be opportunities for more travel, either with my current company, or through others. I've actually had some interest generated from a few firms I've met while overseas... so who knows what the future may bring.
Well, I'm going to sign off of here and get some work done before bed time. I still need to email out some invoices to customers and do my profit/loss statements for the recent jobs... ugh.
Till next time!
Tommy
Morning World! It's almost 7:30 and I had a few minutes so I thought I'd say hello. I've got a long day today. My boss forgot to send in the payments for my child support for the last 4 months, even though he deducted it from my check, so I get to go enjoy a visit to district court this morning! Joy!
Thankfully, he wrote me a check for the amount he was supposed to pay, so all I pretty much need to do is show up and pay it and things should be ok againl. The child-support officer I'm working with is the first nice lady I've ever met within the realms of the child support system.
Just a curiousity, I wonder how much money and court cost they'd save if they'd simply make a phone call and say "Hi. Did you know your direct draft hasn't been coming in regularly? Can you check on that for us?" They'd rather waste EVERYONE's time by simply filing court orders, throwing around subpoenas, threatening people with jail time, etc. Anyway, it's being handled this time so I can't complain too much.
After that wonderful start to my morning, I get to drive all the way to Maryland to do a job for a customer. We have a customer's store to install cameras in today... so it's a long day on the road for Wess, Tim, and myself. We're hoping to make the job a one day trip, but we will likely wind up in a hotel tonight, too exhausted to make it all the way home. Dunno yet, really. We'll have to see how it goes.
How have the rest of you been? The comments from the American side of the realm have been sparse lately.
On the contrary, the African interest in the blog has grown substantially over the last few weeks. I've had numerous traffic from Britain and Africa, due to some of the posts I made while in Africa. Hell, one of my posts ended up quoted on a lot of different blogs around the world. I know it's nothing to some people, but the exposure and interest generated was neat to see. I can tell you ONE thing for sure, I'll be sure to condider my words a little more heavily the next time I sit down in Tripoli and compose a 4 page rant on the cultural aspects of another country...
Speaking of that, I guess most of you know we're gearing up for another trip to Sand Land here shortly. I'm currently waiting on the Letter of Credit to arrive from Africa, via the bank of London. Once that gets here, I can ship the equipment. After that starts, we'll wait about two weeks and leave for Africa. The shipment will take 38 days to cross the atlantic ocean, change ships in London, and be carried on to Libya from there, so we'll still be there in plenty of time, however it seems I'm back to the waiting game.... waiting on the customer to do something they should have done over a month ago... ugh.. some things never change over there.
Well, April's heading off to work so it's my turn to jump in the shower and get ready for this long day. You all have a wonderful day and I'll "see" you soon.
Tommy
Sorry I've been so lax in posting lately. There's really not been much going on that's blog-worthy of late. Since arriving back from Africa this last time, we have pretty much been running in overdrive preparing for our return trip for the new client. Can I just take a moment to say I'm SO glad I won't be going back for the GECOL project any time soon? That one is officially done and out of my hands.
Mainly, as I said, we've been gearing up for the VEBA project, running our small private company jobs here in the regional area, and training up on fusion splicing techniques. Sounds like fun huh? Well, I'll say this... it passes the time.
Tonight, I'm off to shag lessons at the City Bistro. They started having lessons on Sunday and it gives me something nice to do to get out of the house a little during the weekend. I wish I'd done something earlier today. It's absolutely gorgeous here today.
Well, I'm going to go back to enjoying a book on my patio in the sunlight until time to leave for Shaggin. I just wanted to say hello to the world. Drop me a line any time.
Tommy
Well, I should say the girls night out shaggin'. I just ran for drinks and looked pretty all night. lol. We had a really good time. Danielle and Marty came out to join me for the night and now I have a shag-date on Sunday at the Bistro. Anyway, here are some pics from the evening's events.
Those of you who haven't been there in awhile would be impressed with the new look going on at On Cue. Frank has done a pretty good job of upscaling the place. This is the Embers singin' something... I don't remember exactly what.
The usual devilish duo.. rarely found together without the presence of alcohol, but always having a good time in style!
You didn't really think I was goingto let a photo opportunity pass by when I had a chance to be in the middle of two chicks did ya?
Me and Marty!
D! and Me! I can hear her now... take my damned picture down.. you know I hate seeing my picture online.. I'l kill you.. etc etc etc.
Me and April just hangin out.
I didn't get a chance to post this while I was there due to bandwidth limitations, but this is my friend Nadir breakin down Arab-Style! (Ok.. so no one ever gets to pick on MY dancing again!)
I got to see the Embers live last night at On Cue. Yeah! Anyway, thought I'd share a short clip with you.
Glad to see all of you that were there! Missed those who weren't!
Love ya,
Tommy