Thursday, July 23, 2015

Cheap Alternative To Cisco Call Manager Based Phone Systems

Want to save money on your next PBX? Ditch that proprietary Public Branch Exchange telephone system and use an open source Asterisk based PBX instead. For just the small investment in hardware and some mental work on your part, you can have a nice phone system for not a lot of money.

Instead of paying thousands for Cisco Call Manager and licensing fees, Asterisk only requires modest hardware and some computer know how. Sites such as Nerd Vittles can show you how to make your very own PBX in short order.

Begin with a server, the computer hardware that runs the phone services. Then add Asterisk, this is like Cisco's Call Manager. Then add an unmanaged switch. Think D-Link or 3Com. Then run all of this in RedHat/CentOS linux or even Ubuntu. Your cheap PBX is on its way.

The heart of this phone system is SIP. This is Session Initiation Protocol, an open source phone protocol. This means that you do not need to pay for the software, but for ease of use, some vendors will help for a fee.

Once set up, a Linux based PBX will save you money, not cost you licensing fees, and you do not need to go down that path of constant Cisco certification. You know, where you must test every two years to keep your certification. Testing that forces you to spend thousands of dollars to only understand one proprietary protocol. If you want a phone system that works, and works well, look to Asterisk and Linux for the answer.

Sure you can still use your Cisco 7960 phones if you want to fake out others, making them think you are running a Cisco Call Manager based system. Go ahead, I won't tell, will you?

Monday, July 20, 2015

Drozd BB Gun - After a few years in storage.

                                                        The Baikal Drozd, One Great BB Gun

While cleaning out one of the far frung closets in the house, I noticed a plastic wrapped cardboard box buried high up on a shelf. Upon moving several items to get it down, I see a faded Baikal emblem on the box. Looking closer,I see that this is the Drozd BB gun made in Russia. This awesome BB gun was an impulse purchase many years ago.

While making extra money saving the world from hurricane ravaged flooded areas, and placing radio and telephone gear around the Gulf Coast region of the United States, I found ways to spend my overtime pay. One item that allowed me to spend more than I would have thought was the Baikal Drozd. This was the original model, a yellow and black plastic and steel BB gun that had an electronic trigger and motorized feed mechanism. A local pawn shop had sold these for $200 each. One was placed on the wall, for all to see.

This particular store sold more ammo and firearms than they took in pawning. The local police department was known to place orders through them as well. This yellow and black contraption seemed to get picked up a lot, but placed back on its perch on the wall. I finally asked about it one day, and held it in my hands. I was told that this was the easiest full auto device to get your hands on. Being in a state where full auto weapons were hard to come by, this sounded like it could be fun. The saleman said this was CO2 powered and fired BB's at up to 600 feet per second.

Two slide switches are on this gun, one on each side. On one side is a selector for: 1, 3, or 6 round bursts. The switch on the other side selects: 300, 450, or 600 BB's per minute. With an electrical trigger and feed mechanism, this model runs on 6 AA batteries. The unit can be "dry fired" and makes a low sounding clack when it would be shooting BB's. The barrel is rifled steel and a warning in the manual says to only shoot lead BB's through it.

Having the $200 burning a hole in y wallet, I decided to get one. However, the one on the wall seems to have some dirty grime from the number of people pawing over it. The yellow frame has the dark marks of dirt and scratches on it. I ask for a new one, in the box. A few minutes later and I have a new Drozd. Taking it home I realize I need to find my CO2 cylinders. This takes normal 12 gramm cylinders like other guns I have. The magazine is made of heavy steel with only one plastic cover on the bottom.

With the one included magazine loaded with 30 BB's and a CO2 cylinder, I place this assembly into the Drozd. I take aim at a piece of wood in my back yard. Along with the clack I get the wizzing of BB's out of the rifled barrel. This things zings BB's pretty fast. It is also pretty loud. A few bursts later and 30 BB's are gone. The piece of wood is flipped around and tore up into match sticks. This is a fun "toy".

Going online, i realize I need another magazine, and any other options it can take. At this point I realize that this futuristic pistol came with a plastic press in buttstock. This is a two piece unit that just slides into the back of the Drozd pistol. This makes it two in one. With the buttstock the Drozd is a bit more controllable.

After ordering more magazines and some bulk fill modified magazines online, I start looking for an idea to get rid of the yellow look. This thing is really colored like a bumblebee. It is pretty ugly as it is now. My idea is to take it apart and paint it black. But paint has a bad record with me and plastic. After some searching online, I find others who dye the plastic with RIT brand dye. This is my next project.

After getting some black RIT dye and heating a large pot of water on the stove, I bring it all to boil. The RITS dye is stirred into the water, then the plastic pieces of the Drozd go in. I have read that you must keep the parts moving or else spots form in the plastic. The Drozd came apart easily, my concerns are, will it look good and go back together well? After about 20 minutes boilin this plastic mass in water and dye, I am satisfied in the deep black look of the plastic. It is now time to let the pieces dry.

Once dry the plastic looks even better. The RIT dye left a deep purple/black color in the plastic. After careful reassembly, the contrasting of died pieces and those that came in black looks great. A full function test is in order once it is back together. Adding in AA batteries and a loaded and charged magazine, a few shots are taken in the back yard. Everything works perfect, and now it looks cool. This thing looks like a space gun.

A short while later, a fake supressor, and muzzle brake arrive. These screw onto the threaded barrel and change the look without messing with function. Fast forward a few years later, and it still looks cool. This version has been discontinued and with imports from Russia being limited, these are great BB guns to buy and keep. They seem to hold their value and are built tougher than most BB guns. I recommend you get one for fun burst firing in your back yard.