Optic Multiplexer

pls any1 have answers to these questions?

1. the no 25 in hexadecimal is represented by wha decimal no?

2. how many input combinations would a four input logic gate have?

3. if B' = Y, what is Y equal to when B = 1? (note -B' means B bar)

4. the storage element used in dynamic RAM is a what?

5. multiplexers are often referred to as ?

6. in a system using several 1 kb memory devices, which address lines are connected to the memory chip?

7. the speed of light in a transparent material is ?

8.what kind of light is normally used in fibre optic systems?

1) 25 = 5*1 + 2*6 = 17
2) 2 power 4 = 16
3) 0
4) ??
5) data selectors, MUX, digital switch
6) LSBs
7) 3 * (10 ^ times the refractive index of the material
monochromatic

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RAD Fiber Optic add/drop Multiplexer With OP-M/MM/SC/85 Inputs OP45B28XACRSC85LD $2231.25 RAD Fiber Optic add/drop Multiplexer With OP-M/MM/SC/85 Inputs OP45B28XACRSC85LD

Cisco 15454-32-WSS= Multiplexer $16171.99 15454-32-WSS= 15454-32-WSS= Wavelength Selective Switch Multiplexer Card 2 2 x LC Network 32 Data - C-band 5 Year Limited 15454-32-WSS= Wavelength Selective Switch Multiplexer 2 x Fiber-optic cables (2m LC/LC) The Cisco ONS 15454 MSTP offers a fully integrated reconfigurable optical add/drop multiplexing (ROADM) solution, shown in Figure 1, for delivering any wavelength to any location in a metro or regional network. The ROADM cards are part of the Cisco ONS 15454 MSTP intelligent DWDM architecture engineered to reduce DWDM complexity and speed the deployment of next-generation networking solutions. Cisco Cisco Systems, Inc Fiber Multiplexer Not Applicable Plug-in Module www.cisco.com

Multiplexer $66.91 In electronics, a multiplexer or mux (occasionally the terms muldex or muldem are also found for a combination multiplexerdemultiplexer) is a device that performs multiplexing; it selects one of many analog or digital input signals and forwards the selected input into a single line. A multiplexer of 2n inputs has n select lines, which are used to select which input line to send to the output. An electronic multiplexer makes it possible for several signals to share one device or resource, for example one A/D converter or one communication line, instead of having one device per input signal. On the other end, a demultiplexer (or demux) is a device taking a single input signal and selecting one of many dataoutputlines, which is connected to the single input. A multiplexer is often used with a complementary demultiplexer on the receiving end. An electronic multiplexer can be considered as a multipleinput, singleoutput switch, and a demultiplexer as a singleinput, multipleoutput switch. The schematic symbol for a multiplexer is an isosceles trapezoid with the longer parallel side containing the input pins and the short parallel side containing the output pin. Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 72 Publication Date: 2010/01/12 Language: English Dimensions: 5.98 x 9.01 x 0.17 inches

Digital Link Multiplexer E3 DL3202 $2323.2 Digital Link Multiplexer E3 DL3202

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Cisco Mux/Demux Module With Osc Multiplexer 15540MDXD08A0 $2719 Cisco Mux/Demux Module With Osc Multiplexer 15540MDXD08A0

RAD T3 Fiber Multiplexer AC Power OPT3BACBX $2054.55 RAD T3 Fiber Multiplexer AC Power OPT3BACBX

Nortel Optical Multiplexer/Demultiplexer (Omx 4CH) NT0H30CA $580.55 Nortel Optical Multiplexer/Demultiplexer (Omx 4CH) NT0H30CA

IBM Multiplexer Expansion Module For BladeCenter HT 42C3723 $474.26 IBM Multiplexer Expansion Module For BladeCenter HT 42C3723

POTS Fiber Multiplexer FXS/FXO over fiber multiplexer voice fiber optical multiplexer setup, fibre voice optic mux

VoIP Security

This issue is increasingly relevant, as there are offers operators to deliver their business services using SIP trunks, but this is so long and wide, and therefore it is important that we stop talking about this kind of technology. On the one hand the operators no longer need large infrastructure of fiber optic multiplexers and stuff to provide the services, as anyone with a public IP you could provide the service. But it is important to see the conditions under which this service is provided so you have the reliability and safety we expect from this type of product. Availability: In this sense the availability of telephone service depends on the internet-based Internet link. So you have to be very careful with the procurement and installation of this type of service, especially if utilized to supply vital services to our businesses. Although there are operators that will deliver both packaged, both Internet access and telephony on the same wire, which makes it easy to provide adequate availability. Flexibility: In this he wins a lot, because with one call, you can easily have more capacity. In that sense the ease of increase or decrease the capacity contracted operator is very simple and may have varying capabilities, so that in times high demand. You could have more lines virtually in low season and low season cost savings without sacrificing availability in high season. Compatibility: With conventional technology (TDM), the installation of a new E1. Required for the presence of the geniuses of telephone plants, especially if E1 was provided by the operator at the very outdated format DTMFR2 MFCR2 or popularly known as R2, that IP is much simpler, although it also requires something knowledge, no single operator depends on a single supplier or to succeed in the task. Security: A conventional lines like those involved very easily, almost assured that we have that the lines were not intercepted is the confidence we have in the physical security of the cabinets of the operators. In the case of E1 is required more technology but it is still possible. But in the IP world, intercepting a call is as easy as the intercept data as it travels as data calls, and if we do not review very well the configuration of the sip trunks operator, we are easily spoofed, fooled, recorded or stolen. Hence we should maintain voip security. Although there are technologies that allow IP voice is much safer than conventional voice even get to have military-grade security. This requires not use sip trunks simple but complex and expensive configurations, not always the operator will be willing to assume, but if we must be willing to demand. Quality: VoIP technology allows voice quality far superior to the conventional voice and do not have to be limited to traditional conventional 64K voice, but this requires properly configure the interface and have a good-quality Internet Manufacturers are even talking about high definition voice, since voice over IP audio brings a lot more detail in a frequency range higher than conventional voice. But keep one thing in mind maintain voip security by consulting your voip service providers. Because now days voip is uses for a lot of illegal activity. Costs:- This topic is very interesting to consider because the costs and opex and capex side of the operator or the user side are much smaller and this should be reflected in benefits to users. But in this case we must not forget that the cost of bandwidth used for this service must be included in the equation, and it may be that in countries like ours where the Internet is so expensive, this cost reduces the profit on the previous technology. How would an ideal mount: This is a question many will be after reading all these comments, so we planted a scenario in which both covered the implications for operators and users.First we will state the minimum requirements should be based telephony services on the Internet, the least you expect from a new technology is offering us the same as the previous technology. Caller ID: To most people this may seem obvious, but with the ever increasing number of illegal operators and links between operators of poor quality, is increasingly common that you get a call to your cell phone you can not return using caller ID that is recorded on your phone. This should not happen, but it is increasingly common, especially in long distance calls. On this afternoon to speak out are the regulators, as it is fundamental for the Eradication of illegal long-distance service. Connection to emergency services: This is one of those things in which we remember when it is too late, if we replace our traditional telephony service provider which is supposed to offer us more for less, we should by the lines of that provider to call the police, 123, 911, firefighters, Red Cross or any similar number, if necessary, or else the operator says clearly in his contract, which does not provide such services. This issue has been aired in some courts in the world, with more than one user has had unpleasant surprises in this regard, though it requires police or an ambulance.Dialing to any operator or destination. In Colombia there is already a very wide range of operators offering long distance, some more legal than others and why the market has been classified by colors white, gray and black. Especially in these last two very tempting offers we can find the most common international destinations for Colombians, which include the United States, Venezuela and Panama or even Comcel, which is ranked as the destination with the highest demand of the country. But what if we want to call Burundi, or watch the fort. In this case there are two possibilities, it is not possible, or is more expensive than our incumbent. Since the illegal operators and emerging, usually have problems with some popular destinations, but legal operators are obliged to offer all destinations. Availability: This is another point that people take for granted. That raises your home phone and once you can dial tone, this is not always in VoIP telephony and mark where the call can be made. In this regard the proliferation of illegal operators to echo that this indicator is deteriorating significantly. But the government facilitates the creation of new operators to cost not so high, enables people to consume a consistent manner of minutes illegal, opt for legal options at similar prices. Access to additional services. Our current operators or voip operators offer a range of additional services to the voice we are accustomed to use and we do not realize that it takes until we do not. within these services are those beginning with one like the 113 or 117, call services such as reverse pay lines may not work in many of the new entrants or incumbents new services, or the call lines free has cost as a normal call. ALI: This point is unknown by most people, but is of fundamental importance. The symbol corresponds to the standard used by telephone companies to transmit the address of where you are calling, this information is not public access, is used for services such as 123 to know where it comes from the call, is also used by the police to trace calls, so usually the common people will not have access to this information, but if we need help if we would like the fire we could find. So far, the cellular and VoIP technology have been the weak point of the protocol and voip security, but in the case of phones, the first approach was to deliver the position of the three nearest towers, and would have a vague idea where came the call, the next version for mobile phones is to use GPS information to the phone. But this only works with phones more expensive. In the case of VoIP there are several proposals, but in this country there is no rule about requiring the VoIP operator to deliver that information, and illegal operators do not have the slightest intention of giving this information. With this we are just like the technology that is expected to replace, but lacks the additional ingredient for wanting to replace the technology. Security. Security or voip security in this case has two points to consider. On one side is not allowing our calls are recorded, this is easier and cheaper to implement than the conventional voice when choosing the right technology and configured the right way. And on the other we will not be supplanted or to be certain of the identity of our partner that is also easier to implement than in conventional technology, which does not have a secure ID system, beyond the trust that the wiring was not altered. Fidelity. Something that we're used to is that the audio quality of a phone is not exactly the best, but this in the voice over IP can be changed easily, because the voice is not limited by the paradigm of the 64K and may be better quality as the current codecs offer higher quality conventional voice. Flexibility. With these technologies, the service installation or modification of its features is a very easy process and the companies will be very easy to use equipment that will enable SBC to have several operators, redundancy, fault tolerance without any problems. Additional Services. Technologies such as unified messaging and unified communications are advancing slowly but surely in the corporate world, and soon the players will join this wave and we ordinary mortals have access to this technology, this together with the triple or quadruple play services will make "core" of our operator will receive much more than just voice. So due to illegal and criminal activity with voip it is necessary to maintain voip security

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