Huwebes, Pebrero 9, 2012


Asynchronous Transfer Mode (ATM)


ATM is an evolution from many other set of protocol, it is member of the fast packet switching family and this is what we call cell relay. It is called asynchronous because it is designed to carry any form of traffic and enables the traffic to be delivered asynchronously to the network. When traffic in the form of cells arrives, the cells are mapped into the network and transported to the next destinations.


They are using a combination of TDM or time division multiplexing with cells using reassigned slots and statistical TDM if there is no cells arrive. It uses virtual circuits, the permanent virtual circuit (PVC) and switched virtual circuits (SVC) to handle the connection. These two circuits are important factor for ATM because it will fix the size of cells employed and carry the traffic of the end users.


ATM also used to integrate voice, data, video and multimedia traffic on a single backbone network. The standards of voice, video and data have different standards and their data network is also separated when it is transmitted.


ATM gives excitement to the users because it has a higher bandwidth that can support their systems to overcome the problems that they encountered from the past technology. Obviously the capacity of ATM to give a good performance to the multimedia application is much different from the technique that they are using before because it is capable of higher bandwidth.
The speed of ATM at the start of using this is about 1.544 Mbps, today it already have 622 Mbps. As we observe the difference of the two is very far, the increased of the speed is now enough to convince the user to use ATM. But even the speed increased to much higher capability, they still find ways to reach 2.488Gbps for the future application. In order to inform the people that they reach their demands in using ATM is done by QoS capability.


For layer architecture ATM is different from the OSI, ATM only uses two layer. The two layers are the data link layer and the physical layer. ATM is said to be designed to run on a physical medium such as SONET.
We need to know the importance of ATM because it gives many benefits to the users. One of these benefits is the high speed communication, this is very important so that the needs and wants of the users will easily serve. To get this high sped communication the fast hardware-base switching is also very important because the proper switching help to increase the speed of communication.


The disadvantage of ATM is that it can cause much confusion because of their name, it is called asynchronous but it is related to synchronous transmission and their specification has similarities. It needs also many protocol points and interfacing so that it can support the older legacy system.


Reference: Broadband Telecommunication Handbook: 2nd edition by Regis Bates

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10 komento:

  1. Jed PalazueloPebrero 9, 2012 nang 7:36 AM

    Nice Post here Francis. however, i want to sight an error in your second paragraph. ATM is using combination of TDM or time division multiplexing with cells using "preassigned slots" and not "reassigned slots", also with statistical TDM not "if there is no cells arrive." but "to whatever slot is available or needed.

    thanks for the post.

    TumugonBurahin
    Mga Tugon
    1. francis rayPebrero 9, 2012 nang 6:21 PM

      thank you for the comment, sorry i got incorrect info. yoyr right that is exactly a preasigned slots.

      Burahin
  2. Matt DiestroPebrero 9, 2012 nang 9:30 AM

    which is better frame relay or the ATM?

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    1. francis rayPebrero 9, 2012 nang 6:45 PM

      for me ATM is better than frame relay because it can give more benefits to the users.

      Burahin
  3. kingPebrero 10, 2012 nang 4:42 AM

    one disadvantage of using ATM is cost and it will decrease with time because of higher bandwidth tnx for that info keep it up.

    TumugonBurahin
  4. RhoneilLuayon(Gothic)Pebrero 10, 2012 nang 8:17 AM

    now i see why ATM is popular to the bussiness industry Because ATM is designed to be easily implemented by hardware (rather than software), faster processing and switch speeds are possible. The prespecified bit rates are either 155.520 Mbps or 622.080 Mbps. Speeds on ATM networks can reach 10 Gbps. Along with Synchronous Optical Network (SONET) and several other technologies, ATM is a key component of broadband ISDN (BISDN).

    TumugonBurahin
  5. AldonPebrero 10, 2012 nang 11:13 PM

    Now i know why ATM is designed to carry any form of traffic and enables the traffic to be delivered asynchronously to the network.

    In Small Fixed cells ATM is always on the move. that is why ATM produces less traffic..

    Thank You Francis..

    TumugonBurahin
  6. keithPebrero 10, 2012 nang 11:19 PM

    So ATM is used to integrate voice, data, video and multimedia traffic on a single backbone network. thx for the info

    TumugonBurahin
  7. Abe Joseph (IWOKZ)Pebrero 12, 2012 nang 5:20 PM

    We need to know the importance of ATM because it gives many benefits to the users. One of these benefits is the high speed communication, this is very important so that the needs and wants of the users will easily serve.

    TumugonBurahin
  8. PAULPebrero 12, 2012 nang 11:33 PM

    ATM is very useful on the modern days for it have given us more fast and reliable ways of communication.

    TumugonBurahin

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