Q & A

Questions and Answers concerning particular and often very detailed issues given without introduction.
Comments, questions are of course welcome!!!

Q: Why AAL2 on Iu interface needs ALCAP and AAL5 does not need this signaling protocol ?
A: AAL5 is using PVC configured by O&M, hence there is no need to establish, release or maintain this connections. AAL2 is not using PVC but VC/VP which need to be established, released and maintained by separate signaling protocol i.e. ALCAP.

Q: What is the meaning of PDU and SDU and what is the difference between them ?
A: PDU is Protocol Data Unit and SDU is Service Data Unit. Difference between them and their role should describe following figure
PDU and SDU illustration

Q: What means NNI and UNI ? This two terms can be seen together with SAAL layer.
A: NNI means Network-to-Network Interface also known as Network-Node Interface. UNI means User-to-Network Interface.

9 comments:

  1. I have read all your articles. I wonder why you can write them. They are easy to understand and accessible. They help me much too. I'm thankful if you can upload more posts later. Thanks for your sharing.
    Hướng dẫn đăng ký gói cước B30 của VinaPhone, Hướng dẫn đăng ký gói cước Mimax sinh viên của VinaPhone, Đăng ký gói cước Mimax50 VinaPhone, Đăng ký gói cước 3G VinaPhone 1 ngày chỉ 5K,7K,10K

    ReplyDelete
  2. I really loved reading your blog. It was very well authored and easy to undertand. Unlike additional blogs I have read which are really not tht good. I also found your posts very interesting. In fact after reading, I had to go show it to my friend and he ejoyed it as well! currency converter app
    currency converter box free online

    ReplyDelete
  3. Thanks for the post, visit this site because it has so many applications and information needed for everyone, share it to more people to know more, thanks a lot.
    Product discount master app, Discount master, best autoketing

    ReplyDelete
  4. I accidentally saw your post and it attracted me from the first few seconds, it was excellent, hope you have more successful posts.
    madalin stunt cars 2 games play now, tomb runner mobile free online games, apple shooter good game for kids

    ReplyDelete
  5. I enjoyed it, thanks for posting it, I hope this post of yours will be more appreciated by it really excellent.
    Wheelie Challenge 2 games to play, Heroes Of The City Jigsaw unblocked, Frozen Christmas Surprise Gifts games for school kids

    ReplyDelete
  6. The article was great, I accidentally saw it and I was really attracted to it, hoping it would be well known.
    Happy Glass games online, Stickman Warriors free online games, Cooking Christmas Traditional Food games for kids

    ReplyDelete
  7. Pretty good post. I just stumbled upon your blog and wanted to say that I have really enjoyed reading your blog posts. Any way I'll be subscribing to your feed and I hope you post again soon. Big thanks for the useful info  test sip trunk

    ReplyDelete