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sccp protocol classes :?????

Viewing 15 posts - 1 through 15 (of 16 total)
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  • #39969 Reply
    RAKESH
    Guest

    As we know that SCCP was devised in addition to MTP layers for Non Circuit- related Signalling . However within SCCP again we talk of Protocol Classes .
    Class 0 & 1 are for Connectionless
    Class 2 & 3 are for connection -oriented SCCP messages .

    What exactly is the difference between Connectionless (Claas 0 & 1) and Connection Oriented (Class 2 & 3) within a ” Non Circuit -Related ” SCCP layer .

    Also can somebody give some exact example of a SCCP Connectinless & SCCP Connection oriented Siganlling cases

    #39970 Reply
    Hercules
    Guest

    the map use the cl service and the bssap use the Co service.

    in the so service, first make the signalling setup procudure, the transfer the signalling and then released it.

    here are the message in CO
    CR
    CC
    CREF
    RLSD
    RLC
    DT1
    DT2
    AK
    IT

    #39971 Reply
    NewGuy
    Guest

    What is the use of “AK ” & “IT” Messages ?

    Rgds

    #39972 Reply
    Rakesh
    Guest

    I still would like some clatrity as to what sort of “connection” gets made in Connection Oriented SCCP .

    #39973 Reply
    S.Vijay
    Guest

    SCCP CO – BSSAP Messahges

    SCCP CL – MAP Messages

    Rgds

    #39974 Reply
    Rakesh
    Guest

    What are the messages in the CO BSSAP .Pls clear

    #39975 Reply
    EROX
    Guest

    The helpful informations:

    With CO services the signaling point code of the receiver is determined by means of the DPC in the Routing Label, and the receiver distributes messages internally according to the local reference. No further addresses occur in the DT1, RLSD, and RLC….just the CR contains a receiver adress. Therefore, CO services can be used only if the MTP is able to determine the message destination from the DPC.
    With GSM, CO SCCP services occur at A-interface (BSS-SSS).

    Best regards!

    #39976 Reply
    Rakesh
    Guest

    I am still having one pesristent doubt. When we talk of the0 SCCP Connection oriented protocol and talk of the BSSAP messages these BSSAP messages are exchanged between what entities ? Please do claer as the SCCP Connection Oriented is really very confusing to me. Why do we need this SCCP CO protcol?? when we have the MTP routing for Circuit related sigannling & the SCCP CL for the non-circuit related signalling then where does the SCCP CO fit in between ? Somebody please

    #39977 Reply
    Scot
    Guest

    Hi Rakesh,

    Good question.

    Some inputs for you.

    BSSAP used between MSC and BSC.

    BSSAP is not only for Circuit also covers non circuit related things like LU/SMS.

    I am aslo looking forward to hear clear explaination for your doubts.

    Rgds

    #39978 Reply
    j.hunter
    Guest

    Don’t the BASSAP’s assist with MSC to Mobile DTAP messaging? How do the BSSAP’s relate to the associated TCAP-MAP messaging? Do they provide ISUP support?

    #39979 Reply
    Ashish Goel
    Guest

    Hi Rakesh,

    After some discussions wit my riends on ur q/s i have come to know that the SCCP connection oriented services are used for more more reliable connctions i.e. where high reliability is required such as LU etc. The CL services are use where not high reliability is required.

    #39980 Reply
    Scot
    Guest

    Hi Ashish,

    As you explained CO is providing High Relaibility and as welas POINT TO POINT with simple routing so speedier and communication happens between known destinations so no need for finding the destination.

    Idle situation for MSC-BSC Communication.

    Rgds

    #39981 Reply
    Nitin
    Guest

    What is the difference between DT1 and DT2..

    #39982 Reply
    Herman Syukur
    Guest

    Dear All,

    Any one have basic knowledge about sccp, can you help me to understand that.
    thankyou

    Best regard

    Herman Syukur

    #39983 Reply
    chandrachud
    Guest

    can any one give me information on various ss7 protocols?

Viewing 15 posts - 1 through 15 (of 16 total)
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