- This topic has 15 replies, 1 voice, and was last updated 7 years, 4 months ago by Anoop.
13th October 2004 at 09:09 #39969RAKESHGuest
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 cases14th October 2004 at 01:21 #39970HerculesGuest
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
IT15th October 2004 at 12:57 #39971NewGuyGuest
What is the use of “AK ” & “IT” Messages ?
Rgds16th October 2004 at 18:17 #39972RakeshGuest
I still would like some clatrity as to what sort of “connection” gets made in Connection Oriented SCCP .17th October 2004 at 00:58 #39973S.VijayGuest
SCCP CO – BSSAP Messahges
SCCP CL – MAP Messages
Rgds15th November 2004 at 06:44 #39974RakeshGuest
What are the messages in the CO BSSAP .Pls clear15th November 2004 at 08:00 #39975EROXGuest
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!24th December 2004 at 07:14 #39976RakeshGuest
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 please7th January 2005 at 13:22 #39977ScotGuest
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.
Rgds9th January 2005 at 02:18 #39978j.hunterGuest
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?10th January 2005 at 11:23 #39979Ashish GoelGuest
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.10th January 2005 at 11:51 #39980ScotGuest
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.
Rgds28th November 2005 at 10:45 #39981NitinGuest
What is the difference between DT1 and DT2..29th November 2005 at 00:22 #39982Herman SyukurGuest
Any one have basic knowledge about sccp, can you help me to understand that.
Herman Syukur30th November 2005 at 11:36 #39983chandrachudGuest
can any one give me information on various ss7 protocols?