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28th September 2003 at 08:37 #36531amberish trivediGuest
i want to talk something about signalling
what is difference betwemm r2 and ccs7 siganlling
anyone can explain or give me some document on that
mailnly i am inrerested in R2 singalling
thank you28th September 2003 at 13:08 #36532Naveen.Guest
well one major diffr is that R2 is CAS, channel associated signalling, while C7 or CCS7 is common channel signalling. One time slot in C7 signalling can cater to some thousands of channles,unlike R2 where each channel will have one signalling timeslot for it.
Hope this helps u.29th September 2003 at 07:07 #36533amberish trivediGuest
can u send me r2 signalling trace
i have all trunks which are working on ccs7 signalling
so i have no r2 trace
i want to clarify that in r2 also there is 16 timeslot for signalling and in ccs7 also 16 timeslot is for signalling
so what difference there in between
pls give me link or explore it
it is very urgent because my new assignment is on mfc r2 signalling29th September 2003 at 23:25 #36534agentorangeGuest
in SS7, anywhere in the channel ( except TS 0 ) can be used as signaling link which can cater to some 1052 circuits, whereas for the R2, it is fixed on TS 16 of every E130th September 2003 at 09:53 #36535amberish trivediGuest
what i want to clarify is that in R2 there is 16 timelsot of every el is dedicated for siganllign and from that 16 timeslot 4,4 bit is divided for 1 tch.
so in ss7 how dedicated signalling timeslot 16 or whatever it be is divided between 31 tch.
can u explain that
thanking you for ur reply9th October 2003 at 06:28 #36536SamikshaGuest
Do u have enough knowledge abt GSM channels, if yes—–If I have 3 freq in one cell then how is the TCH, SDCCH & CTRL channel config usig Combined and Non combined……
Waiting for U…..
Sami…9th October 2003 at 16:45 #36537amberish trivediGuest
i am giving u general idea because in tch,sdcch and ccch configuration u need not to think about no of frequencies.
Frquency will come in picture when u will put that trx in hopping or non hopping mode.
now there is 2 mode for control channel configuration:
As ur BCCh will be on 0th timeslot and other 7 timeslot will be TCH.
so here ur sdcch will be also on 0th timeslot with bcch+sdcch/4 mode.so it will share the timeslot 0 with bcch.
2)now in noncombined mode ur sddch will be on 1st timelsot and bcch will be on 0th timeslot and other 6 timeslot will be on tch.
so here bcch+sdcch/8 configuration will be made.
so here u dont need to worry about freq.
if still any doubt then tell me.
bye12th October 2003 at 17:54 #36538SunilGuest
This is in response with AXE BSC.
Can you explain a bit abt LAPD Concentration and mUltiplexing.
Sunil15th October 2003 at 12:52 #36539Harshvadan JaniGuest
Can anybody tell me what is Concentrated signalling, Unconcentrated signalling & Multiplex signalling16th October 2003 at 18:59 #36540DS1PimpGuest
R2 is in-band CAS signaling while C7/SS7 is an out-of-band common channel. R2 uses ch 16 (or TS 15) on every E1 for all signaling/call setup/tear-down for that particular E1. It also uses MF or DTMF for the setup. C7/SS7 uses 64Kbs or 56Kbs channel that can be part of the E1/T1(i.e. ISDN or F-Links) or on a seperate facility(A-Links). All signaling b/w two switches can be done on that same link (thus can handle thousands of call setup on one channel). R2 implementation also varies from country to country(how they pattern the forward and backwards tone for instance)