what is c2 signalling

Hi amberish,
In C7 we can use any TS for signaling. But normally we use TS 16. We can also use more than one TS on the same physical link. The allocation of TS & CIC values on PCM is done mutually between both the nodes

Dear amberish
In C7 the TCH is identified by CIC. The CIC values are unique between two PCs. The C7 messages between 2 PCs carries CIC value for identifying the TCH for which the signaling info is. also the messages has Sequence Nos(FSN/BSN) for flow control. The signal data is in packet form. Incase of R2 the signaling info is transmitted strictly at the momemt of time when it is the turn for that TCH. More info on layer1/2 can be found on pt.com. However feel free for any thing.

To Amberish trivedi ,

For R2 :-

In R2 TS-16 used for carrying Line Signalling.That is for in forming the other party about a particular ckt for IDLE,SEIZURE,ANSWER,CLEAR FORWARD/BACWARD Status.If you know PCM Baics …In each frame of 256 Bits 8 bits in TS 16 is used for Line Signalling Interaction for Two TS.

Lets Say TS-N.(N=any 1 TO 15)

In TS-16 at a time Line Signalling info for TS-N and TSN+16 will be carried out.In a single Multiframe all the TS will be having a chance to send Line Sigfnalling Info.

Lets Say using Line Signaling one of the channel is seized for Traffic.

Then the Call Originating Node will immedatly connect Register Signalling Devices in that Channel same in the other side also.

Then The register signals will carry info abt A-No,B-No,Sub Cat.

As per this definition each PCM Nedds a dedicated TS16 for Line Signalling.And huge amount of Register Signalling Devices which should be equal to the no of Voice Traffic Channels.

Becoz the register devices are also used while the call is going on to carry DTMF Tones And Etc.

For 10 PCM You need 10 TS for Sync +10 For Line Signalling.So you will be having only 300 Circuits for Voice Traffic and U need 300 Rehister Signalling Devices.

C7 :- Theoritically One TS Cann carry signalling in fo for nearly 4096 Circuits.Practically for 1000 Circuits.

So for 10 PCM :-

10 For Sync +1 For Signalling + 309 for Voice.

Due to the digital format of C7 Signalling you dont need any other things.It will carry all the related infos for Call Processing.
Thing the valume in huge like 25 PCMs.

Rgds

Sunil

kindly send me some call flow in r2mf,v5.2 & ss7 signalling & the notes to study the r2mf signalling tracer
thanks & regards

Answer Bid ratio = (Number_of_answered_calls/Number_of_Bids) * 100

Answer Seizure ratio = (Number_of_answered_calls/Number_of_siezure) * 100

where
Bids = Call attempts
Siezures = Attempts which got/sieze the connections
Answered = Attempts which got the connections and anwsered.

Can anyone help me to provide the details of all Group A, B, I & II with describtion.

Hi ajay aggarwal,

Call Flow – If it is voice call then read about C7-ISUP Protocal Messages IAM,ACM,ANM,REL,RLC.

How to configure C7 Link – More depends upon the Type of Switch/Equipment you have.But some common things…Signaling Poin Code-SPC(OPC & DPC ),Signaling Link Code…and the Hardware defintions in your Equipment.

Rgds

Scot