1. COMMON CHANNEL SIGNALING (CCS#7)

2. CONTENT 1)Introduction. 2)signaling. 3)Types of signaling.
4)Use of signal.
5)Transmitting part.
6)CAS & CCS7
7)Features of ccs#7 signaling.
8)The function of signaling are as follows.
9)CCS principle.
10)MTP & TUP.
11)Advantage of ccs7,Disadvantage.

3. Intoduction
In telephony , common -channel signaling (ccs), is the transmittion of signaling information on a separate channel from the actual traffic viz voice or data and more specifically where that signaling channel controls multiple data channels.

4. signaling Signaling is used between user and the network ,
or between two network Element to exchange
various control information.

5. TYPES OF SIGNALING Channel Associated Signaling (CAS)
Common Channel Signaling (CCS)
Signaling System Number 7(SS7) is a form of
Common Channel Signaling

6. USE OF SIGNAL The use of signal for controling communication.
The sending of a signal from the transmitting
end of a telecommunication circuit to inform a
user at the receiving end that a message is
to be sent.

7. TRANSMITTING PART Channel Associated Signaling： Transmitting path
Common Channel Signaling

8. CAS In CAS each and every speech channel is
associated with a signaling Channel. This means
for each speech channel a separate signaling
Channel is required.

9. CCS7 CCS7 is a message based ,multi-layer network to
network signaling system designed for fully digital
exchanges.
Voice trunk
Switch B
Switch A
Signaling link

10. Features of ccs#7 signaling
Internationally standardized.
Suitable for various communication services such as telephony ,text, data service.
High performance and high real ability for message transfer.
Features of ccs#7 signaling

11. Features of ccs#7 signaling
Signaling links always available
even during existing calls.
Transfer rate of 64 kb.
It is typical in digital network.
Features of ccs#7 signaling

12. The function of signaling
To set up a call.
To supervise the call.
To clear a call.
The function of signaling
are as follows

13. Higher signaling data rates. Optimum use of bandwidth.
Out of band signaling .
Higher signaling data rates.
Optimum use of bandwidth.
Reliability and flexibility.
CCS PRINCIPLE

14. The initial phase of ss7 consisted of two part
1)Message Transfer part-MTP(responsible for transferring message)
2)Telephone user part-TUP (user of messages)

15. MESSAGE TRANSFER PART (MTP)
The part responsible for taking these message from one network element to another network element is known as the message transfer part(MTP)

16. Telephone user part (tup)
The previous section explained the MTP. But who is the user who recevies ,sends and acts on these message ? ans is TELEPHONE USER PART. Those standard sets of message that were metioned previously are the standard TUP message that help to set up the call, to supervise and clean it.

17. ADVANTAGES OF CCS7 Higher signaling data rates(56kbps&64kbps).
Reliability and flexibility.
Faster call set-up time.
Time saving.

18. DISADVANTAGES
The error rate of the common channel signaling system must be very low.
The SS7 systems that every transnational corporation produces are having ome problems in compatibleness.

19. ADVANTAGES OF CCS OVER CAS
Compared with Channel Associated Signaling, Common Channel Signaling has many important advantages
Information can be switched between processors much faster than in channel- associated signaling.
Faster call setup.
No interference between signaling tones by network and frequency of human speech pattern.

20. thankyou