1. PTCL Training & Development

2. SIGTRAN Protocols…. SIGTRAN:
SIGnaling TRANsport to carry SS7 signals over the Internet
PSTN’s signals are being carried over IP network after converting from SS7 to IP signals
Underlying transport vehicle is SCTP (Signaling Control transmission Protocol) to carry SS7 over IP
PSTN signals SS7 are transmitted to SG (Signaling Gateway) which in turns converts SS7 into SIGTRAN signals
SIGTRAN signals are sent to a SoftSwitch or to next Signaling Gateway SG

3. SIGTRAN Protocols…… Basic function of SIGTRAN:
To transport PSTN (SS7) signals over IP keeping the functions & requirements of PSTN
Idea is to transport ISDN(Q.931, ISUP, SCCP etc) messages between IP nodes (SG, MGC, MGW) or to an IP-based database
To provide signaling capability for Call Management and to provide media paths for IP real-time traffic
Real-time traffic can be Voice, Music, video which needs instant transportation

4. SIGTRAN Protocols Model Common Signaling Transport SCTP
Upper Layer protocols
Adaptation Protocols
Redefines new
Transport service
Common Signaling Transport SCTP
Carries SS7 signals
over IP runway
Standard IP protocols
The Real IP Standard
Transport means
Adaptation protocols-to make TCP/IP look like an upper layer protocols MTP3 (which are MTP1, MPT2, MTP3 all SS7 signals)

5. Integration of SS7 & IP protocols
ISUP
SCCP users,
RANAP, TCAP etc
SCCP
MTP3
Q931
MTP2
M2UA
M2PA
M3UA
IUA
SUA
2904
3565
2905
9900
1401
SCTP IP

6. SIGTRAN benefits…..
Ease of deployment: No need to distrupt SS7, future enhancements are transparent
Better Efficiency: Using IP over SDH and IP over fiber can achieve much higher throughput
Flexible architecture: IP signaling is flexible than TDM-based legacy networks
Enhanced Services: Implementation of a core IP network facilitates a variety of solutions and value added services (VAS)

7. All Signaling Protocol scenario….
SIP-T/BICC SS SS
SIGTRAN
SIGTRAN
H248
H.248 SG SG
H323 /SIP
SS7
SS7 E1 E1
TMG/UMG
PSTN
PSTN
TMG/UMG
AGW
SIP Phone
Phone B
Phone A
MAP
phones
GSM MSC
* SIP-T: SIP for Telephone

8. Protocol abbreviation used….
ISUP—ISDN User Part
SCTP– Stream Control transmission Protocol
RANAP– Radio Network Access part
TCAP– Transaction Capability part
MTP1, 2 3 – Message Transfer Part 1, 2 ,3
M2UA, M3UA – Message 2 User Adaptation, Adaptation 3
IUA– ISDN User Adaptation
SUA– SCCP User Adaptation
SCCP– Signaling Connection Control Point