NGN Introduction Soft Switching
Claudio
Claudio FiorentiniFiorentini Country Manager Country Manager Italy
Italy
Francisco Prieto Francisco Prieto
NGN Solutions Manager NGN Solutions Manager EMEA
EMEA
Agenda
• Evolution from TDM to NGN
• UTStarcom Architecture
• Tiscali IOT environment
• Tiscali UTStarcom Solution Topology
• NGN UTStarcom Solution Benefits
Traditional Telephone Networks
• Commonly referred to as PSTN.
– Public Switched Telephone Network.
• PSTN Network composed of:
– Access devices.
– Switching.
– Transport.
Access Switching Transport Switching Access
Generic Switch Architecture
Signaling
Call
Processing Switching
Matrix
Proprietary, Closed Environment
What is a Soft Switch?
Voice switching platform built in a distributed architecture, based on open standard interfaces between its components and supported by actual TDM (PDH/SDH) and packet switching transport networks (IP).
• Performs the same functions as legacy PSTN Switches, but in a more flexible, economic and open architecture.
• Softswitches leverage the actual data network
technologies for transporting voice media and signaling.
– Voice – VoIP (RTP/RTCP).
– Signaling – MGCP, MEGACO, SIGTRAN, SIP, SNSP, etc.
Legacy - NGN Evolution
Signaling Call Processing Switching Matrix
LE LE
SS7 SS7
Voice Voice
E1’s E1’s
Signaling Call Processing
LE LE
Voice Voice
SS7 SS7
E1’s E1’s
MG MG
IP
MEGACO MEGACO
VoIP (RTP)
VoIP (RTP)
Legacy - NGN Evolution
IP
Signaling
Call Processing
LE LE
SS7 SS7
Voice Voice
E1’s E1’s
MG MG
IP
MEGACO MEGACO
VoIP
(RTP)
VoIP
(RTP) SIGTRAN
(M3UA)
Legacy Switch vs. Softswitch
Signaling
Call Processing
Switching
Proprietary, Closed Environment Open, Standard Interfaces
Signaling
Call Processing
Media Gateways
• Monolithic
• Proprietary
• Expensive
• Dependant
• Distributed
• Open
Interfaces
• Scalable
• Vendor
independent
• Convergence
Distributed Softswitch Model
Signaling Gateway
(SG)
Media Gateway Controller (MGC)
Media Gateways
(MG) SIGTRAN
MGCP MEGACO H.248
Packet Interface
PSTN
mSwitch Architecture
• Logically, mSwitch architecture consists of 4 layers:
IP Network
Access Layer Access Layer
(Gateways) (Gateways) Control Layer Control Layer
Service/Application Layer SNMS/mBOSS Layer
mSwitch R6 Network Architecture
TISCALI IOT Environment
SSP Cagliari
Micro VAX
iUMG A
CS-P/CS-G/CPS PC=0-144-4
IMT CIC 1-31
Link TS16
LSET x
H.248 Standby
Active
RTP Standby
Active
StandbySIGTRAN
Active
Link TS16
LSET x
SSP Rome PC=0-27-7
Micro VAX
SIGTRAN H.248
RTP
Link TS16
LSET x
SSP Milano PC=0-28-0
Micro VAX
iUMG B
SIGTRAN H.248 RTP
IP
iUMG C
IMT CIC 33-63
IMT CIC 1-31 IMT CIC 33-63
IMT CIC 1-31 IMT CIC 33-63
SCP
SRF PC=2-87-0 PC=x-yy-z
SCP
PC=0-63-7
RAS Dial up
E1 PRI
SRF PC=1-460-1
TISCALI
UTStarcom Solution Topology
IP transport network
Other Carriers TDM Switches
C-TG iUMG
N POPs in total
(> 400 DPCs, > 500 links)
CS-P
SS7 F links
SS7 F- links IN SCP
INAP/E1
High Density POPs
New Low Density POPs
SG (SEP)
SS7/M2UA
SS7/M3UA
H.248 CPS
(Milano CO)
IN SRF
ISUP/E1
CS-P
IN SCP
INAP/E1
SG (SEP)
SS7/M3UA
CPS
(Roma CO)
IN SRF
ISUP/E1
H.248 SS7/M2UA
Primary connections
Secondary connections Other Carrier
TDM Switches
iUMG
SS7 F links
{Milano CO and Roma CO are two geo. Redundant sites. Each can handle the entire network.}
Other Carriers TDM Switches SS7 F links
iUMG
iAN8000 MSAN iAN8000
MSAN
UTSI IN SCP UTSI
IN SCP
Other Carriers TDM Switches
Benefits
• Increase the granularity and power processing distribution of the Network – Low density interconnection
– Signaling, Media and IN capabilities distributed or concentrated depending on carrier needs
• One Network
– Reduction planning and engineering time – Reduction maintenance and operation costs
• Transport
– Eliminate the need of internal E1 – Reduction bandwidth needed
– Reduction maintenance and operation costs
• Organization
– UTStarcom solution implemented in a common platform allow to focus on services instead of networks
