GLOBAL NETWORK SOLUTIONS
Softswitches equipments in
NGN Architecture
and related services
ITU-BDT Seminar on Network Evolution
Sofia, Bulgaria 21-24 January 2003
Gianluca Renoffio
Chief Solution Architect
Product Management & Planning
gianluca.renoffio@italtel.it
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
Changing Scenario (1)
Telecommunication market
‰ period of dynamic evolution
‰ increasing demand to deploy innovative services
‰ technology constantly opening up new horizons
‰ growing and developing in terms of quantity and quality
‰ relationships, information and business less and less
dependent on the physical location of the people involved
Crucial Point: opportunity to interact by exploiting the wide range of
The Digital
Society
available means of communication,
taking
advantage of the ability to
integrate CONVERGENCE with Multimedia Revolution
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
Changing Scenario (2)
Convergence means
‰ New industrial environment
ƒ New professions (network operators, service providers, content provider
access providers, hardware supplier, tool makers, distributors…)
ƒ New multiform actors (system houses, manufactures of final products
and systems…)
ƒ New various marketing means, tools and prices (embedded software,
role of Internet, price from “sold” to “free of charge”…)
‰ New user’s expectations and possibilities
New Business Models and New Relationships between different
actors are arising
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
A New Business Model …
CS
Consumer
Consumer
Broker
Broker
Provides
CB
Enrollsfor
for
Enrolls
and
and
consumes
consumes
services
services
Service
Service
Provider
Provider
SB
Offersany
anyof
ofaa
Offers
Varietyof
of
Variety
services
services
RB
Retailer
Retailer
CR
CN
Provides
location
location
information
information
Providesthe
the
Provides
contactpoint
pointfor
for
contact
theconsumer
consumerand
and
the
for
the
SP
for the SP
NB
RN
SR
SN
Network connectivity
connectivity provider
provider
Network
Delivers the communication services that transport information
Delivers the communication services that transport information
(controlPlane
Planeand/or
and/orUser
UserPlane).
Plane).The
TheService
ServiceControl
ControlInformation
Information
(control
can
be
Transported,
depending
on
the
business
application
can be Transported, depending on the business application
Source: ETSI
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
… and New Relationships
Network Technology
Circuit based Packet Based
Convergent
High
Multi Service
Middleware
Medium
Intelligent
Network
Low
Vertical
Centralized
Distributed
Portal
Distributed Processing Environment
Service Assurance
Service Model
Horizontal
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
Telecommunication is …
A strategic industry with impact on:
‰ Economy
Growth market in different areas not
equally distributed neither in type nor in
geography.
‰ Society
New services, application and content
will create new market and new
approach to life: will create the
Information Society with …
‰ Technology
Multi access convergence platform
(interactive digital TV, 3G mobile, PC at
home …)
Broadband (open platform for
convergence, Quality, Security …)
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
NGN Network Reference Model
Management
Layer
Functions
Service /
application
Layer
Control
Layer
Media
Layer
Service Selection
& Routing
O&M
Call Control
& Signaling
Media Processing
& Switching
Service Determination,
Number Translation, Call
Routing
PSTN and Packet Signaling,
Call Control, Device Control
Echo Cancellation, Voice
Coding, Audio Processing,
Bearer Channel
Adaptation/Switching
Characteristics
No Call State,
Database Driven
Call State, Protocol
Stack and State
Machine Driven
Resource State,
DSP and Data Flow
Driven
The NGN is the Key to open this “Innovative Place”
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
Multi Service Solutions
Networks point of view
TDM
endpoints
IN
services
TDM
access
IP
endpoints
TDM
access
services
Packet
Transport and
IP access
SS7
transport
C5
C4
Voice - Circuit Switching
Voice + Data – Packet Switching
Softswitch
Legacy TDM
B1
Network
IP Access Network
(H.323, SIP, H248,…)
Packet Transport
Backbone
Voice + Data + service
Packet Switching
B3
Legacy IP
Network
B2
Border
elements
Internet Service Provider
Network
Multi Service
Network
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BUP-PM&P
Multi Service Solutions
Service point of view
Intelligent
Network
IP Network
Intelligent
Network
Services
Web Based
Services
Multi Service
Network
Mobile
Services
Mobile Network
Cuncurrent
Services
Multimedia
services
DVB Network
Switched
Services
Fixed Network
Integrated Multi service framework enables all layers and elements
to carry all services and maximize network investments
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
The General Evolution of Services point
Traditional
communication
services
+
-
Converged
services
Vertically integrated development
with service-level functionalities
intertwined with underlying
connection management
capabilities
Horizontal integrated development
with an API approach between
application and communication
infrastructure
Optimized for performance and
reliability
Seamless and consistent
across networks domains
Complex to develop and
difficult to extend or reuse
The development of seamless
services requires a deep
understanding of the different
protocols, data formats, enduser devices and network
capabilities
Set of available services
different when end-user
crosses the boundaries
between circuit/packet,
wireless/wireline, public
network/enterprise domains
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
Creation of services
NGN Softswitch: driver for implementation
rw
e
t
In
n
ki
r
o
g
th
i
w
ad
r
t
tw
e
.n
HLR/VLR
Rapid
development/
deployment
innovative
services
Softswitch
Independence
from media
and speed
Any access
k
or
Signalling
Integration
Wireless
access
Wireline
Access
Broadband
Access
SS7
Signaling
+ Operational Integration
IN
Services
(Billing & OSS, OAM&P)
©Italtel S.p.A. 2003, All rights reserved
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Softswitch : a Middle war ?
Softswitch: More an architecture than a product
A strong religion battle is fighting …
‰ Border Elements towards the “legacy”
Parlay
Jain
‰ Security
rs
e
iv
dr
‰ IP Addressing
‰ QoS
‰ New Network Elements (TG, MG, endpoints …)
H.323
SIP
key points
‰ New Interfaces between Network Elements
‰ New Functional Layering (AS, MS …)
Three perspectives of convergence
‰ New Interfaces between Functions
Transport, user and service point of view
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
Legacy TDM and H.323 model
GW decomposition concept
IN
UP
SP
GK
Service GK
MGC
Class 5
switches
Class 4
switches
H.323
Trunks
PSTN
MG
MGCP/H.248
IP
H.323
SS7 Signalling
SIGTRAN
MS
SG
TDM
endpoint
PSTN Gateway
H.323
endpoint
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
Legacy TDM and SIP model
GW decomposition concept
IN
UP
MGC
Class 5
switches
SP
SIP Call
Agent
Application
Server
Class 4
switches
Portals
SIP
Trunks
MG
MGCP/H.248
PSTN
IP
HTTP/SIP
SIGTRAN
Signalling
MS
SG
TDM
endpoint
PSTN Gateway
SIP
UA
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
H.323 and SIP model
UP
UP
SP
GK
SP
SIP Call
Agent
Service GK
H.323
Application
Server
SIP
PSTN
GW
H.323
H.323
SIP
PSTN
GW
IP
HTTP/SIP
Gateway
H.323
endpoint
Portals
MS
MS
Network Interface
(Signalling + bearer)
SIP
UA
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
iMSS Solution architecture Model
O&M
Interface
SP SCP
Open API
Parlay
Softswitch
INAP
UP
SIP AS
Traditional
C4 / C5
MGC
SP
SIP Call
Agent
GK
Application
Server
Portals
PRI
V5.x
SIP
Signalling
SIGTRAN
SG
PSTN
IP
HTTP/SIP
MGCP
Trunks
MG
PSTN Gateway
Optional TDM part
MS
H.323
Service
GK
H.323
endpoint
SP
Third party
Application
Server
SIP
UA
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
Border Element towards legacy TDM & IP
Enhanced C4 + MGC + SG - Signalling
H.323 Network
IN
GK
H.323
interMGCP (SIP-T)
MGC
Signalling
PSTN/
PLMN
SIGTRAN
Managed
IP
Network
MGC
SS7
SG
SIP
MG
Trunks
Trunks
SG
SS7
Trunks
Signalling
MGCP/H248
MGCP/H248
SIP
CA
SIP Network
MG
PSTN/
PLMN
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
Border Element towards legacy TDM & IP
Enhanced C4 + MGC + SG - Bearer
H.323 Network
IN
GK
Signalling
MGC
MGC
Signalling
PSTN/
PLMN
Managed
IP
Network
SS7
SG
Trunks
Trunks
SG
SS7
MG
MG
Trunks
SIP
CA
SIP Network
PSTN/
PLMN
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
Key Points – Enhanced Class 4 Solution
Italtel Approach’s benefits:
Separation of Call Control from bearer level
Integration & Interoperability with legacy networks
Single Point to Network Management System
Support for Multiple Gateway Protocols
Multi POP geographically distributed, single C4 Softswitch
TDM and Softswitch feature embedded in a single platform
ItaltelInteroperability
Multi Servicebetween
Solutiondifferent
(iMSS) lets:
Call Control vendors
Incumbent Operators, fixed and mobile, to gradually upgrade the
existing circuit network moving towards NGN infrastructures
New Operators to start directly with an NGN infrastructure
optimising the interconnection with legacy networks
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
Interconnection of innovative users
C5 and Softswitch
Application
& Feature
server
IN
softswitch
Signalling
SIP-T
SIP-T
MGC
MGC
SS7
Signalling
backhaul
Trunks
PSTN/
PLMN
SS7
PRI
V5.x
SG
Managed
IP
Network
MG/
SG
Trunks
Signalling
MG
H.248
AG
H.323
SIP
AG/RG
IP Access
Gigabit Eth., LRE,
xDSL, WLL …
H.323 Network
H.323 endpoints
Trunks
SIP Network
SIP UA
PSTN/
PLMN
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
Key Points – Class 5 Solution (Softswitch)
Italtel Approach’s benefits:
Independence of Call Control from User Devices
Integration & Interoperability with legacy users and services
Open Interface with a Service Layer for the introduction of new
services allowing new application developers and Service
Provider going into the service “carrier” value chain
Single point to the Network Management System
Support
for Multiple
Gateway/Devices
Italtel Multi
Service
Solution
(iMSS) lets theProtocols
operators to connect
between
different
LegacyInteroperability
users and new
IP based
usersGateway/Device
guarantying thevendors
end-to-end
Interoperability between different Call Control vendors
interoperability in terms of connectivity and services
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
What’s a service?
Different Market Perspectives
– Services demand by customers
bring
– Services demand from Service Operator
Services trends
& network
requirements
Different Offering Perspective
– Switched Services (user and network
services)
– PVN & VoIP Services (user and network
services)
– Intelligent Network
– Multimedia services (VCIP, IPTV, …)
– Internet Based Services (click to talk,
emwi, icw …)
– Data services
– ……..
Voice
Traditional
Two type
Add-value
Voice and data
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
Service Offer: Some Key Points
Traditional
Services
importance to offer voice based
services also to innovative users
New kind “behaviour”
for traditional users and
call related service model
for innovative ones
Multi Service
Framework
Cuncurrent
Services
Add-value
Services
importance to offer new services
also to traditional users
New kind “behaviour”
for innovative users and
call unrelated service model
for traditional ones
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
From STS to VAS towards Service Portals
Customized
area
P-PORTAL
V/H PORTALS
Personal Portal with
Services Broker
Other Services
Broker
MultiMedia messaging
Services
Portal
Services
Portal
Switched
Services
VPNVoIP
Services
Vertical
Portal
Horizzontal
Portal
Horizzontal
Horizzontal
Horizzontal
Portal
Portal
Portal
Vertical
Portal
SERVICES PROFILES
SERVICES FAMILIES
IN&WB
Services
Basic Services
Is it what I
really need?
OK, this is
good for me!
Multimedia
Services
Mobile
Other
Services Services
VAS Services
This proposal is
very interesting!
My personal
world.
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
Service Offer: New complexity
Call
related
Service
Logic 1
traditional
Service
Logic 2
IN call model
V5
legs
Service
Logic n
Service
Logic m
POTS/ISDN
legs
H.323
legs
SIP
legs
Call
unrelated
Add-value
IN call model
TDM
MGCP
legs
ToIP
Voice legs
endpoints
Service
Logic j
Bearer flow
Data legs
endpoints
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
iMSS Solution: Functional Relationship
SCP
Web Self
Open API
Provisioning/activation Parlay
(SOAP)
Appl.
Serv.
FS
SIP
SOAP
server
Radius, ….
Parlay
GW
SCP
SIP
Application
Server
STS
VAS
mediation
SSF
SIP
Appl.
Server
iMSS
softswitch
Call Handling
adaptation
SEC
MGC
adaptation
Call Control Element
TDM
interface
Circuit
“leg”
Matrix
INAP, ISUP,
PRI, V5.x
…..
MG
IP
interface
H.323, SIP
MGCP, SIGTRAN
……
Packet
“leg”
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
iMSS: Services & Applications offer
SCP
IN Services:
- ARS
- VPN
- Prepaid
A.S.
I.N.
CORE INAP
Standard
Interfaces
Embedded IN Services:
IN-DB
iMSS
- Advanced call routing
- Lawful interception
-Network traffic management
-…
Voice Services
PSTN
PSTN
PLMN
PLMN
ISUP
CORE
INAP
SIP-T
SCTP
SIP
H.323
User Services:
TDM
IP
IP
IP
3rd Party
–Web Telephony, ICW
–Unified Messaging
–Personal Communic.
–Click to Dial, Mail&Speak
Call/Session Handling
Network Services:
A.S.
Value Added Multimedia
Services:
VAS
SSP
MGCP
- Number Portability
- Free Phone
- Call screening (White&Black List)
SIP,
H.323
Parlay API
A.S.
INTERNET
INTERNET
directs or remote users
- Emergency call
- Multi-party conference
- Call forwarding (CFx)
- CLIP/CLIR,
- Call Barring, …
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
POTS
ISDN
iMSS: Service LAN “concept”
Reference Architecture – iMSS solution
Intelligent
Network
DB
Softswitch
WEBPHONE
PORTAL
Back End
SS7 signalling
Intranet
Access
PRI
Front End
V5
FW
Edge
NAT / Firewall
PSTN
Internal
Firewall
Edge
Internet
Network
SIP
MGCP
trunks
MG
H.323
BRAS
xDSL
ETH
WLAN
IP Managed
Network
H.323
SIP
Proprietary
(ActiveX) /
HTTP
IP
POTS
ISDN
H.323
PC-Client
IP
SIP UA
PC-Client
TP SIP servers
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
Key Points – Services
Separation of Call Control layer from Service layer with Standard,
Open interface
Traditional and advanced services, optimizing resources usage and
reducing operational costs
Fast deployment and customizing of new services using Service
Creation Environment for best time to market
Fast provisioning and simplified access to network services using
current and new user friendly terminals (multimedia or not)
Customer Services Profile Management
Service Profiles Evolution Path (soft Profiles upgrades with new
services) and soft impact on existing environment
Service(iMSS)
Management
(including
ItaltelComprehensive
Multi Service Solution
lets theSystem
operators
to offer Billing
legacy with
users
Prepaid
service,
. .) the same bouquet of services enabling all layers
and new
IP based
users
Scalability
and elements
ofoffering
the multi service network to carry all services
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
NGN: the answer to Service Provider Challenges
– NGN Class 4
– 40-60% of
backbone
OPEX savings
Operating
efficiency
today
– NGN Class 5
– Innovative
services
– Service bundle
– Efficiency
improvement
Innovation of services
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
iMSS Softswitch Functional Model
Telephony Services
SL
Service
Signalling
Adaptation
Network &
Protocol
Handling
SL
SL
SL
SL
SG
AS
mediation
DB
Network Capabilities APIs
Operation & Management
Control
SL
SCF
CH
STP
SSP/SSF/
SRF
Media
Server
Resource APIs
I/F HND
MGC
I/F HND
I/F HND
…..
I/F HND
I/F HND
I/F HND
I/F HND
TDM
SE
ISUP
PRI
V5.x
…..
transport
Telephony Physical Interface
TDM Users
SS7 Signalling
IIntelligent Network
H.323
SIP
MGCP
M2PA/
…..
SCTP
transport
IP Physical Interface
IP Users
Media Gateway/Access Gateway
Application Server
SS7 over IP
Other CAs
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
iMSS Softswitch : POP concept
Single site (centralized)
Multi site (distributed)
Pure
POP
concept
trunks
trunks
SS7 sign.
POTS
ISDN
IP
SIP-Proxy
IP
SIP-based
PC-Client
SIP Phones
SIP-Proxy
IP
POTS
ISDN
PRI
V5.x
trunks
SS7 sign.
Enhanced
IP
backbone
SS7 sign.
IP
backbone
IP
SIP-based
PC-Client
SIP Phones
PRI
V5.x
trunks
SS7 sign.
trunks
trunks
IP
backbone
POTS
ISDN
IP
IP
backbone
SIP-Proxy
SIP-Proxy
IP
SIP-based
PC-Client
MGCP +SS7 Backhaul
SIP Phones
H.323
IP
POTS
ISDN
SIP
IP
SIP-based
PC-Client
SIP-T
SIP Phones
Inter iMSS communication
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
Voice/Data Integrated Backbone - Pure POP
OSS
Core INAP
CS1
I.N
.
iMSS
iMSS
ISP/
Internet
Media
Gateways
SS7
IP H.323/SIP
Network
tru
nk
s
VoIP Gateways
Media
Gateways
PSTN/PLMN
Universal
Gateways
(Voice + RAS)
s
nk
t ru
trunks
Managed IP Backbone
PSTN/PLMN
H.323/SIP
SS7
MGCP/MeGaCo
ISUP-IVS/SIP-T
Local/Transit/MSC
Exchange
Local/Transit/MSC
Exchange
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
Voice/Data Integrated Backbone - Enhanced POP
I.N
.
OSS
Core INAP
CS1
Core INAP
CS1
Managed IP Backbone
iMSS
SS7
iMSS
Media
Gateways
Media
Gateways
POP
I.N
.
POP
iMSS
SS7
PRI
PRI
H.323
SIP
PABX
H.323
SIP
PABX
trunks
trunks
PRI
VoIP Gateways
PRI
RAS
PSTN/PLMN
RAS
ISP/
Internet
PSTN/PLMN
ISP/
Internet
Local/Transit/MSC
Exchange
MGCP/MeGaCo
Local/Transit/MSC
Exchange
H.323/SIP
SS7
ISUP-IVS/SIP-T
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
Voice/Data Integrated Backbone - Mixed POP
POP
iMSS
signalling
Core INAP
CS1
Managed IP Backbone
LE
iMSS
Media
Gateways
Media
Gateways
SS7
I.N
.
POP
iMSS
Trunks
SS7
PRI
PRI
V5
H.323
SIP
PABX
PABX
trunks
trunks
VoIP Gateways
PSTN/PLMN
PSTN/PLMN
Local/Transit
Exchange
MGCP/MeGaCo
Local/Transit/MSC
Exchange
H.323/SIP
SS7
ISUP-IVS/SIP-T
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
SIP - Innovative Users Interconnection
NOC
I.N
.
V5.2
Core INAP
CS1
CAP
UMTS
PRI
CAP
ISP/
Internet
POP
Softsitch
iMSS
C4/C5
SS7
I.N
.
Application &
Feature Server
PO
P
Softswitch
iMSS
C4/C5
IP Backbone
Pure
Softswitch
iMSS C5
Universal
Port
PBX
H.323/SIP
trunks
Core INAP
CS1
UP
PRI
V5.2
SS7
PBX
H.323
trunks
IP-PBX
PSTN/PLMN
Residential Customers
H.323/SIP endpoints
Business Customers
Local/Transit/MSC
Exchange
MGCP
H.323/SIP
PSTN/PLMN
Local/Transit/MSC
Exchange
SS7
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
iMSS Voice/Data IB for Mobile Networks
Gateway MSC
MAP to query HLR
for roaming number
HLR/AuC
MAP
MAP
MGC/GMSC
MAP
iMSS
ISUP
ISUP
MGCP
MGCP
MSC
MSC
A
E1
E1
PSTN
IP
ISUP
A
E1
ISUP
E1
PSTN
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
iMSS H.323 to PSTN Gateway
INAP
PTT
PSTN
PRI
Appl.
Server
iMSS
MGCP
IP Network (H.323)
Household
AGK
POTS
IAD
IAD
Other
Operators
Giga Ethernet
Ring
Ethernet
Building
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
Access Systems
IN
Eth
IAD
SS7
PSTN
iMSS
IAD
Access
GATEKEEPER
°
Trunking
Gateways
Fiber
Access
Solution
(Ethernet
to the
home)
GE
°
IP
Network
DSLAM
Internet
ADSL
SHDS
L
IAD
IAD
Copper
Access
Solution
(with
ADSL &
SHDSL)
IP
MGCP
H.323
SS7
BASE STATION
IAD
Wireless
Local
Loop
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
Thank you!
Questions ?
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
iMSS C5 Innovative
ISUP
ISDN PRA
TCAP/SCCP
(IN) Core INAP
Trunks
E1
E1
E1
V5.2
E1
MG
MGCP/IP
AN
POTS, ISDN
AGW
POTS, ISDN
Eth
Class 5
OpenAPI
Application Server
MGCP*/IP
Eth
iMSS
H.225(H245)/IP
Eth
MGCP/IP
Eth
Eth
SIP/IP
Eth
SIP/IP
Application Server
ISDN
POTS (IAD/RGW)
POTS, ISDN (IAD/RGW)
H.225(H245)/IP
Eth
H.323 (Terminal)
Eth
Eth
MxxA/SCTP
Signalling Gateway
POTS, ISDN (IAD/RGW)
Eth
SIP/IP
Eth
SIP-T/IP
Call Agent
SIP (Terminal)
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
iMSS C5 Traditional
Trunks
ISUP
ISDN PRA
TCAP/SCCP
(IN) Core INAP
E1
E1
E1
V5.2
E1
MG
MGCP/IP
AN
POTS, ISDN
AGW
POTS, ISDN
Eth
iMSS
Class 5
OpenAPI
Application Server
MGCP*/IP
Eth
H.225(H245)/IP
Eth
MGCP/IP
Eth
Eth
SIP/IP
Eth
SIP/IP
Application Server
ISDN
POTS, ISDN (IAD/RGW)
POTS (IAD/RGW)
POTS, ISDN (IAD/RGW)
H.225(H245)/IP
Eth
H.323 (Terminal)
Eth
Eth
MxxA/SCTP
Signalling Gateway
Eth
SIP/IP
Eth
SIP-T/IP
Call Agent
SIP (Terminal)
©Italtel S.p.A. 2003, All rights reserved
BUP-PM&P
ITALTEL Multi-Service Solution (iMSS)
SIP-T/IP
Call Agent
ISDN PRA
E1
Eth
V5.2
TCAP/SCCP
(IN) Core INAP
E1
E1
iMSS
OpenAPI
Application Server
Class 5
Eth
Eth
MGCP*/IP
H.225(H245)/IP
Eth
H.225(H245)/IP
SIP/IP
Application Server
Eth
Eth
MGCP/IP
Eth
MG
ISDN
MGCP/IP
SIP/IP
Eth
Eth
SIP/IP
Eth
MxxA/SCTP
Signalling Gateway
E1
Eth
ISUP
Trunks
AN
POTS, ISDN
AGW
POTS, ISDN
H.323 (IAD)
POTS, ISDN (Terminal)
POTS (IAD)
POTS, ISDN (IAD)
SIP (Terminal)