An NGN(Next Generation Network) is a universal multi-service
network designed for the transmission of voice, images and data
on a packet switching basis. Its network seamlessly blends the
public switched telephone network (PSTN) and the public switched
data network (PSDN), creating a single multiservice network. Rather
than large, centralized, proprietary switch infrastructures, ,
this next-generation architecture pushes central-office (CO) functionality
to the edge of the network.
An NGN provides the quality of service necessary
for different types of telecommunication traffic. Characteristically,
the transmission and the routing of the packets and the elements
of the transmission equipments ( links, routers, switches, gateways)
are physically and logically separated from the devices and the
intelligence controlling the execution of calls and services.
The network intelligence supports all types of services in the
packet network, from basic voice telephone to data , image, multi-media,
broadband and management applications. These feature represent
the basis for drawing a distinction between an NGN and an ordinary
telephone and IP network, which otherwise prevail in telecommunications.
An NGN, the result of merging the internet with the telephone
network, combines the best features of both. It provides:
- Adaptability
for transmitting any type of traffic, which can be
compared to the internet’s adaptability as opposed
to the inefficiency of a PSTN in transmitting data(
this fact is especially important with regard to the
estimation that data will soon represent 90% of telecommunication
traffic).
- Guaranteed
quality of voice telephony services and critical data
applications; in this case an NGN offers PSTN reliability
as opposed to the best effort of the internet’s
capacity.
- Low
transmission costs per content unit- the price is
closer to the internet than to a PSTN, the total amount
of data and voice traffic trebles every year.
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• SSN7 signaling
• Dynamic routing
• Number translation
• TDM switching
• Network transparency of supplementary and Centrex services
• Signaling conversion
• Connectivity to subscribers on Switch Access Node (SAN)
• H.323 connectivity to third-party gatekeepers
• Fax/modem over IP
• VoiceXML interpretation and execution
• Connectivity to external ASR and TTS servers
The SI2000 Media Gateway (MGW) is a high-density feature device
that includes a media and signaling gateway and a Voice Extensible
Markup Language (VoiceXML) interpreter in the same box. Any 2-Mbps
links can be configured as a signaling link. Furthermore, the
highly modular SI2000 software includes well-proven software modules
from the SI2000 transit exchange. Transit features make it possible
for the MGW to operate as a stand-alone device, and for it to
play the role of a transit exchange. The main difference with
a Time Division Multiplexing (TDM) transit exchange is that the
MGW uses the Internet Protocol (IP) network as a transport network.
The MGW can also operate under the control of any standard H.323
gatekeeper as well.
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• SSN7 signaling
• Dynamic routing
• Number translation
• TDM switching
• Network transparency of supplementary and Centrex services
• Signaling conversion
• Connectivity to subscribers on Switch Access Node (SAN)
• H.323 connectivity to third-party gatekeepers
• Fax/modem over IP
• VoiceXML interpretation and execution
• Connectivity to external ASR and TTS servers
The SI2000 Media Gateway (MGW) is a high-density feature device
that includes a media and signaling gateway and a Voice Extensible
Markup Language (VoiceXML) interpreter in the same box. Any 2-Mbps
links can be configured as a signaling link. Furthermore, the
highly modular SI2000 software includes well-proven software modules
from the SI2000 transit exchange. Transit features make it possible
for the MGW to operate as a stand-alone device, and for it to
play the role of a transit exchange. The main difference with
a Time Division Multiplexing (TDM) transit exchange is that the
MGW uses the Internet Protocol (IP) network as a transport network.
The MGW can also operate under the control of any standard H.323
gatekeeper as well.
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