Datasheet
This datasheet discusses the following products:
• Dialogic® I-Gate® 4000 EDGE Media Gateway — low-to-medium
port density
• Dialogic
®
I-Gate® 4000 PRO Media Gateway — medium-to-high
port density
Dialogic® I-Gate® 4000 Media Gateways are designed for telecom
operators seeking a competitive advantage by moving to an operationally
efficient and service-centric IP network. I-Gate 4000 Media Gateways
deliver fixed-line, toll-quality voice in a compact footprint for satisfying
Voice-over-IP (VoIP) and Voice-over-TDM telephony requirements in
low- and medium-scale port densities.
I-Gate 4000 Media Gateways leverage sophisticated DSP technology,
and have set a benchmark for voice quality in TDM and IP telephony, while preserving end-to-end service transparency for voice, fax, modem,
and video calls. By combining high-quality bandwidth optimization, reliability, and scalability with open standards-based interfaces, the I-Gate
4000 PRO and EDGE Media Gateways can enable powerful operational and capital expense saving solutions for both incumbent and alternative
service providers.
Dialogic® I-Gate® 4000 Media Gateways
IP Telephony Media Gateways
Features Benefits
Proven bandwidth optimization technology for circuit-switched
networks extended to VoIP networks
Delivers packet voice quality
Proven voice processing technology and advanced codec
implementations, coupled with a rich set of bandwidth optimization
and voice quality protection techniques
Enables carriers to realize bandwidth savings of up to 16:1
Bandwidth-efficient and reliable transport of CCS for SS7, PRI, and
QSIG and CAS, despite network impairments
Delivers bandwidth savings opportunities, full signaling robustness,
and a high CCR along with enabling cost-effective network topologies
based on an optimal location of signaling gateways at a small number
of strategic sites
Highly efficient signal detection and processing techniques
Provides unrivaled voice, fax, modem, and video call completion
rates with exceptional quality, allowing an operator to curtail expenses
while capturing billable minutes
99.99995% (“six 9s”) availability
Provides high reliability
Combines high-quality bandwidth optimization, reliability, and
scalability with open standards-based interfaces
Enables a powerful operational and capital expense saving solution
Supports a wide range of transmission infrastructures
Can be used in terrestrial, radio link, and satellite installations
Dialogic® I-Gate® 4000 Media Gateways
IP Telephony Media Gateways
Datasheet
2
Field-Proven Voice Quality over TDM and IP Networks
The I-Gate 4000 Media Gateways have been deployed by hundreds of carriers in more than 100 countries for voice, fax, modem, video, and
signaling traffic. The I-Gate 4000 Media Gateways enable carriers to bridge the gap between circuit-switched and next-generation Voice-over-IP
(VoIP) networks by delivering industry standard quality packet voice.
Bandwidth Savings without Compromising Voice Quality
Field-proven voice processing technology and advanced codec implementations, coupled with a rich set of bandwidth optimization and voice
quality protection techniques, enable carriers to realize bandwidth savings of up to 16:1 with I-Gate 4000 Media Gateways.
Bandwidth-Efficient and Reliable Signaling Transport
The unmatched ability of I-Gate 4000 Media Gateways to support bandwidth-efficient and reliable transport of Common Channel Signaling
(CCS) for SS7, PRI, and QSIG and Channel Associated Signaling (CAS), despite network impairments, can deliver further bandwidth savings,
full signaling robustness, and a high Call Completion Rate (CCR). In addition to bandwidth savings, this capability enables cost-effective network
topologies based on the optimal location of signaling gateways at a small number of strategic sites.
Cost-Effective Fax, Modem, and Video Services
The highly efficient signal detection and processing techniques of I-Gate 4000 Media Gateways provide voice, fax, modem, and video calls with
unrivaled completion rates and with the exceptional quality, allowing the operator to curtail expenses while capturing billable minutes.
Flexible Interoperation
I-Gate 4000 Media Gateways are built with total openness in mind — ready to interoperate with standards-compliant transmission and switching
network elements. These Gateways are consistent with next-generation network architecture models, offering proven interoperability with
multivendor softswitches based on industry standards/protocols such as MGCP, H.248, and SIGTRAN.
Static Trunking Applications
Despite continuing decreases in bandwidth costs, many international routes and national long-distance networks still have high transmission
prices or limited available transmission bandwidth. For telecom operators carrying voice traffic over costly or bandwidth-limited transmission
links, static trunking systems can provide a distinctive option for realizing substantial savings on bandwidth, equipment, and operations, more
efficient utilization of deployed network resources, and new opportunities for improved competitiveness and increasing profitability.
Applications that can stand to benefit from static trunking include:
• Transmission of long-distance international and domestic telephony traffic
• Interconnection of MSC switches in mobile networks
• Backhaul transmission between MSC switches and Points of Interconnection (POIs) to the PSTN
• Call center and business process outsourcing
• Backup protection networks
Dialogic® I-Gate® 4000 Media Gateways
IP Telephony Media Gateways
Datasheet
3
Wireline or Mobile Interswitch Transport Savings
In a static trunking solution, the traffic transmitted between PSTN and/or MSC switches is compressed by an I-Gate 4000 EDGE Gateway or
I-Gate 4000 PRO Gateway connected to one of the switches and decompressed at a remote I-Gate 4000 EDGE Gateway or I-Gate 4000 PRO
Gateway connected to the second switch. The compressed traffic can be carried over IP or TDM networks. See Figure 1 for an example.
With the I-Gate 4000 Media Gateways, carriers can build one IP transport network and use it for both voice and data — enjoying the costefficiencies of converged IP transport prior to undertaking a full-fledged network migration. Carriers can use their existing IP infrastructure
and bypass the TDM transmission core without compromising existing quality or stability, and while preserving PSTN switch investment (for
example, switches and OSS).
Since the same I-Gate 4000 EDGE Gateway or I-Gate 4000 PRO Gateway can be used for both static trunking and softswitch-controlled VoIP
services, the I-Gate 4000 Media Gateways offer a smooth evolution path from traditional TDM switches and transmission links to all-IP nextgeneration networks. Carriers with a TDM switching infrastructure can initially leverage the static trunking capabilities of the I-Gate 4000 Media
Gateways to lower costs by transporting voice over their packet-based data networks. Utilizing the same infrastructure, carriers can then migrate
to a more flexible and cost-effective switched IP network by adding a softswitch platform to their networks.
Figure 1. Wireline or Mobile Interswitch Transport
Mobile Network Point of Interconnection
A significant number of calls between mobile phones and PSTN phones require transport through the PSTN long-distance switching and
transmission infrastructure. The mobile network operator often has to pay the wireline operator very high fees for long-distance service. By using
a static trunking solution that compresses the traffic between the MSC site and a POI site near the local PSTN switch, the mobile operator can
achieve significant savings by avoiding the need to pay long-distance fees. See Figure 2 for an example.
Figure 2. Inter-MSC and Point-of-Interconnection
TDM or IP Network
PSTN or
MSC Switch
Dialogic® I-Gate® 4000 PRO
Media Gateway
y
Dialogic® I-Gate® 4000 EDGE
Media Gateway
y
PSTN or
MSC Switch
I-Gate 4000 EDGE
PSTN or
MSC Switch
compressed traffic
PSTN or
MSC Switch
I-Gate 4000 PRO
PSTN or
MSC Switch
I-Gate 4000 PRO
Mobile Phone
Remote RegionLocal PSTN Switch
Remote RegionLocal PSTN Switch
Dialogic® I-Gate® 4000
PRO Media Gateway
Dialogic
®
I-Gate® 4000
EDGE Media Gateway
I-Gate 4000 EDGE
I-Gate 4000 EDGE
MSC
MSC
MSC
Fixed Phone
POI
I-Gate 4000 PRO
g
Mobile Phone
Hub Site
I-Gate 4000 EDGE
Fixed Phone
POI
MSC
Dialogic® I-Gate® 4000 Media Gateways
IP Telephony Media Gateways
Datasheet
4
Static Trunking in Satellite and Radio Link Applications
The high-compression techniques and voice quality protection mechanisms of I-Gate 4000 Media Gateways enable a cost-effective solution
for satellite and radio link routes over TDM or IP links. A static trunking solution with I-Gate 4000 Gateways can be deployed either in a singleroute point-to-point configuration, or in a point-to-multipoint configuration (supporting multiple bearer links), thus handling traffic to multiple
destinations. See Figure 3 for an example. Furthermore, the smart End-to-End Compression feature of the I-Gate 4000 Media Gateways can
contribute to additional CAPEX and OPEX savings in applications encompassing call paths through several compression and decompression
segments (hops).
As the I-Gate 4000 Media Gateways support an in-band management feature, management traffic can be carried through the same bearer link
that interconnects two distant sites, thus allowing the operator to manage remote I-Gate 4000 Media Gateways from a central (hub) site, without
separate management links.
In addition, the embedded cross-connect feature, which supports any-to-any cross-connection between E1/T1 64 kbps DS0 channels, allows
operators to reduce overall expenses in applications requiring interconnection to multiple narrow bandwidth (thin-route) satellite links and in
ring-topology microwave applications including drop/insert nodes.
Figure 3. Satellite Static Trunking
Softswitch-Based Packet Toll/Tandem and Other Services
I-Gate 4000 Media Gateways can be controlled by a softswitch using MGCP, H.248/Megaco, or SIGTRAN. Through standards support, the I-Gate
4000 Media Gateways enable carriers to deploy next-generation VoIP switching solutions for applications such as domestic and international
long-distance services, wireline or wireless network tandem switching, Class 4 switch replacement, and PRI trunking. See Figure 4 for examples
of VoIP switching applications.
Figure 4. VoIP Switching Applications
Satellite
Switch
TDM trunks
Satellite
modem
TDM or IP
Dialogic® I-Gate® 4000 PRO Media Gateway or
Dialogic
®
I-Gate® 4000 EDGE Media Gateway
Switch
TDM trunks
Satellite
modem
TDM or IP
I-Gate 4000 PRO or I-Gate 4000 EDGE
Switch
TDM trunks
Satellite
modem
TDM or IP
I-Gate 4000 PRO or I-Gate 4000 EDGE
Sa
m
PSTN or
MSC Switch
PSTN or
MSC Switch
SS7
MGCP / H.248 MGCP / H.248
IP Backbone
Dialogic® I-Gate® 4000
EDGE Media Gateway
PSTN or
MSC Switch
I-Gate 4000 EDGE
Dialogic
®
I-Gate® 4000
PRO Media Gateway
STP
Third-Party Softswitch or
Dialogic
®
ControlSwitch™ System
PSTN or
MSC Switch
I-Gate 4000 PRO
PSTN or
MSC Switch
I-Gate 4000 EDGE
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