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Dialogic

I-Gate

IP Telephony Media Gateways

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 cost-

efficiencies 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 next-

generation 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.

Dialogic

I-Gate

PSTN or

Media Gateway y

MSC Switch

PSTN or

I-Gate 4000 EDGE

MSC Switch

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.

MSC

Dialogic

I-Gate

4000

PRO Media Gateway

Figure 2. Inter-MSC and Point-of-Interconnection

4000 Media Gateways

4000 PRO

I-Gate 4000 PRO

Dialogic

I-Gate

4000

EDGE Media Gateway

MSC

I-Gate 4000 EDGE

MSC

TDM or IP Network

compressed traffic

PSTN or

MSC Switch

I-Gate 4000 EDGE

I-Gate 4000 PRO

Hub Site

MSC

I-Gate 4000 EDGE

Datasheet

Dialogic

I-Gate

4000 EDGE

Media Gateway y

I-Gate 4000 PRO

Fixed Phone

POI

Mobile Phone

Local PSTN Switch

Remote Region

Local PSTN Switch

Remote Region

Mobile Phone

POI

Fixed Phone

i d Ph

PSTN or

MSC Switch

PSTN or

MSC Switch