The use of Mobile Gateways and VoIP Gateways is increasing.

In many countries the cost of a mobile-to-mobile call can be significantly less than a land-line to mobile call and the Mobile Gateway addresses this application but sometimes the network interfaces on the Gateway do not match either the PABX ports or the existing network access.

VoIP Gateways can have similar problems.

1. The Mobile Gateway will often be connected to the PABX which must then be configured to route all calls destined for mobile phones to the gateway.

But there can be some issues:

• Some gateways only support BRI interfaces of a type which may not be available on the PABX
• Some gateways do not have a PRI interface when this is the only, or best option on the PABX
• The PABX may not be able to route the calls correctly
• You need to involve your PABX vendor/maintainer in reconfiguring the switch.

Liberator can help in a number of ways.

This diagram illustrates adding a BRI Gateway to a system using PRI. No PABX or network changes are needed to interfaces and Liberator can even route the calls to the Gateway so absolutely no PABX reconfiguration work is needed.

In this diagram the Liberator is used because perhaps the PABX cannot have any more ports added, the PABX may not support the correct BRI presentation and Liberator does all the routing so bo changes are needed to the switches configuration.

• Liberator can convert almost any BRI interface to any other and convert BRIs to PRI, making inter-connectivity fast, low-cost and simple
• It can route calls automatically to either the ISDN network or to the gateway without having to change any switch configuration or involve the switch vendor/maintainer
• It can cycle through gateway ports in a number of different ways to make sure each SIM card is loaded similarly
• It is very simple to configure and reconfigure via an intuitive graphical interface (see brief demo)

2. The application for VoIP Gateways is similar to that of Mobile Gateways, but perhaps the diagram below shows a more typical use where a PRI Gateway is easily dropped into a BRI environment. Once again there are no changes to the PABX setup as Liberator can route the correct calls to either the ISDN or the Gateway.

Using Liberator in a VoIP migration scenario is covered under VoIP Migration Tool.

Links to Products for this application:

Liberator "S"

• Easy to manage and reconfigure via intuitive graphical interface (click for brief presentation)
• Supports up to 3 PRIs
• 4, 8, 12 or 16 BRI "S" interfaces (both NT and TE)

Liberator "DUO"

• Easy to manage and reconfigure via intuitive graphical interface (click for brief presentation)
• Supports up to 4 PRIs
• 4, 8, 12 or 16 BRI "S" or "U" interfaces (NT, TE and LT)

The above two products come with up to 16 BRIs plus E1/T1 PRIs. For applications requiring more ports we can either cascade Liberators or look at the DB120 chassis.

Links to other relevant applications pages:

VoIP ISDN Migration Tool

• Simplify and ease the migration from a legacy PBX to an IP-pBX

PRI conversion

• Convert a PRI network port to multiple BRIs with or without local PRIs

ISDN Simulator or ISDN Emulator

• Simulate BRI and/or PRI for testing, training and demonstrations

T1 to E1 ISDN Conversion

• Convert between T1 ISDN and E1 ISDN

PRI Sharing

• Share a PRI between more than one local PRI, with/without BRIs as well.

See also the drop-down menu at the top left of these pages

All Liberator products are very flexible with the option to use advanced routing, number conversion and scheduling facilities; most are remotely upgradeable via ISDN; relay-protection is available between key interfaces; all are managed by a common, simple and intuitive Manager; all are simple to install and configure.

Thousands of Patapsco products are installed in Carrier and Corporate networks across the world.

In summary, Liberator can make the installation, configuration and on-going use of Gateways simple and manageable with no impact on existing systems or users.

If you would like to know more about this application or to discuss your questions or requirements, please use our on-line help and chat facility in the top banner or contact us.