One of the applications Patapsco's Liberator products address is converting multiple BRI ISDN ports from the network or carrier into one or more PRIs for local devices such as routers, PABXs, gateways etc.

Multiple BRIs may be used where PRIs are required on the customer site, but PRI from the carrier may be either unavailable or prohibitively expensive.

This solution is also an simple and low-cost method of using BRIs to provide fractional PRIs (with fewer than 30 "B" channels). Convert the BRIs into one or more PRIs.

Benefits include:

• Providing PRIs where they may not be available
• Using low cost BRIs (both installation, deposit and rental) to reduce costs
• Using BRIs to build a Fractional PRI where the carrier may not offer a sub-30 "B" channel PRI option.

Patapsco's products can use BRIs to deliver multiple Fractional PRIs and local BRIs where all devices can efficiently share network access.

Liberator can also assist in Gateway type applications or where a piece of comms equipment has a different interface to that of the network or installed base.

In the example below a PRI Gateway uses Liberator to extract a PRI from an otherwise BRI environment. No changes are needed to the network or PABX. This application is explored in more detail in the VoIP Migration and Gateway application pages.

Do you want to do the opposite of above and use PRIs from the network to deliver a local BRIs and perhaps PRI?

Links to Products for this application:

Liberator "S"

• 4, 8,12 or 16 BRI "S" ports
• Converted into 1, 2 or 3 local E1/T1 PRIs
• With or without local BRI "S" interfaces as well

Brief movie showing manager and technical capabilities.

Liberator "D"

• Modular distributable multiple PRI system
• Multiple 4 PRI "Elements"
• Build a PRI cros
• Optional Powes-connect switch of 4 - 64 PRIs
• Non-blocking archetecture
• E1/T1 and A-Law to u-Law conversion
• Very flexible routing options

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:

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.