Liberator D

Multiple-Port ISDN T1/E1 PRI mux, converter,sharer, switch or concentrator

Features

• Supports 4 to 40 ISDN PRIs
• T1 ISDN and T1/E1 user-selectable versions
• Distributed non-blocking architecture
• Any timeslot to any timeslot connectivity
• Each 4-port element has PSU (AC or DC) for enhanced system resilience
• Link multiple units via on-board 4-port switch with standard CAT5E cable
• Support for at least 10 interconnected units giving 40 full or fractional PRIs (non-blocking) pairs of PRIs power-failure relay protected
• Clocks recovered across interconnection links for complete clock distribution and sourcing flexibility
• User-switchable NT/TE interfaces (connects to a network and local equipment)
• Support for Fraction PRIs
• E1 to T1 conversion
• A-Law to ě-Law conversion
• Support for contention or over-booking
• Call Progress Tone generation
• Sophisticated number manipulation/conversion/LCR
• Automatic Primary/Secondary/Tertiary routing of calls
• Flexible clocking options/hierarchy
• ISDN L2 and L3 message capture and log for analysis
• Intuitive to configure via GUI management package

In Detail

Liberator D is a non-blocking PRI ISDN cross-connect switch with advanced routing and conversion options. Using flexible Routing Profiles, individual “B” channels or timeslots can be switched to any PRI within the Liberator network.

Call routing is performed on DDI, CLI, sub-address, call type and originating port or any combination. Timeslots within a single PRI or across multiple PRIs can be grouped in any combination to provide Hunt Groups. If destinations are unavailable, busy or not answered after a period of time, Secondary and Tertiary Routing Profiles can be configured.

Each Liberator D element supports 4 PRI ISDN ports and benefits from a 4-port “Link” switch. This means multiple Liberator D units can be connected via their Link ports on dedicated CAT5E cables to build a large non-blocking switch/converter.

The design of the Liberator D means PRI ports can be distributed around a comms room, building, or base, delivering ports to where they are needed.