• Adding cards and expenses to legacy PABXs
• Adding extra ISDN circuits all of which are only partly utilised
• Separate numbering systems for the PABX and VoIP gateway making migration harder
• No real integrated system
• Difficulty in communicating between IP phones and non-IP phones on the same location

• Liberator shares a PRI between multiple local devices
• Liberator can “translate” in-coming (and out-going) numbers so customers can dial familiar numbers but be routed to the VoIP Gateway when appropriate
• Any port can call any port so VoIP calls can be routed through Liberator via the Gateway to the PABX (or visa-versa) making the transition smooth and invisible to users
• Different network “minimum” and “maximum” capacities can easily be programmed
• Capacities available to devices can be changed based upon programmable schedules
• BRI devices are removed from the legacy PABX giving a more integrated and smoother migration
• Power-failure relays give protection to the PABX or Gateway Reduces network and PABX costs
• Flexibility gives numerous migration options

• The PABX is removed without disturbing any circuits


• The link between ISDN and the Gateway is relay protected


• Ability to support multiple BRI ports
• Any port can call any port
• Easy expansion of ISDN services

• Liberator’s flexibility means different configurations can be accommodated as requirements change during and after the migration.

• Liberator has sophisticated least cost routing abilities It also can support different configurations at different times of the day.
• Contact us to discuss your requirements.

Migrating to a VoIP network can involve many compatibility and network issues including those of ISDN access. Liberator can share ISDN between PABXs, VoIP gateways, video conference units and BRI devices making the migration simple and saving network and hardware costs. Advanced features such as number translation means in-coming calls to a DDI can be routed to the PABX or the gateway. Users with VoIP handsets can contact non-VoIP users on the PABX by routing through Liberator.

Liberator provides a central ISDN and switch resource for VoIP products, aiding the migration from a PABX to a VoIP network and sharing circuits. Interconnection the Voice over IP telephones and traditional PABX extensions is enhanced and simplified.

This diagram illustrates one possible final example of VoIP migration

Liberator supports up to 3 PRIs so the Video Gateway can easy be upgraded to PRI

Alternatively Liberator can connect to Two PRIs, perhaps different Carriers for least cost routing and resilience