Kirker Europe's main PBX at their US headquarters is Asterisk based but they always had intended to link the UK and US PBXs to enable internal DDI dialling between sites. The offices are based in a remote location, so initially it meant that leased lines were a prohibitive cost factor. Being miles from the nearest BT exchange meant VoIP calls over ADSL was also not a reliable option.
The migration picked up the pace when their local exchange finally implemented broadband in the area. This allowed Kirker Europe's offices to dramatically increase concurrent call volume and start saving on costs of calls with a fully VoIP solution, provided by VoIPOffice™.