Our call center does 25,000 calls per week, all on Globalfone Asterisk based system.....
Lourdes Sotolongo, General Manager http://www.PowerOfVoices.biz

We have 5 stores and headquarters, with free calls between all....
Amado Aracena, Metropolitan Lumber

Fax To Email works great !
SL Green Realty

Our GlobalFone calling card system is IP in IP out.....
Michael Elias, http://www.MacGlobalTalk.com

Call quality met highest standards for high end NY realty company
Jill Kosow, Citi Habitats

Voice quality is superb, 30 seat luxury realty company
Daniel Shamooil, Homestead NYC Realty

Screen pops work great, insurance corporate office
Jim Hollman, partner
http://www.FocusInsurance.net

Excellent quality even with free softfones, in Real Estate management office
Brian Alconaba, Manager
http://www.HeightsRE.com