We are new to this forum. We are the group of experts in telecom domain for SS7/Sigtran, GSM MAP, Camel (IN), SMPP, Diameter and Voip. Please have developed our in house products over commercial as well as on open source. Few products are , USSD gateway platform, GSM HLR, SMSC etc. As there are on opensource as well , so it is a lost cost and quick soultion for service providers.