Aria Telecom 4 port gsm Gateway to IP Gateway is a very efficient solution to connect GSM/CDMA SIM with your EPABX or Dialer, product is very populer in call center & office use .The gsm Gateway is designed for comfort, ease-of-use & cost effective communication with your clients. It is not only used in call centers but very usefull in office communication to reduce the cost. Aria Telecom gateway is compatible with Asterisk & other SIP PBX.