Respected All, i am newbie to join this group. i want to know about the class 4 soft switch functionality with openser. can anybody guide me that, can openser [ with combination of some other tools] work as softswitch. which has all basic function of class 4. As for internet sources i come to know that, open ser had capacity of handling more than 1000 concurrent calls per second. having doubt on it. but now want to implement so my doubt get clear. pl any small help or suggestion will be thankful to me. Best Regards, Ashi.