We are selling a prepaid card in Tokyo, customers who buys our card will have to register and to register you have to dial a certain phone number. This is where Bayonne plays its part, an IVR will handle the call, determine the caller id, check if the customer is already registered or not, it can also handle reloading of balance. For example if customer reaches its minimum balance and wants to reload etc..Actually we were quite satisfied with what it can do, it can also call and run external scripts and its really reliable. But then new requirements came, we were asked to scale the project, to include call queuing, conferences,voicemail,call recording and some othe PBX functionality and to top it all we will be selling a new product and this product should have its own system. At first we are still willing to make it work with Bayonne, we did some researched and checked if we could hacked it, but then there was not enough support. Thats when we decided to switch from Bayonne to Asterisk and we are glad that we did.