Asterisk and a2billing Trunk using HUAWEI E1550\E1750\E173

Description Running asterisk 1.6 Would like to run 100+ USB sticks as asterisk trunks The stick I have is the E1550\E1552 They will be connected 10 per USB hub A2billing Customize, Add interface admin and customer for Send single or bulk SMS, Add Interface admin for send USSD for selected huawei modem trunk. Custom a2billing trunk can set credit limit usage per trunk. Must be able to Send call Receive Call Send USSD Write all received ussd to a file in form of ussdreccurdate() must keep track of the stick so if i exchange usb ports we must follow the stick, i suggest we create a db with trunk_name and imei_number Once you get this project to work, you must do a writeup of all steps. I also need a module to change the device IMEI number