... are supported for VoIP business operation, such as Call through, Call back, Calling card, Call shop, Call center, Fax over IP, etc. More and more ... Supported It provide various services, for example, callback, call shop, calling card, call center, Fax over IP, etc. The service-orient architecture ... series also can be use as ‘FAX server’, it can handle FAX and Voice at the same time, perfect fit for ...