ost of the BB. Calls in Asia use the FLEX protocol developed by Motorola , which mainly uses the 900MHz frequency band for one-way message transmission. Therefore, it must rely on the call center as a transmission medium. In the early days, it completely relied on a large number of manual answering and dictation, and later only gradually replaced by the system.
BB. Call initially relied on a lot of manpower to deliver messages At the very beginning, BB. Call did not have Special Database a screen display and only relied on voice prompts. This type of BB. Call had to rely on a lot of manpower to deliver messages through the calenter the text manually, or the user can go to a specific web page to enter the text, and the other party's BB. A plain text message delivered to the other party.
These evolutionary processes pro