Motorola C550 ユーザーズマニュアル

6 
Network API  
 

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6 

Network API 

Network Connections 

The J2ME platform on the Motorola C370, C450, and C550 series of handsets provides a 

variety of networking functionalities beyond those specified in MIDP. The additional 
networking protocols are added through the Generic Connection Interface in order to 

simplify the interface to the application as well as to reduce the need for additional 
classes. Most of the additional network connections are invoked using a runtime 
parameter similar to HTTP, reducing the learning curve for developers as well as the 

reducing potential application porting efforts.  The following is a list of networking features 
for the Motorola C370, C450, and C550 series of handsets: 

• 

HTTP 

• 

TCP Sockets 

• 

UDP Sockets 

The standard networking protocol specified in MIDP 1.0 is HTTP.  Although HTTP is 

useful and flexible for most data exchanges, many of the applications fall outside the 
standard request/response models of most browsers. Applications such as games and 

stock tickers require networking protocols with different characteristics. In order to 
accommodate these types of applications with reasonable efficiency, additional protocol 
stacks including UDP and TCP Sockets, have been added.  These added networking 

functionalities not only provide the application developer with more communication 
options, it alleviates the need to perform inefficient workarounds for a strict HTTP 

environment. Other applications may also choose to take advantage of the bottom 
connector on the devices.