PioneerPOS G24-LC Manual De Usuario

 displays the system overview which comprises the 

following links and layers:

Physical layer links:

The terminal is connected to the G24-L using a physical RS-232 connection.

The G24-L is connected to the GGSN using a GPRS link.

The GGSN is connected to the Internet via some sort of physical connection (usually 
telephone or cable).

Point-to-point layer links:

AT command protocol is used to transfer data between the terminal and the G24-L.

After authentication, the G24-L is linked to the GGSN using PPP protocol.

The GGSN is connected to its Internet service provider using some protocol.

TCP / UDP layer:

The G24-L can transfer data with the WEB using either TCP/IP or UDP/IP protocols.

The protocol stacks in the terminal or in the OEM must be managed when using TCP/IP or 
UDP/IP protocols. The G24-L software can manage these stacks internally. This enables the 
G24-L to relieve the terminal from the job of managing these protocols.

Currently, the embedded TCP/IP feature may be used only for mobile-initiated 
connections. The embedded. TCP/IP feature cannot listen on a port for incoming 
connections.

The audio (digital and analog) feature in the G24-L module involves three main issues: path 
(routes the current input and output devices), gain (volume management) and algorithm. For 
more information, refer to 

The following algorithm related features are provided:

Sidetone reduces the microphone audio input that is routed to the selected speaker so that the 
person speaking can hear himself or herself talking. This creates a slight echo because the speaker