User Manual

Application layers
8-54 Confidential - For internal use 99-137719-D
The RM will discard any data received if the receiving end is not ready to
receive/accept the data. For example if the board processor transmits data on a specific
tunnel port which has not been opened by the application processor.
8.5.8 Debug shells
The BGAN XL Radio Module implements a simple character-based interface which
enables a Telnet client on the data interface to communicate with a client shell (or
other character based interface) in the control-interface master.
8.5.8.1 Overview
The Telnet server implementation in the BGAN XL Radio Module handles the Telnet
session and forwards the Telnet data between the Telnet session and the debug shell
ports of the control interface. This is illustrated below:
The mapping of the Telnet port to the control interface port is listed below:
Important
The current release only supports one TCP and UDP tunnel. Four data
tunnels will be supported in future releases.
Figure 8-28: Message timeout handling
Telnet port Control Interface port
125 4
126 126
127 127
Table 8-100: Mapping of Telnet ports to control interface ports
Message Direction Summary Reference
MSG_DBGSHELL_DATA In / Out Contains character data 8.5.8.2
Table 8-101: Debug shell protocol message of the control interface
Master
BGAN XL Radio
Module
’hello’
’hello’
Shel l (char acter
based inter face )
Data Interface user
Telnet ser ver
Telnet client
OPEN
’hello’
’hello’
CLOSE
Contr ol Inter face Data Inter face