Motorola MCP750 Installation And Use Manual page 29

Hardware Preparation and Installation
1
1-12
Headers J8 and J9 are used to configure Serial Port 3 and 4, respectively,
in tandem with SIM selection. With a jumper across pins 1-2, the port is
configured as a DTE. With a jumper across pins 2-3, the port is configured
as a DCE. It is important to note that the jumper setting of the port should
match the configuration of the corresponding SIM module.
J8
1 2 3
DCE
J9
1 2 3
DCE
When installing the SIM modules, note that the headers are keyed for
proper orientation.
For further information on the preparation of the transition module, refer
to the user's manual for the TMCP700 (listed in
Documentation).
The next three figures illustrate the MCP750 base board and TMCP700
transition module with the interconnections and jumper settings for
DCE/DTE configuration on each serial port.
J8
Serial Port 3 jumper settings
1 2 3
DTE
J9
Serial Port 4 jumper settings
1 2 3
DTE
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