Instruction manual

INTUITY Messaging Solutions Release 4
MAP/5P Maintenance 585-310-186
Issue 3
October 1997
Diagnostics
Page 2-37Conducting Diagnostics
2
Figure 2-30. Register Dump Window
Conducting Diagnostics
There are two options on the Diagnostics portion of the Megaport and Megaplex
Configuration and Diagnostics screen (Figure 2-25
):
■ Loopback
■ Send
These tests are intended for the experienced user. The Loopback test is
designed to diagnose the board’s primary components and their functionalities.
There are two types of loopback tests: internal and external. The Send test simply
writes a continuous stream of data to the specified port, which is helpful in
resolving wiring issues.
Serial Port External Loopback Test
Although the option for the serial port external loopback test appears on the
screen, this option is not available. Use the internal loopback test option instead.
Serial Port Internal Loopback Test
The internal loopback test is the same as the external loopback test except that it
does not require that the transmit and receive pins be wired together. Because it
does not test the full cabling of the port, the internal loopback test is not as
thorough as the external loopback test.