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Page 438 of 504 Appendix C: Meridian Modular Telephones add-on modules installation
553-3001-367 Standard 3.00 August 2005
Figure 85
Flowchart for troubleshooting MCA
Power up
LED check
LED lit
Attach
RS-232 cable
to DTE
LED lit
MCA bad
Distinctive flash
Telephone bad
(A44-A64 interface check)
<cr>
No menu
AT
<cr>
No AT
echo
P66
KBD
<cr>
Enter number or
H for help
No menu
P28 (Note)
<cr>
MCA
bad
Call connected
Type few characters
Echoes characters
No echo
MCA bad
MCA good
Note:
If equipped with display,
check with P62 whether it is
Terminal mode or Host mode.
553AAA0649
Set to remote loopback mode
M <cr>
R <cr>
Remote loopback: Y <cr>
Q <cr>
or program P38 (when
equipped with display)
<cr>, dial data DN