Nortel Meridian 1 Series, Описание

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Page 42 of 64 Attendant console operation
553-2201-117 Standard 10.00 January 2002
The failure codes produced by the firmware are bit-significant, as follows:
In most instances, the failure code accurately identifies the faulty hardware
component. However, if the microprocessor is faulty, the readings may be
unreliable or misleading.
Failure code 90H is always shown if the loopback test has not been
performed. Refer to “Data Port” on page 37.
0EH A key in column E is stuck. Same as for 08H .
0FH A key in column F is stuck. Same as for 08H .
C0H The SRC micro is not
responding. Same as for 20H .
90H The RS-232 port has failed
the loopback test. Check to see if the loopback connector is
inserted. If not, insert it and perform the
loopback test again. If the failure code still
appears, turn the console off and on while the
connector is inserted. Redo the loopback test.
If the failure code still appears, the console is
faulty and should be returned.
88H The EPROM, U18, does not
contain the correct ID, or is
faulty. Same as for 20H .
B7 B6 B5 B4 B3 B2 B1 B0
0 USART RTC RAM KEYS c2 c1 c0*
1 SRC BLF RS232 EPROM 0 0 0
* Refers to key’s column number.
Table 3
M1250 failure codes (Part 2 of 2)
Failure code Reason What to do