AT&T AUA8 User Manual page 15

AT&T Data Sheet- Attachment
AT&T 363-005-155, Issue 1
Table 3. AUAS System Display Unit Alarms (Contd)
Alarm Description/Action
c ON PROT
A switch of dig roup C to the OS 1 protection line. If the dig roup C
force switch on the LSU faceplate was unintentionally set toward
f, move it away from f. Ignore this message if intentionally set
toward f. Otherwise, check that the line code settings (B8ZS
and ZCS) on the NE and FE LIU, and, if present, on the
multiplexers (AMI is compatible with ZCS) are the same. If the
line code settings are the same, do T1 fault locating (see
AT&T 363-200-001 ).
CH## COMP
The CU associated with channel ## (where## is an odd number
between 1 and 95) is incompatible. Check the work order or
office records to remedy the compatibility problem.
CH## FAIL
A failure in the CU associated with channel## (where## is an
odd number between 1 and 95). Replace the CU.
CKT MEM
3-way mismatch of CU provisioning memory. Remove the BCU
and insert a pin plug into the PROV TRANS pin jack on the BCU
faceplate. Reinstall the BCU. If at the RT, wait for the PRV LED
on the ADU to go out; at the COT, wait 5 minutes. Remove the
pin plug and use the CIU to verify that the provisioning data
agrees with the office records. Change corrupt data.
CTU COMP
An incompatible CTU in the dual-channel bank. At the RT,
replace the CTU with an AUB22, AUB25, or AUB30. At the
COT, replace the CTU with an AUB2B CTU.
CuAB FUSE
The AB fuse on the CFU providing -48 V DC protection to the
digroup A and B CUs is blown. Replace the fuse.
cueD FUSE
The CD fuse on the CFU providing -48 V DC protection to the
digroup C and D CUs is blown. Replace the fuse.
CUT CLR
On the RT ADU, the NORM/CLR option switch is set to CLR and
switch S2-3 is set to CUT. Not advisable since these settings
can clear memory when autocut. Correct the settings.
DON PROT
A switch of digroup D to the DS1 protection line. If the digroup D
force switch on the LSU faceplate was unintentionally set toward
f, move it away from f. Ignore this message if intentionally set
toward f. Otherwise, check that the line code settings (B8ZS
and ZCS) on the NE and FE LIU, and, if present, on the
multiplexers (AMI is compatible with ZCS) are the same. If the
line code settings are the same, do T1 fault locating (see
AT&T 363-200-001 ).
Continued
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December 1992
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