Nortel Meridian 1 Manual page 201

History File, 9
I
ICM card problems (system option 21E), 58
IGS (intergroup switch) cards, 94
IODU problems, 87
IODU/C problems, 89
IPE (intelligent peripheral equipment)
See also peripheral equipment faults
L
LD 11, for defining MTA (maintenance set allowed)
class of service, 15
LD 17, for changing passwords, 13
LD 30, for reviewing and resetting maintenance
display codes, 9
LD 34, for tone and outpulse testing, 15
LD 35, for clearing fault indicators, 178
LD 135, for clearing fault indicators (system options
51C, 61C and 81), 178
LDnn
for isolating attendant console faults, 146
for isolating telephone faults, 158
maintenance overlays accessible from
maintenance telephone, 15
LED on controller cards, 124, 126
LED on fibre peripheral controller cards, 122
LEDs, 8
all off, 27, 28, 30, 32, 36, 38
defective, 168
green off on module power supply, 29, 33, 41
M
maintenance display codes
for common equipment faults, 10, 48
for peripheral equipment faults, 10, 121
maintenance telephones for system access for fault
clearing, 15
mass storage interface cards, 46
mass storage units, 46
MDU (Multi Disk Unit), 46
MDU problems, 82
memory card problems (system option 51), 63
memory/peripheral signaling card problems (system
options 21A and 21), 54
Meridian 1 system related documentation, 1
messages. See fault indicators; maintenance display
codes; system message
module power distribution unit (MPDU), 20
module power supply, 20, 21, 22, 23
MPDU (module power distribution unit), 20
MSPS card problems (system option 21E), 55
MTA (maintenance set allowed) class of service, 15
Multi User Login feature for multiple device
interactions, 13
Music-on-Hold problems, 115
N
network cards, 94
network equipment faults
call placement problems, 117
call placement problems (2500 telephones and
some trunks), 117
call transfer problems, 115
conference call problems, 115
list of symptoms, 93
loops disabled, 97, 99, 101, 103, 105, 108
Music-on-Hold problems, 115
OVD messages for disabled loops, 97, 99, 101,
105, 111
peripheral signaling card problems, 111, 113
procedures for clearing, 95
typical system messages for, 7, 96
typical user-reported problems for, 12, 96
typical visual fault indicators for, 8, 96
noise problems, 136, 166
no-ring problems (500 or 2500 models), 174
NT1P61 Fibre Superloop Network Cards, 97
NT5K12
EEPE power supply, 33
NT7R51 Local Carrier Interface Card), 99
NT8D04 Superloop Network Cards, 94, 101, 103
NT8D18 Network/Digitone Receiver (DTR) Card,
94
Index Page 187 of 190
Meridian 1 Fault clearing