AT&T MERLIN LEGEND Release 3.1 Maintenance And Troubleshooting Manual page 421

Index
B
B-Channel Loopback Test
error messages, table, 4-60
interpreting results, 4-59
procedure, 4-57–4-59
results, 4-79–4-86
summary, 4-56–4-57
Behind Switch mode, 1-27
Board Controller Test
error messages, table, 4-55
LEDs, 4-54
procedure, 4-52–4-55
results, 4-55
summary, 4-52
BRI, see Basic Rate Interface (BRI)
Busy-out
Digital Subscriber Line (DSL), 5-18–
5-20
extension, 5-16–5-18
overview, 4-38–4-39
procedure, 4-39–4-41
summary, 4-39
trunk, 5-12–5-16
C
Call Forwarding feature, 3-5
Canadian Department of
Communications (DOC), A-2
Carrier
removing, 4-106–4-7
replacing, 4-107
types of problems, 4-106
Central office, checking problems, 1-26
Circuit module firmware
upgrading
error conditions, 4-70–4-74
procedure, 4-65–4-70
IN–2
Maintenance and Troubleshooting
summary, 4-64
Circuit module firmware, upgrading
overview, 4-63–4-64
Circuit pack, 3-1
Clock status
100D module, 4-90
800 NI-BRI module, 4-90–4-91
Cold start, 1-21, see Restart
Control unit
housing
installing Release 2.0 or earlier,
5-40–5-42
installing Release 2.1 or later,
5-36–5-39
removing, 1-15–1-16
power supply problems, 4-2–4-11
powering down the system, 4-1–4-2
processor problems, 4-12–4-33
ring generator, 4-4–4-7
WARNING, 4-1
CSU Loopback Test
error messages, 4-100
procedure, 4-93–4-99
restoring module, 4-101
results, 4-99–4-100
summary, 4-92–4-93
D
Dial tone, 3-8
DID, see Direct Inward Dialing (DID)
Digital Subscriber Line (DSL)
busy-out, 5-18–5-20
maintenance-busy status, 5-12–5-13
restoring, 5-24–5-26
Direct Inward Dialing (DID) module
Touch-Tone Receivers, 3-10
Direct Inward Dialing (DID) modules
power requirements, 1-26–1-27
Direct Station Selector (DSS), 3-6