ADTRAN 1202155L1, User Manual

Page: 87 / 146

Chapter 5. Configuration Menu
61202156L2-1 TDU 120e User Manual 5-25
Dial Backup Config
Under DBU C
ONFIG
, the menu items are:
Backup Mode
In a backup condition, both ends of the circuit must
detect backup conditions before backup is activated.
One DBU is set to
O
RIGINATE
and the other to
A
NSWER
. Upon a network failure, only the Originate
DBU initiates backup by dialing the A
NSWER END
.
Once called, the A
NSWER
DBU goes into backup
mode only if a backup condition is detected. This is
ideal for controlling where calls originate.
Choices:
D
ISABLE
, O
RIGINATE
, A
NSWER
Backup On
Selects the conditions that cause the Nx/DBU to ini-
tiate Backup.
NET FAIL
Backup occurs on R
ED
A
LARM
, Y
ELLOW
A
LARM
, B
LUE
A
LARM
and LOS .
Table 5-1. Normal Mode of Operation
RTS V.54
Loopback 511 TST
ON Self Test
Active Netwk Test
Active No DS0
Mapped Network
Alarm
CTS Follows OFF OFF OFF OFF OFF
DCD — — OFF — OFF OFF
DSR — OFF OFF OFF OFF —
Where “—” = don’t care
Force On = On under all conditions
This table indicates conditions which cause the P
ORT
C
ONTROL
S
IGNALS
to be deactivated.