ADTRAN 1200063L1, Manual

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Chapter 9. Configuring Dial Options
9-4 DSU III TDM User Manual 61200063L1-20
Setting the Local Directory (LOC) Number
For ISDN dial backup, the local directory number (LOC) must be entered
in Stored Number 10. The LOC is assigned by the telco.
Dial Backup Options for All Models
The DBU O
PTIONS
are used to select the modes of operation for the dial
backup features, such as under what conditions the unit enters dial back-
up, and how the unit responds to a change in one of the dial backup con-
ditions. There are 11 standard options available with additional options
for specific backup services.
Automatic DBU
If A
UTOMATIC
DBU is enabled, the DSU III TDM enters dial backup auto-
matically when one of the conditions for backup exists. If A
UTOMATIC
DBU
is disabled, dial backup mode must be entered manually. The factory de-
fault setting is
D
ISABLE
.
Number to Dial
The N
UMBER TO
D
IAL
option offers a selection of stored numbers for the
unit to automatically dial. If the leased line fails, and the DSU III TDM is
set to originate, it dials the number specified under this option to set up
the dial backup line. The factory default setting is
D
IAL
S
TORED
#1 .
Originate/Answer
This option specifies whether the DSU III TDM is the originate end or the
answer end for dial backup operation. One end must be set to
O
RIGINATE
and the other to A
NSWER
. The factory default setting is A
NSWER
.
When Out of Service (OOS)
When enabled, the DSU III TDM enters backup mode when an out of ser-
vice or TDM out of sync condition is detected. The factory default setting
is
E
NABLE
.
No Receive (RX) Signal
When enabled, this option allows the DSU III TDM to enter backup mode
when a loss of signal is detected. The factory default setting is
E
NABLE
.