Standard Dbu Options; Automatic Dbu; Number To Dial; Originate/Answer - ADTRAN DSU IV ESP User Manual

Chapter 9. Configuring Dial Options

Standard DBU Options

Automatic DBU

The A
automatically enters dial backup mode or waits for manual setup.
The factory default setting is D

Number to Dial

The N
the unit to automatically dial. If the leased line fails, and the DSU
IV ESP is set to originate, it dials the numbers (in chronological
order) specified under this option to set up the dial backup line.
The factory default setting is D

Originate/Answer

The O
originates or waits to answer if the dedicated circuit fails. One end
must be set to O
default setting is A

DBU Criteria for Entering Dial Backup Mode

These options specify the conditions that will cause the DSU IV ESP
to enter the backup mode.

When Out of Service (OOS)

When enabled, the DSU IV ESP enters backup mode if an out-of-
service condition is detected. The factory default setting is E

No Receive (RX) Signal

When enabled, the DSU IV ESP enters backup mode when a loss of
signal is detected. The factory default setting is E

No Sealing Current

When enabled, the DSU IV ESP enters backup mode when a loss of
sealing current is detected. The factory default setting is E

When all 1s/0s

When this option is enabled, the DSU IV ESP monitors the receive
data for strings of 1s or 0s that are longer than the Fail Timer. If this
9-6
DBU option specifies whether the unit
UTOMATIC
D option offers a selection of stored numbers for
UMBER TO IAL
option specifies whether the DSU IV ESP
/A
RIGINATE NSWER
and the other to A
RIGINATE
.
NSWER
DSU IV ESP User Manual
.
ISABLED
W #1.
IAL ITH
. The factory
NSWER
NABLE
.
NABLE
.
.
NABLE
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