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IQ 310 System Manual
Section 6, CFG-3
DBU Options
1. From the CONFIGURE DIAL BACKUP screen (Figure 22), select option 2, DBU OPTIONS; then press
<ENTER>. The screen similar to Figure 23 will appear. The default parameter values for this screen are
shown.
Figure 23. DBU Options Menu
For basic dial backup operation, these parameters do not need to be altered from their default values.
The ANSWER ALWAYS option must work in conjunction with the AUTO DBU option. The AUTO DBU
option is still the controlling option. If AUTO DBU is disabled, the unit will not answer the call
regardless of how ANSWER ALWAYS is set. Examples of the various combinations and expected results
are shown below.
Signaling Type
Auto
DBU
Answer
Always
Result
ANSI T1.617-D/LMI/ITU-T Q.933-A
Enabled
Enabled
Unit will answer an incoming call.
ANSI T1.617-D/LMI/ITU-T Q.933-A
Enabled
Disabled
Unit will not answer an incoming call.
ANSI T1.617-D/LMI/ITU-T Q.933-A
Disabled
Enabled
Unit will not answer an incoming call.
ANSI T1.617-D/LMI/ITU-T Q.933-A
Disabled
Disabled
Unit will not answer an incoming call.
In addition, the ANSWER ALWAYS feature must work in conjunction with the ORIGINATE/ANSWER
feature. The ORIGINATE/ANSWER feature only appears when the unit is programmed for a non
frame-relay circuit (signaling none). If ANSWER ALWAYS is enabled (and AUTO DBU enabled), the unit
will answer the call even if it is set to ORIGINATE. Examples of the various combinations and expected
results are shown below.
61203800L1-1A
© 2004 ADTRAN, Inc.
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