Specifications

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CHAPTER 9: Configuring Dial Options
Table 9-2 (continued). DBU Options AT Commands for All Models
Front Panel AT Command Description
1=Disabled _H0 No DBU when RX signal absent
2=Enabled _H1 DBU when RX signal absent
NO SEALING CURRENT
1=Disabled _I0 No DBU when sealing current absent
2=Enabled _I1 DBU when sealing current absent
WHEN ALL 1S/0S
1=Disabled _P0 No DBU when all-1s/0s detected
2=Enabled _P1 DBU when all-1s/0s condition exists
ANSWER ALWAYS
1=Disabled none Answer unit answers only under
specified conditions.
2=Enabled none Answer unit answers any incoming
call regardless of failed condition.
WEEKEND LOCKOUT
1=Disabled none Disables weekend lockout feature
2=Enabled none No backup occurs from midnight
Friday to midnight Sunday
DAILY LOCKOUT
1=Disabled none Sets dial-backup lockout starting
hour
2=Enabled none Sets dial backup lockout ending hour
LOCKOUT START none Sets hour to enable dial backup
LOCKOUT END none Sets hour to disable dial backup
Auto Restore S31=x Sets restore timer
Redial Counter S57=x Sets redial counter
Fail Timer S58=x Sets fail timer
Wait to Redial S59=x Sets time between redial attempts
9.3.2 DBU O PTIONS FOR S4W
Network Type
This option selects the company providing the switched digital service. When US
Sprint is selected, an automatic echo canceler suppressor tone is emitted by the
CSU/DSU MS DBU when dialing. Options include: AT&T/MCI/Other and US
Sprint.