Filter
Top Products
COMSPHERE DualFlow Data Service Units
4-8 December 1996 3615-A2-GB20-20
NOTE
Auto Backup
and
Auto Restor
should not be enabled if
DTRCallCon
is enabled (set to
Orig or Ansr).
• Bckup
Dir
– Select the call directory identifier
(1 to 10) stored in the DBM’s Backup Directory for
the telephone number to be dialed.
• AutoRestor – Select Enab.
When enabled, the DBM automatically restores
data to the DDS circuit when service is restored and
the amount of time set in RestoreTimOut
has
expired.
• NtwkTimOut – Set the amount of time that the
DDS circuit must be out of service before a backup
attempt is made:
from 0:00 (minutes:seconds) to
29:59 (the default is 0:20).
• RestorTimOut – Set the amount of time that the
DDS circuit must be back in service before
automatic restoration is attempted: from 1 to
60 minutes (the default is 5 minutes).
• TriesTimeOut – Specify the overall time limit
during which a DBM attempts to establish a dial
backup call when
Auto Bckup
is enabled or when
raising DTR initiates a call attempt: from 1 to 60
minutes (the default is 15 minutes).
• MultiCall – Select Disab.
When enabled, instead of following the normal
calling cycle, the DBM cycles through all dial
strings contained in its Backup Directory until a call
attempt is successful.
Do not enable MultiCall unless more than one
telephone number is in the Backup Directory and
each successive (i.e., 1, 2, 3, etc.) telephone number
is different from the previous entry. Directory
entries should be unique.
Understanding Operating Modes
The Backup branch controls operation of the Dial
Backup function. The DualFlow DBM has three modes of
operation:
• In Idle mode, there is no dialed connection. The
DDS circuit is active and carrying user data.
• In Standby mode
, the unit has a dialed connection
to another DBM or compatible dial backup unit, but
has not connected line data to the DBM’
s DTE port.
• In Dial Backup mode
, the dialed circuit is active
and carrying user data and diagnostics.
T
able 4-2 lists the Backup branch operating modes and
explains the ef
fects of each backup command.
Table 4-2
Backup Branch Menu Selections
Current
Backup Mode
Backup
Command
Effect
Idle Bkup
Dial
Dial out, establish, and switch to dialed link (Dial Backup mode).
Dial out and establish dialed link (Standby mode).
Standby Disc
→Cnnct
Disconnect dialed link (Idle mode).
Connect the DBM line data to DBM’s DTE port (Dial Backup mode).
Dial Backup DrBU
→StnBy
Disconnect dialed link and switch to private line (Idle mode).
Disconnect the DBM line data from DBM’s DTE port (Standby mode).