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COMSPHERE 3800 Series Modems
5-4 November 1996 3810-A2-GB30-20
Dial Standby/Return to Dial
The Dial Standby and Return to Dial functions appear
on the LCD only after the Model 3810 or Model 3811,
operating on leased lines, is placed into dial backup. Once
the modem is operating in Dial Backup mode, these
functions allow the modem to be switched back and forth
between dial and leased-line operation while still
maintaining the dial connection. See Figure 5-1.
(Switching between dial and leased-line operation can be
performed manually or automatically by enabling the
Auto Dial Standby configuration option.)
For example, under normal dial backup conditions,
when a problem occurs on the leased line, the modems
establish a connection over the dial network using a
telephone number stored in directory location 1.
F1
Call Setup:
Dial Standby
F2
F3
When this occurs, the Dial Standby function now
appears on the LCD. By selecting this function, the
modem switches back to the leased line while still
maintaining the dial connection. As a result, the Return to
Dial function now appears on the LCD instead of Dial
Standby.
F1
Call Setup:
Return_to_Dial
F2
F3
If
the leased line is found to be unacceptable, select
Return_to_Dial which switches the modem back to dial
network operation (LCD displays Dial Standby). If,
however, the leased line is operating properly
, you can
select Disconnect from the Call Setup branch and drop the
dial-line call.
NOTE
When the Model 3820 is
configured for leased-line
operation, this function is not
available and is not displayed on
the LCD.
To access Dial Standby or Return to Dial from the Call
Setup branch, make the following selections:
F1
Call Setup:
Dial Standby
F2
F3
Press the key until Dial Standby or Return to Dial
is displayed. Select the appropriate function.
496-13081-01
MODEMMODEM
LEASED-LINE
FAILURE
XX
DIAL BACKUP LINE
DIAL
STANDBY
RETURN
TO DIAL
Figure 5-1. Dial Backup