Table of Contents
Advertisement
11.2.7
Lookback to leased line:
If the leased line is "repaired" during a dial backup, then you
normally wants to re-establish the leased line. This may be done
manually or automatically.
Manually:
=Enter escape code to the modem and wait for resultcode OK.
+t
=> Enter the following commands.
ATHefl
Disconnect the leased line connection.
Change mode to leased line.
Front control:
=>Press the LEA/SW switch. The modem disconnects, changes
operating mode to leased line and starts the handshake.
Automatically:
The modem can be configured to renter the leased line
connection continuous during the dial backup or at fixed
intervals. The +S32 register determines the delay between each
attempt.
Which of these two method to use is determined by the
configuration and the reason for dial backup.
Lookback may be set-up by AT commands or from SET-UP
menu CO23A
Function.
a
A
Lookback disabled
+&LBO
OFF
Continuous lookback
+&LB1
CONT
Interval lookback
+&LB2
INTERVAL
Both cont. and interval lookback
|+&LB3
BOTH
As described earlier in this chapter a dial backup may be set-up
after loss of carrier or after detection of inactivity in data
transmission (No data).
Selection of dial backup criteria is also important for the kind of
lookback to use.
See more about this earlier in this chapter, and
the commands +&DA and +&DB.
LZTR104006 R1.00
11-9
Zat 14.4/14.4-7 and 19.2/19.2-7
Advertisement
Table of Contents
