0049-2702-XXX Alliance Series Modems – USER MANUAL
08/05/2010
Rev. A
Page 72 of 197
cell number will change on the DIAL CELL: screen and on the AUTO-DIAL screen. The ALX
will autodial the number stored in the currently displayed phone cell when DIAL is selected
from the DIAL CELL: screen or from the AUTO-DIAL screen.
When the local modem has successfully established a connection with the remote unit, the
TIA/EIA status screen should be present. Typically this screen will look like this:
If the modem’s LCD displays an AUTO-DIAL FEATURE message, refer to the explanations
listed below.
Failure
message
Explanation
NO DTR
DTR is not present
NO LINE CURR
Loss of line current.
LINE OCCUPIED
The data line is already in use.
DIAL NOT ALLOWED
Modem is configured for leased line operation.
Note:
The phone number stored in the phone cell identified in the upper right corner of the
AUTO-DIAL screen is the number the ALX will dial for –
•
Front panel autodial (when DIAL is selected from the AUTO-DIAL screen)
•
Dial line auto-recovery (Chapter 3)
•
Leased line auto-recovery (Chapter 3)
•
DTR dialing (Chapter 3 and 5).
AUTOMATIC FALLBACK
The ALX incorporates three automatic fallback features that can be controlled by the user:
•
Operating Mode Fallback
– Provides compatibility with modems that utilize any of
several different operating modes.
•
Two options for automatic data rate adjustment:
Rate Renegotiation Procedure (RRP)
and
Speed Fallback
– These features allow the ALX to automatically select the highest
possible data rate, depending on the signal quality.
