Dolby Laboratories DP503 - Manual (Page 39)

5-3
SHIFT + ENTER Insert/Contrast During editing modes, inserts a space
directly above the cursor and moves
remaining text to the right. Function
self-cancels after being invoked.
Otherwise, invokes mode to enable
adjustment of LCD screen contrast.
Use
Ç
and
È
keys to adjust. Cancel
by pressing ESC,
SHIFT + DIR ISDN Setup Places unit into ISDN Setup mode for
Dolby Fax applications. See Section
5.3.
SHIFT + ESC Loopback When using the DP503 as part of a
Dolby Fax system, invokes the ISDN
terminal adapter Loopback function. If
there is no call established, loopback
is local. If a call is established,
loopback is remote.
Repeat key sequence to toggle off.
Action is confirmed by the associated
yellow LED. A slight delay is normal,
as the DP503 is actually polling the
ISDN unit for confirmation.
5.1.2 Operational Modes
There are 3 major operational modes:
N Encoder configuration
N Directory functions
N ISDN setup (for Dolby Fax applications)
By default, the display shows the encoder configuration parameters. The associated
parameter labels are silk-screened below the display.
Switching to the other modes requires pressing the DIR key for enabling Directory
functions, or the SHIFT + DIR keys to enter the ISDN setup mode. This allows the
user to access the necessary nested screens and parameters.
5.1.3 Operational Hierarchy
Behind the scenes intelligence ensures that illegal combinations of parameters cannot
be selected. Allowable values for a given parameter are based on the settings of other
parameters of higher priority. The following 3 diagrams show the priority of
configuration parameters:
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