Dolby Laboratories DP503 - Manual (Page 44)

5-8
5.3 ISDN Setup
(for Dolby Fax applications only )
Note: An overview of Dolby Fax principles is described in Section 2A. Detailed ISDN ordering
information (for North America) is described in Appendix D.
Important: Be sure you have installed the complete Dolby Fax system per the previous section, including
connection of the ISDN lines to the ISDN unit. Otherwise, you will encounter an error message at the final
stage of this procedure.
Before using a Dolby Fax system for the first time, it is necessary to go through the
ISDN Setup procedure on the DP503 to correctly interface the ISDN unit to the phone
company switch and to have the unit recognize the ISDN line(s). Since not all
telephone companies have the same requirements for phone number entry, verify the
proper method with the installer or sales person. Requesting the following
information will make the installation easier: Switch type; whether a SPID is used
(Service Profile Identifier); whether one or two phone numbers are required per BRI
line. For more specific information in North America, refer to the ISDN ordering
guide in Appendix D.
Upon power-up, the DP503 will go through a self-test sequence. Two screens showing
software revision levels will appear; then the default encoder configuration screen will
be displayed. It will look similar to the following:
AC2 256 2C 48 12
Algorithm Data Channel Sample Aux
Type Rate Mode Rate Rate
If you have already used the navigation keys to reach another screen, and do not see
the display above, press the ESC key enough times so that you do. The actual values
displayed will depend on the previously defined state, if you or someone else have
already saved a different encoder configuration.
Tip: If you encounter the UPDATE TA? Y N screen, enter No by pressing the
Æ
arrow key so that the
cursor is below the character N and then pressing ENTER.
5.3.1 Entering ISDN Setup Mode
Begin the process of ISDN setup by pressing the SHIFT and DIR keys sequentially.
Yellow LEDs confirm operation; the one associated with ISDN Setup will remain lit.
You will then see the following main ISDN Setup screen:
SW L1 L2 L3 L4
Algorithm Data Channel Sample Aux
Type Rate Mode Rate Rate
MAIN