Alcatel-Lucent 9500 MXC User Manual page 399

3DB 23063 ADAA - Rev 004 July 2007
Item Description
Selection of Auto (default), Standard or Legacy is provided in the RAC 40
modem profile panel in the RAC 40 Plug-ins screen. See below. These
selection options are designed to support RAC 40 to RAC 40 operation during
SW upgrades (one end is upgraded before the other):
• The Legacy setting is used where a RAC 40 (SW 4.0 or later) must
communicate with a RAC 40 using SW 3.3 or earlier.
• The Standard setting is used where a RAC 40 (SW 4.0 or later) must
communicate with a RAC 40 operating on SW 3.4, 3.5, 3.6, or 3.7.
• The Auto (default) setting is used where both ends are running 4.0 or later.
• A RAC 40 will continue to use its prior modem profile, even when upgraded
or when an INU/INUe is power-cycled.
Upgrade Process:
The upgrade processes supported by this SW capability are as follows. In all
cases, after SW is updated to 4.0 or later, the modem profile setting on the RAC
40 Plug-ins screen will have Auto as its Configured Modem profile, but its
Current Modem Profile will be the profile used with its previous version of SW
until both ends are upgraded to 4.0 or later, whereupon the Auto selection will
ensure both ends negotiate to a Current Modem Profile of 'Standard'.
Tip: RAC 40s should be left in the Auto (default) mode in all instances
except that where a link must be repaired - refer below to the
application for repairing a link running 3.3 on one end and 3.4 to 3.7
on the other.
Upgrading one end of a 3.3 link to 4.0:
With one end upgraded to 4.0, the upgraded end will continue to use the
Legacy modem profile to ensure continued operation. This means it is
possible to upgrade one site in a network without upgrading the entire
network.
9500 MXC User Manual
Vol. IV-7-9