Alcatel-Lucent 9500 MXC User Manual page 398

Chapter 7. Node and Terminal Plug-ins
Vol. IV-7-8
Item Description
RAC 40
RAC 40s operating with a Legacy modem profile cannot operate correctly with
RAC 40s operating with a Standard profile.
• A RAC 40 operating with SW 3.3 or earlier has a 'Legacy' modem profile.
• A RAC 40 operating with SW 3.4 or later has a 'Standard' modem profile,
which was introduced to provide better performance on the horizontal plane.
• A RAC 40 operating with SW releases 3.4, 3.5, 3.6, or 3.7 cannot operate
with RAC 40s running 3.3 SW or earlier.
However, with 4.0 SW and later a capability is provided
compatibility by allowing selection between Legacy or Standard
modem profiles
running 4.0 SW or later. This capability means there will be minimal disruption
to traffic during the SW upgrade process - one end can be upgraded before the
other.
• Selection of Auto (default), Standard or Legacy is provided in the RAC 40
modem profile panel in the RAC 40 Plug-ins screen.
For more information, refer to RAC 40, Volume II, Chapter 3.
Tip: With both ends operating on SW 4.0 or later the RAC 40s auto select
'Standard'. No user configuration of the RAC 40 modem profile is
required.
Background:
Software versions before 3.4 cannot establish both V and H radio links when
RAC 40s at the other end of the link are operating with software versions 3.4,
3.6 or 3.7.
• For SW versions 3.4, 3.5, 3.6 and 3.7 only the Standard modem profile is
supported. For 3.5, 3.6 and 3.7 this is indicated in the modem profile panel
in the RAC 40 Plug-ins screen where 'Standard (RAC 40)' is indicated for
the Configured Modem Profile and also for the Supported Remote Profile.
Configured Modem Profile does not apply.
• In other words, for these SW releases there is no support for compatibility
with a Legacy RAC 40 (SW version 3.3 or earlier) at the other end of the
link. Only the Standard modem profile is supported and both ends of the link.
With 4.0 SW and later a capability is provided to support Legacy and Standard
modem profiles.
, and to auto-configure both ends to Standard when both are
to support over-air
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