Mitel 3300 Technician's Handbook page 298

3300 ICP Technician's Handbook
Tip: Make sure you have the appropriate compression licenses for
compression or T.38 licenses for FAX over IP support (FAX Relay) before
installing DSP modules.
Note:Installing DSP II module(s) in an MXe controller may define one of
the 192 Channel PSTN Gateway configurations that does not allow any
embedded Voice Mail ports (see Table 57). If this DSP II module
installation is part of an upgrade to an existing system, embedded Voice
Mail must be disabled (i.e., moved to another node in the network or an
external server) before saving and restoring the database.
About the DSP II Module
In Release 9.0 and later, the DSP II module replaces the earlier DSP
modules in some applications. The following conditions apply:
• The DSP II is only supported in the MXe controller, MXe Server, AX
controller, CX/CXi, and CX II/CXi II controller.
• The DSP II supports compression (G.729a) and FAX Relay (T.38). It
has replaced the existing DSP module for compression in the MXe and
AX controllers. FAX Relay (T.38) is only supported by the DSP II
module.
• After a DSP II module is installed in the controller, compression is not
supported on any existing installed DSP modules. All compression will
be supported by the DSP II module.
• T.38 licenses take precedence over compression licenses. If the
combined number of licenses exceeds the DSP II card resources, the
T.38 licenses will be loaded first.
• To increase the number of available T.38 channels you must reduce
the number of G.729 channels.
• You can increase the number of available T.38 channels by reducing
the number of G.729 channels. To obtain the first eight T.38 channels,
you must reduce the number G.729 channels by 32. For each
additional eight T.38 channels you must reduce the number of G.729
channels by 16.
• The MXe controller now ships with AD21363 DSPs on the
motherboard. Earlier versions shipped with AD21262 DSPs on the
motherboard. The embedded DSP resources on the controller are
sufficient to support all telephony services, conferencing, and voice
mail. However, additional DSPs are required for G.729a compression
or FAX Relay (T.38) on either version.
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