Programming instructions

107
Upgrades and FRUs
• You must purchase compression licenses before adding a DSP
module for compression.
• Upgrading to 64 compression channels requires a minimum 300 MHz
controller (see “Upgrading to a 300 or 450 MHz Controller”, page 102).
• If you are adding compression to a 100-user controller with a Single
or Dual Telecom DSP in slot 3, you must first move the Telecom DSP
to slot 4.
Telecom notes:
• Telecom resources are assigned from the highest-numbered slot.
The first Telecom DSP in an MX or 100-user controller is in slot 4. The
first Telecom DSP in an LX or 700-user controller is in slot 8.
Perform this step if the system needs compression channels and/or 30
voice mail ports and/or increased telephony resources to support more
TDM devices (see “Hardware Part Numbers” on page 365 for the part
numbers of the DSP modules).
To determine the number of DSP modules required in a system, use the
formula in Table 5 on page 105 or Table 6 on page 106 Table 7 on
page 108.
• LX controller ships with two Quad DSP modules
• MX controller ships with one Quad DSP module
• MXe controller ships with embedded DSP equivalent to two Quad DSP
modules (sufficient to support a 400-user system).
• CX and CXi controllers ship with a Dual Embedded DSP on the main
board. The T1/E1 Combo also includes DSP resources.
Tip: Voice mail ports support G.711 and G.729a compression. This applies
to all types of voice mail ports, including RAD, Music on Hold, Auto Attendant,
and Record-a-call.
Tip: Make sure you have the appropriate compression license before
installing DSP modules for compression.
Tip: In the following scenario, the call will not be compressed when going
through the second controller: a call originates in a Release 5.0 or later
controller with compression OFF, through a Release 4.1 controller with
compression ON, and terminates at a Release 5.0 or later controller.