Echo Canceller Module
The Echo Canceller (EC) module provides echo cancellation on Ethernet to TDM (E2T)
channels. Each bi-directional E2T channel requires one bi-directional EC channel. The EC
module is available in 64-channel and 128-channel versions.
The 100-user and the MX controllers have embedded echo cancellers and do not require EC
modules. The MXe Server ships with two 128-channel echo cancellers. The 250-user controller
is shipped with one 64-channel EC module that will handle the full capacity of the system. The
700-user and LX controllers require 128 channels of echo cancellation from either two
64-channel modules (if upgraded from 250 to 700-users) or one 128-channel module.
The AX controller uses DSP echo cancellers (40 channels in number) in its default configuration,
but can use the 128-channel module to increase capacity (hardware echo cancellers replace
the DSP echo cancellers). When the 128-channel module is installed, the echo canceller
channels on the embedded DSPs revert to telecom resource use.
The CX/CXi and CX/CXi II controllers do not use the echo canceller modules.
Quad Copper Interface Module (CIM)
Description
The 3300 ICP controller, with Release 7.1 or later software, supports the Quad CIM MMC for
connection to an Analog Services Unit, Universal ASU, or ASU II. One or two (only one on the
CX) Quad CIMs can be installed in any 3300 ICP controller (except on the AX and MXe Server)
to provide for connection to a maximum of 12 ASUs, with the exception of the CX and CXi
controllers, which will support only the first 3 ports of the Quad CIM module.
Figure 12: Quad Copper Interface Module (CIM)
Note: The MXe Server has 4 CIM ports, but they are not operational. The LEDs will
continue to flash.
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