3300 ICP Controller Units
Description
The 3300 ICP Controller contains the logic, processor, memory, communication interfaces, and
call control software for managing call processing on the system.
Controller Types
• AX Controller (see page 10)
• MXe Controller (see page 13)
• MXe Server (see page 16)
• CX Controller and CXi Controller (see page 18)
• CX II and CXi II Controller (see page 21)
The Controller consists of the following main components:
• Real Time Complex (RTC): stores Call Control software and provides main control (in the
MXe Server, the RTC is the Media Gateway)
• Ethernet to TDM (E2T): converts Time Division Multiplex voice streams to IP packets.
• Mid-plane: a circuit board that holds functional circuit blocks such as Ethernet devices and
LEDs
• Echo Canceller: provides echo cancellation on IP calls.
• Quad Digital Signal Processor (DSP): provides telecom functions and G.279 compression
• Hard Disk (CX/CXi/MXe/MXe Server): stores database and configuration data.
• Compact Flash (AX): stores database and configuration data.
• System i-Button: contains a unique serial number that identifies the controller for licensing
purposes. All controllers except the MXe Server use this; the MXe Server uses an internally
calculated Hardware ID.
• Firewall (CXi, MXe, and MXe Server): secures the WAN port against unauthorized access
by dropping or rejecting unknown packets, allowing or disallowing IPSec and PPTP
pass-through, and performing many-to-1NAT (IP masquerading)
The WAN port and firewall in the CXi, MXe and MXe Server is intended to be used either
as an access point for performing remote diagnostics and maintenance (similar to a
MODEM) or, if the Firewall function is disabled, as internal router to transparently route
packets between the WAN port and the controller's LAN ports.
Note: Refer to the Release 7.0 version of the Hardware Technical Reference Manual
for details on the older controllers; 100-user, 250/700-user, LX, and MX.
Note: The WAN port and internal firewall should only be used as a network router in
situations where the amount of internet access is very low. For most installations, the
Administrator should employ a dedicated internet router/firewall.
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