Running the Mitel Communications Director (MCD) software, Mitel offers a family of 3300 Controllers which allow the system to be deployed into many varied environments. The family comprises the:

The 3300 CX and CXi Controllers, which can be deployed for the smaller business, or as part of the enterprise edge for large networks - in this capacity, the controllers can either be deployed as a survivable branch solution for centralized deployments, or as a dedicated PBX operating as part of a larger distributed network.
The MXe Controller, which offers greater scalability in terms of user and trunk capacity, and also offers hard drive and power redundancy.
The MXe Server, which can operate as a high density user controller for larger enterprise deployments.
The AX Controller, which is ideal for high density analog requirements, either as a stand-alone solutions, or as part of a larger network deployment.

1. MXe II - Medium Switch - Embedded
	Maximum 1400 users VoIP (IP/SIP) 4 FD Per 8 NSU (PRI, E1, Qsig) 4 ASU embedded Analog Main Board can be fitted with a redundant power supply and redundant hard drive

2. CX II - Compact Switch
	150 Users VoIP (IP/SIP) Shipped with (standard) - 4 analog extensions and 6 analog trunks 16 powered data ports Provides PRI / QSIG / T1-D4 / DPNSS Protocol through the Controller 4 Voice Mail Ports (standard)

3. CXi II - Compact Switch
	150 Users Shipped with (standard) - 4 analog extensions and 6 analog trunks 16 powered data ports Provides PRI / QSIG / T1-D4 / DPNSS Protocol through the Controller 4 Voice Mail Ports (standard) 16 Port Layer 2 Switch Internet Gateway Firewall

4. AX - Analog Switch
	100 IP Users 288 analog devices Ideal where a high density of analog devices is required.