Mitel 3300 - Stratum 3 Clock Module; Description; Mxe Processor (E2 T;RTC); Digital Signal Processor Modules

Hardware Technical Reference Manual
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Stratum 3 Clock Module
Description
The Stratum 3 clock module is designed specifically for high performance use in telephony
equipment.The Stratum 3 clock provides synchronization for digital connections to external
networks. It helps ensure system reliability by monitoring its references for frequency accuracy
and stability and by maintaining tight phase alignment between redundant primary and
secondary system clocks even in the presence of high network jitter.
All of Mitel’s controllers use the Stratum 3 clock module.
The Stratum 3 clock on the CX/CXi II is embedded on the main board and not field replaceable.
MXe Processor (E2T/RTC)
The MMC-C processor runs the Real Time Complex (RTC), the Ethernet to TDM (E2T) function
or, in some controllers, both. The E2T converts voice streaming between TDM and IP. The RTC
runs the call control for the controller and acts as a gateway for the IP.
In the MXe Server, the RTC has the reduced role of Media Server, with the APC-MXe performing
call control functions.
Digital Signal Processor Modules
The Digital Signal Processor (DSP) modules contain DSPs that perform the following functions:
• Conferencing
• Voice Mail playback and recording
• Call Progression tone generation and detection
• Auto-attendant support
• G.729a compression (for IP trunking and wireless phones)
• FAX Relay (T.38)
Refer to the Technician’s Handbook and Engineering Guidelines for DSP configuration rules.
Quad DSP MMC
The Quad DSP has four DSPs and can provide 32 bi-directional channels of G729a
compression (eight for each DSP). The Quad DSP module does not support FAX Relay (T.38).
DSP II MMC
The DSP II MMC is a high-density DSP resources card and has eight DSPs. Each DSP supports
eight channels of FAX Relay (T.38) or 16 channels of G.729a compression.