Mitel 3300 - Conference Calls; Swapping Between Calls

3300 ICP General Information Guide
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• Dual Fibre Interface Module
• Dual T1/E1 Module
• T1/E1 Combo Card
• Quad Basic Rate Interface Framer MMC
• ETX (Embedded Technology eXtended) Module
• Analog Main Board/Analog Option Board
Quad Digital Signal Processor Module
The Quad Digital Signal Processor (DSP) Module contains four DSP devices that perform basic
telephony and compression functions including:
• Conferencing
• Voice Mail playout and recording
• Call Progression tone generation and detection
• Auto-attendant support
• G.729a compression (for IP trunking and wireless phones)
Each Quad DSP module can provide a total of 32 bi-directional channels of E2T compression.
The 3300 ICP can support a maximum of 64 channels of G.729a compression (requires an
E2T MMC with a 300 MHz or faster processor). 3300 ICPs with the 133 MHz processor can
support a maximum of 32 channels.
The system allocates DSPs as follows:
• One DSP for conferencing (at startup)
• One or more DSPs for Voice Mail depending on the number of ports programmed in the
customer database (at startup)
• DSPs for tone generation and detection as required by traffic conditions (on a per call basis).
The auto-attendant feature also requires DSP resources. The MXe controller ships with
embedded DSP equivalent to two Quad DSP modules (sufficient to support a 200-user system).
The embedded DSP resources on the MXe are sufficient to support telephony services,
conferencing and voice mail. Additional DSPs are required to support G.729a compression.
Echo Cancellation 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 MXe controller is shipped
with one 128-channel echo canceller.