Mitel System Module 2 DSPX - 20351208
The Mitel System Module 2 DSPX 20351208 is a digital signal processing resource module designed for the Mitel SMB Controller running MiVoice Business. It expands the controller's available voice-processing resources for VoIP channels, voicemail and auto-attendant ports, G.729 voice compression, and other DSP-dependent communications functions.
At least one 20351208 DSPX expansion module is required for MiVoice Business on the SMB Controller, and up to three DSPX modules can be stacked in the controller. The number of installed DSP modules is selected according to the required user configuration, VoIP channel capacity, voicemail ports, and compression requirements, allowing SMB Controller deployments to scale from typical 80-user configurations to systems designed for up to 150 users.
Key Features
- Mitel DSP expansion module for SMB Controller
- Exact manufacturer part number 20351208
- Official Mitel designation: System Module 2 DSPX
- Designed for MiVoice Business on SMB Controller
- At least 1 DSPX expansion module required
- Up to 3 DSPX modules can be stacked in the SMB Controller
- Works in addition to the controller's onboard DSP resources
- Expands available VoIP / E2T channel capacity
- Supports voicemail and auto-attendant DSP requirements
- Supports G.729 voice-compression resources
- DSP capacity scales according to system requirements
- Supports SMB Controller deployments up to 80 or 150 users depending on configuration
- Installed in the dedicated DSP position on the SMB Controller mainboard
- DSP modules stack vertically when multiple modules are required
- Mounting standoff supplied with the module
- Internal system resource module - no external voice or network ports
Applications & Use Cases
- MiVoice Business SMB Controller deployments
- Small and midsize business phone systems
- Branch-office communications
- VoIP / E2T media-channel expansion
- Voicemail resource expansion
- Auto-attendant resource expansion
- G.729 compressed voice deployments
- 80-user SMB Controller configurations
- 150-user SMB Controller configurations
- Deployments requiring additional simultaneous voice-processing capacity
- Replacement DSPX module for compatible SMB Controller systems
Technical Specifications
Product
- Product: Mitel System Module 2 DSPX
- Manufacturer Part Number: 20351208
- Accessory Type: Digital Signal Processing Expansion Module
- Compatible Platform: Mitel SMB Controller
- Communications Platform: MiVoice Business
DSP Configuration
- Minimum DSPX Expansion Modules: 1
- Maximum DSPX Expansion Modules: 3
- Installation: Stacked in Dedicated DSP Position on SMB Controller Mainboard
- Onboard DSP: DSPX Expansion Modules Operate in Addition to Built-In DSP Resources
- Runtime Allocation: DSP Allocation Loaded During MiVoice Business Startup
- Configuration Changes: MiVoice Business Restart Required for DSP Allocation Changes
DSP Resources
- VoIP Channels: E2T Channel Capacity Depends on Number of DSPX Modules and Compression Configuration
- Voice Mail: Supports Voice Mail DSP Resources
- Auto Attendant: Supports Auto Attendant DSP Resources
- Voice Compression: Supports G.729 Compression Resources
- Paging: Available DSP Configuration Also Determines Supported Phones per Page Group
1-DSPX Configuration
- Recommended System: Up to 80 Users
- Maximum Voice Mail / Auto Attendant Ports: 6
- G.729 Compressions: 0 in Published 1-DSP Configuration
- Maximum VoIP / E2T Channels: 20
- Maximum Phones per Page Group: 10
2-DSPX Configurations
- 80-User / No Compression Configuration: Up to 6 VM Ports and 40 VoIP Channels
- 80-User / G.729 Configuration: Up to 6 VM Ports, 1-24 G.729 Compressions and 24 VoIP Channels
- 150-User Configuration: Up to 16 VM Ports and 30 VoIP Channels with No G.729 Compression
- Maximum Phones per Page Group: Up to 20 Depending on Selected Configuration
3-DSPX Configurations
- Recommended System: Up to 150 Users
- Maximum Voice Mail / Auto Attendant Ports: 16
- No-Compression Configuration: Up to 50 VoIP Channels
- G.729 Configuration: 1-30 Compressions with Up to 30 VoIP Channels
- Maximum Phones per Page Group: Up to 25 Depending on Selected Configuration
Compatible SMB Controller Hardware
- SMB Controller 8/38G: Mitel 50008381
- 4-Port FXS Expansion Card: Mitel 20350436
- 2-Port FXO Trunk Card: Mitel 50008254
- 4-Port FXO Trunk Card: Mitel 50008255
Installation
- Installation Location: Dedicated DSP Slot on SMB Controller Mainboard
- Multiple Modules: DSPX Modules Can Be Stacked
- Maximum Stack: 3 DSP Modules
- Mounting: Uses Supplied Standoff and Fastening Screw Arrangement
- Hot-Swappable: No
- Controller Power: Power Down and Disconnect Power Before Installation or Removal
- Grounding: Chassis Must Be Properly Grounded
- ESD Precautions: Required During Installation and Service
Package Includes
- Mitel 20351208 System Module 2 DSPX
- DSP Module Mounting Standoff
Compatibility & Buying Information
Exact Part Number: This page is for Mitel part number 20351208, the System Module 2 DSPX resource module for MiVoice Business on the SMB Controller.
SMB Controller DSP: This module is designed for the Mitel SMB Controller. It should not be confused with Mitel 50008234, which is the separate DSP card used by the EX Controller platform.
At Least One Required: Mitel's current MiVoice Business SMB Controller documentation states that at least one 20351208 DSPX resource module is required in addition to the controller's onboard DSP resources.
Up to Three DSPX Modules: The SMB Controller supports a maximum stack of three DSP expansion modules. The modules install in the dedicated DSP position on the mainboard rather than occupying one of the controller's four optional interface-card sockets.
DSP Count Affects Capacity: The number of supported VoIP channels, voicemail / auto-attendant ports, G.729 compression resources, and paging capacity depends on the number of installed DSPX modules and the selected DSP allocation profile.
One DSPX Configuration: Mitel's published 80-user configuration with one expansion DSP supports up to six voicemail ports and 20 VoIP channels when G.729 compression is not configured.
Two DSPX Modules: Two modules can support up to 40 VoIP channels in an 80-user configuration without compression, up to 24 VoIP channels with 1-24 G.729 compressions, or a 150-user configuration with up to 16 voicemail ports and 30 VoIP channels without compression.
Three DSPX Modules: Three modules support Mitel's higher-capacity 150-user configurations, including up to 16 voicemail ports and 50 VoIP channels without G.729 compression, or up to 30 G.729 compressions and 30 VoIP channels in the published compressed configuration.
Not a User License: Adding DSPX hardware increases available media-processing resources but does not itself add MiVoice Business user licenses or enable licensed applications.
Not an Interface Card: The DSPX module does not provide FXS, FXO, Ethernet, or other external ports. The SMB Controller's analog interfaces are provided by its embedded hardware and optional 20350436 FXS, 50008254 2FXO, or 50008255 4FXO interface cards.
Restart Required: DSP resources are allocated during MiVoice Business startup. Changes to DSP allocation require the MiVoice Business application to restart before the new resource configuration takes effect.
Installation Safety: Mitel requires the SMB Controller to be powered down and unplugged before DSP or interface hardware is installed or removed. Proper chassis grounding and ESD precautions are required.
Best Fit: Mitel 20351208 is required for MiVoice Business SMB Controller installations and should be selected in the quantity needed to provide the required VoIP channel, voicemail, auto-attendant, compression, and paging resources for the engineered system configuration.