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IP Telephony > Gateways & Integrated Systems > DSP Series 2 Plus Card
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Introduction
The Digital Signal Processing Series 2 Plus Card provides fully integrated, high-performance media processing for the Converged Services Platforms (CSP). With the DSP Series 2 Plus Card added, the CSP Platforms integrate not only signaling along with TDM and IP interfaces, but also powerful media processing. Also, because it offers a comprehensive set of features for intensive media processing and media management, the DSP Series 2 Plus Card allows the CSP Platforms to be used for intensive media processing applications.
Features:
- Cancels file transmission when speech is detected
- Has a powerful, highly sensitive algorithm that provides recognition of answering machines, required for some applications
- Includes a DSP chip assigned to play a universal tone, which can be any tone type with the same encoding format; up to 512 tone receivers per DSP
- Includes positive tone detection, which sends only voice signals (no silence) to the speech server, freeing up expensive speech server ports
- NFS can be added for long-term storage of permanent fax records and for large voice mail message or recorded conference files
- Provides high-density echo-cancellation (G.168) with tail lengths up to 128 milliseconds
- Provides statistics for cache and function usage
- Records multiple file formats, including ADPCM and WAV; files can be played back by file offset and length and can be queued before play
- Supports a direct Real-time Transport Protocol (RTP) interface for speech servers
- Supports two-way call recording that uses no conference ports, as well as configurable beep tones and silence parameters
- Up to three hours of files can be stored on each DSP Series 2 Card, which can be used for temporary recordings and for files that are played back frequently