DSP-2 Card Features

Release 8.3.1 includes the following DSP Series 2 Card features.

• Echo Cancellation

• Positive Voice Detection/Answering Machine Detection

• Media Streaming Over RTP

Echo Cancellation

The DSP Series 2 card Echo Canceller removes echoes caused by signal leakage at hybrid telephone line interfaces. You may want to implement an Echo Canceller for tandem calls on trunks with echo, or to clean an incoming signal before connecting to a media resource, such as a Voice Recognition Unit (VRU) or Answering Machine Detection.

See Configuring Echo Cancel for more information.

Positive Voice Detection/Answering Machine Detection

You can configure the Excel platform to analyze incoming PCM data and detect voice or an answering machine. You can set PVD/AMD parameters for a DSP Series 2 card and for an individual channel. When a signal is detected, the host is notified with a Call Processing Event message.

See Implementing Positive Voice Detection/Answering Machine Detection for more information.

Media Streaming Over RTP

The DSP Series 2 card supports the direct termination of Real-time Transport Protocol (RTP) streams from any 3rd party media server or speech server, required for Automatic Speech Recognition (ASR), Text To Speech (TTS), or any applications using voice recognition.

See Media Streaming over RTP for more information.

Page Range in TIFF File

This feature allows the user of the DSP2’s Fax transmission capability to select a range of pages for transmission out of a single TIFF file. This allows you to incorporate selective page transmissions into your application for such reasons as removal of cover pages for fax store and forward applications or fax back services which send selective sections of repair manuals.

See Page Range in TIFF File for more information.

Full Duplex Channel Recording

This feature allows you to record both the inbound and outbound legs of a single channel. You can use this feature to record both channels in a connection within a single node or across the EXNET ring in a multi-node system.

See Full Duplex Channel Recording for more information.

Manual Input Volume Control

This feature enables a manual volume control on a parties inbound leg to a conference. The Automatic Gain Control for that party is automatically disabled, and the requested gain is added to the conferee’s speech prior to being added to the conference.

See Manual Input Volume Control for more information.

Support for .wav Formats

The DSP Series 2 card supports the following .wav file formats:

• G.711 A-law mono

• 16-bit linear, 11025 Khz mono *

• 8-bit linear, 11025 Khz mono

See Encoding Formats for more information.