Feature Phone Software Application Product Brief

The feature phone application is a fully functional telephone based on the DSP5685x family that provides a highly flexible framework for screenphone and telco service products. This flexibility permits device manufacturers to quickly add a custom user interface and value-added convenience features, such as number and call log directories, voice announce for caller ID, and digital answering/paging functions. The feature phone application can be expanded to support multi-line applications with multi-line conferencing. Feature phone compatibility with telephone networks is worldwide for call origination, call termination and speakerphone operation. Feature phone CLASS features are compatible with GR-30-CORE compliant networks (North America). Figure 1 illustrates the system diagram of the feature phone.

• Fully functional DSP-based telephone with speakerphone and CLASS feature support
• High quality, full duplex speakerphone with performance optimization tools
• Support for on-hook GR-30-CORE services:
   — Calling Number and Name Delivery
   — Dialable Directory Number
   — Visual Message Waiting Indicator
   — Call Qualifier
• Support for off-hook GR-30-CORE services:
   — Calling Identity Delivery on Call Waiting
   — Calling Waiting Deluxe
• Adaptive Line and Acoustic Echo Cancellation
• Multi-line and VoIP conference bridge ready
• Telcordia SR-3004 and SR-TSV-002476 compliant
• Supported by Performance ExpertTM (PE)
• An adaptive line echo canceller with a preset tail length of 16ms that is adjustable in 8ms intervals up to 64ms
• An acoustic echo canceller with a preset tail length of 24ms that is adjustable in 8ms intervals up to 64ms
• EIA-470 DTMF dialer
• Extension-in-use detection control
• Tonal Ringing Generator
• Command/Control interface via AT commands or direct function calls