PSB 21553 E

Voice Processing DSP Features
Voice coding supports G.711,G.723.1, G729A/B, and G.722 standards
Advanced voice capabilities with full duplex hands-free functions,including noise suppression and Acoustic and Handset Echo Suppression
Silence compression (transmit)
Voice Activity Detection (transmit)
Comfort noise generation (receive)
Speech Recognition
Tone Generation for ringing and DTMF
3-party conferencing with transcoding
Integrated Analog front end with 100 mW driver for external speaker
100 MHz OAK subsystem with 116 Kbytes RAM and 108 Kbytes ROM

CPU Features
Powerful 150 MHz MIPS32™ 4Kc™ RISC CPU
Hardware accelerator for encryption (DES/3DES/AES standards)
SDRAM and cache controller
Separate I-Cache and D-Cache integrated on chip
MMU with 16 entry TLB
5-channel DMA controller
Clock generation unit and power management

Ethernet MAC and PHY Features
Two 10/100BaseT Ethernet ports with integrated MAC and PHY
Wire speed Ethernet switch with embedded packet buffer and MAC address table
Fully IEEE 802.1Q and IEEE 802.1p compliant
IEEE 802.3x full and half-duplex flow-control compliant
Supports full 4kByte range of VLAN IDs
Class of Service determined by frame VLAN tag or TOS field
Configurable output scheduling mechanism for Quality of Service
Supports 16 VLAN multicast groups