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VOCAL offers complete hardware design, firmware development, software and support. For more information regarding our products and services click here

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Echo Cancellation
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- Acoustic Echo Canceller
- G.165 Echo Canceller
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Noise Reduction
Voice Quality Enhancement
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Compressed Sensing
Blind Signal Separation
Beamforming
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Audio Examples
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Advanced Error Coding
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Data Modems
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Fax Modems
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- V.34 Fax
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Platforms
- TI
- Analog Devices
  - Blackfin
  - ADSP-21xx
  - TigerSHARC
  - SHARC
- PowerPC
- MIPS (MIPS32, MIPS64, MIPS4Kc)
  - Altera
  - Broadcom
  - IDT
  - Ikanos
  - LSI Logic
  - Motorola
- ARM (ARM7, ARM9, ARM9E, ARM10E, ARM11, Cortex Series, SecureCore, StrongARM)
  - Atmel
  - Broadcom
  - NVIDIA
  - NEC
  - Toshiba
  - Freescale
  - STMicroelectronics
- CEVA
  - Teak
  - TeakLite
  - Palm
  - Oak
- Microchip
- x86
  - AMD
  - Intel
- Smart Phones
- Ikanos
  - Fusiv 150/200
- ARC
  - ARCtangent-A5
- NXP Philips Trimedia
  - TM1000
  - TM1100
  - TM1300
- VeriSilicon (formerly LSI Logic) ZSP
Operating Systems
- Unix
- Linux
- uClinux
- Microsoft Windows
  - Desktop
  - ACM
  - RTC
  - CE
  - Mobile
- Symbian
- Mac OS
- BSD
- VxWorks
- Integrity
FPGA/PLD/ASIC Cores

Products
ATAs
Home PBX
Video PBX
RASoIP Systems
Soft Radio
Facsimile Lawful Interception
T.38 FoIP Lawful Interception
Speakerphone
Data Modems
Fax Modems
T.38 Fax Gateway
V.34 Fax Terminal
Remote Radio Monitoring Systems

SIP > Presence

SIP Presence and Instant Messaging

This explains SIP presence and instant messaging.

SIP Datasheet

RFC 3261 Standard