Host Signal Processing Modem (HSP ModemTM) Chip

288I ASICThe PCT288I is a high speed HSP Modem chip  implementing ITU-T V.34bis protocols using the latest in Host Signal Processing  technology.  Several patents are pending on the PC-TEL HSP Modem software and hardware architecture.  The PCT288I supports baseline data/fax/voice communication features without  the expensive DSP data pump, controller, UART and memory components found in conventional DSP modems.  Luxury features such as simultaneous voice and data (DSVD) and HSP Speakerphone can be supported through a full-duplex audio chip. In the absence of a full-duplex audio chip, you can use  the low-cost PC-TEL ASIC/Voice CODEC for DSVD/HSP Speakerphone.

The HSP Speakerphone feature allows speakerphone support with any  full-duplex audio CODEC. HSP Speakerphone is just a software upgrade.

The PCT288I has been designed to operate in a Windows environment ensuring product compatibility over the life of the product.  The PCT family of products are software upgradable for speed, features and enhancements thus eliminating the need to ever have to "swap out" product.

The HSP Modem reference design, evaluation units, users manual, schematics and Gerber files will be provided on request to qualified customers.
Features:
  • 33.6K Data/14.4K Fax/ADPCM Voice/HSP Speakerphone/Radish Voice View  (AVD)/V.80
  • Optional DSVD/HSP Speakerphone as a free software upgrade through a full-duplex audio chip or with external low-cost PC-TEL Vocoder/Voice CODEC
  • Supports Win 3.11, Win 95, OS/2 and NT 4.0 operating systems
  • Received Win 95 logo
  • PCMCIA or PnP (for 8-/16-bit ISA)  requires additional PCMCIA interface or PnP chip
  • PCT288I comes in 100-pin TQFP and PQFP packages
  • Auto selection of COM ports/ IRQs
  • Supports Ties AT command set
  • High throughput virtual (software) UART  allows DTE rate over 115,200 bps
  • Low power consumption (60mW operating for TQFP @ 5V) and auto power management
  • Excellent choice for low power and  board size sensitive PCMCIA and PDA applications

System Requirements:

  • Pentium class CPU (100 MHz)/ 8MB RAM/256K L2 cache with ISA bus expansion or PCMCIA slot
  • DOS 6.0 or higher
  • Windows 3. 11, Win 95, OS/2, NT 4.0 and relevant applications
  • Communications software package
  Technical Specifications

Data Modulation Standards

  • ITU-T V.34: 33,600, 31,200, 28,800, 26,400, 24,000, 21,600, 19,200, 16,800, 14,400, 12,000, 9,600, 7,200, 4,800, 2,400bps
  • ITU-T V.32bis: 14,400, 12,000, 9,600, 7,200,bps(TCM), 4,800bps(DPSK)
  • ITU-T V.32: 9,600 bps (TCM/QAM), 4,800 bps (DPSK)
  • ITU-T V.22bis: 2,400 bps (QAM) •ITU-T V.22: 1,200 bps (DSPK)
  • ITU-T V.21: 300 bps (FSK)
  • ITU-T V.23: 1,200/75 bps (FSK)
  • Bell 212A: 1200 bps (DSPK)
  • Bell 103: 300 bps (FSK)

Data Compression

  • ITU-T V.42bis
  • MNP Class 5

Error Correction

  • ITU-T V.42 LAPM MNP 2-4

Fax Modulation or Protocol Standards

  • ITU-T V. 17: 14,000, 12,000, 9,600, 7,200 bps (TCM)
  • ITU-T V.29: 9,600 bps (QAM), 7,200 bps (QAM)
  • ITU-T V.27ter: 4,800 bps(DSPK), 2,400 bps (DSPK)
  • ITU-T V.21 Channel 2: 300 bps (FSK)
  • Group 3
  • EIA Class I

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