V.32 / V.32bis Soft ModemV.32bis / V.32 modem software is implemented for real-time execution with support for multichannel applications. The software libraries are modular and can be executed as a single task under a variety of operating systems or standalone with its own microkernel. Contact us to discuss your modem application requirements.

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VOCAL’s V.32bis / V.32 modem software is optimized for performance on leading DSP architectures and processors from TI, Intel, ADI, AMD and other vendors. Our V.32 modem software  may be licensed standalone, as a library or complete design. Custom solutions are also available.

Virtual Modem over IP

VOCAL’s SIP Software modem (MoIP or V.MoIP) solution provides developers a range of solutions to connect legacy dial up modems to modem infrastructure. Unlike other virtual modem designs, the SIP software modem can communicate with a physical modem at the far end using a VoIP service over an IP network.



V.32 and V.32bis Software Features

V.32 / V.32bis Modem

ITU-T V.32 defines the modulation methods and protocol operating sequences for a modem used on Switched Telephone Network 4-wire and on 2-wire  circuits. Both full duplex and half-duplex modes are supported with bidirectional data transfer at either 9.6 kbps or 4.8 kbps and a symbol rate of 2,400 baud. ITU-T V.32bis specifies a modem allowing  bidirectional data transfer at up to 14.4 kbps.

The line interface for the V.32 / V.32bis modem software may be an analog front end (codec and DAA) or a digital interface such as T1/E1, Switched 56, and ISDN. The upper end of this software can provide a PPP, HDLC, V.14, or a direct binary framing layer. Higher data protocol layers, V.42 (including MNP 2-4), V.44, V.42bis and MNP 5, are options as well.

The V.32bis and V.32 modulation family  can be combined with other data modulations including V.92, V.90, V.34, and V.22bis / V.22 / V.23 / V.21. Automatic modulation detection (Automode) procedures include those of PN-2330, V.8 and V.8bis. V.32 and V.32bis data modulation software is fully compatible with VOCAL’s facsimile, telephony, speech coder and multimedia systems.




VOCAL’s optimized software is available for the following platforms. Please contact us for specific V.32/V,32bis supported platforms.

ProcessorsOperating Systems
  • Texas Instruments – C6xx (TMS320C62x, TMS320C64x, TMS320C645x, TMS320C66x, TMS320C67x), DaVinci, OMAP, C5xx (TMS320C54x, TMS320C55x)
  • Analog Devices – Blackfin, ADSP-21xx, TigerSHARC, SHARC
  • PowerPC, PowerQUICC
  • MIPS – MIPS32, MIPS64, MIPS4Kc
  • ARM – ARM7, ARM9, ARM9E, ARM10E, ARM11, StrongARM, ARM Cortex-A8/A9/A15, Cortex-M3/M4
  • Intel / AMD – x86, x64 (both 32 and 64 bit modes)
  • Linux, uClinux, BSD, Unix
  • Microsoft Windows ACM / RTC / CE / Mobile
  • Apple iOS / iPhone / iPad & MacOS
  • eCOS / eCOSPro
  • Google Android
  • Green Hills Integrity
  • Micrium μCOS
  • Symbian
  • Wind River VxWorks


V.32 / V.32bis Datasheet