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V.22bis/V.22/Bell 212/V.23/V.21/Bell 103 Software

VOCAL's embedded software libraries include a complete range of ETSI / ITU / IEEE compliant algorithms, in addition to many other standard and proprietary algorithms. Our software is optimized for execution on ANSI C and leading DSP architectures (TI, ADI, AMD, ARM, MIPS, CEVA, LSI Logic ZSP, etc.). These libraries are modular and can be executed as a single task under a variety of operating systems or standalone with its own microkernel.

The line interface 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.

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

Features

  • Fully compliant with ITU recommendations
  • Automatic V.22/Bell 212, V.21/ Bell 103 and V.23/Bell 202 determination upon answer
  • Programmable ITU or Bell protocol selection for origination
  • Modem MIB support (RFC 1696)
  • Local and remote loopback diagnostics (V.54 and V.22 RDL)
  • Modular software suite available with controller code
  • Optimized for high performance on leading edge DSP architectures
  • Multi-tasking environment compatible

Configurations

  • DAA interface using linear codec at 7.2 kHz, 8.0 kHz or 16.0 kHz sample rate
  • Direct interface to 8.0 kHz PCM data stream (A-law or u-law)
  • PPP (RFC 1662), HDLC, V.14, asynchronous FSK, and direct binary framing layers
  • North American and International Dialing/Telephony dialing functions available
  • Data protocol layer (V.42, MNP 2-4, V.44, V.42bis, and MNP 5) available
  • System can be combined with V.110 rate adaptation software
  • V.23/Bell 202 based Caller ID available
  • System can be combined with other modulations (V.92, V.90, V.34, V.32bis, et al) and automode procedures (PN-2330, V.8 and V.8bis)
  • Data/Facsimile/Voice Distinction upon startup is available. Complete facsimile systems, modulations (V.34fax, V.17, et al.) and protocols (T.30), and speech coders available.
  • Multiple modulations can be executed on a single DSP

Datasheet

ITU Recommendation V.21

ITU Recommendation V.22

ITU Recommendation V.22bis

ITU Recommendation V.23