Data protocol software is part of our comprehensive and fully optimized modem software library. The higher protocol layers include V.42 (including MNP2-4), V.42bis, V.44 and MNP-5. PPP framing support is provided as a runtime option. The application interface supports an industry standard AT command set or may be used directly by a user application. The modulation layer provides a HDLC, V.14 or a direct binary framing layer. The line interface may be an analog front end (codec and DAA) or a digital interface such as T1/E1, xDSL, ATM, and ISDN.
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.
VOCAL’s data protocol software is optimized for performance on leading DSP and conventional processors from TI, Intel, ADI, AMD and other vendors. Our modem software may be licensed standalone or as a library. Custom designs are also available. Contact us to discuss your modem application requirements.
- V.42 LAPM Error Correction, Detection
- V.42bis Lempel-Ziv Data Compression
- V.44 LZJH Data Compression
- MNP 2-4 Error Correction
- MNP 5 Data Compression
- MNP 10 Protocol Extensions for Cellular
Data Protocol Software
VOCAL’s data protocol software is available for licensing as a standalone algorithm, a library, or part of a complete data modem solution. Custom solutions are available to meet specific application requirements.
VOCAL’s embedded software libraries include a complete range of ETSI / ITU / IEEE compliant algorithms, in addition to many other standard and proprietary algorithms. These libraries are modular and can be executed as a single task under a variety of operating systems or standalone with its own microkernel.
System Monitoring and Diagnostics
The system provides a wide variety of per-channel frame statistics that are updated continuously during operation. The statistics are accessible by the driving application and can be used for system monitoring and network bandwidth management. The statistics include:
- Modulation State
- SNR MSE Measure
- Tx/Rx Level dBm
- Telemetry Update
- Modulation Monitor Retrain/Renegotiate
- Carrier Family
- Disconnect Reason
- Initial and Current Tx/Rx Data Rate
- IETF Modem MIB support
- V.59 Modem diagnostic support
Additional diagnostic signaling can be selected by the driving application to aid in integration and system troubleshooting.