V.92 is an ITU dial-up modem standard that provides an increase in upload speeds(PCM upstream or PCMU), quicker connect times (Quick Connect or QC), and a Modem-On-Hold (MOH) feature that allows the modem to work in conjunction with call waiting provided by the phone company.
Each of these features can be used independently. Depending upon the V92 modem configuration selected, 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 PPP, V.14, HDLC or direct binary framing layers. Higher data protocol layers, such as, V.42 (including MNP 2-4), V.44, V.42bis and MNP5 are options as well.This modulation family can be combined with other data modulations (V.90, V.34, V.32bis/V.32, and V.22bis/ V.22/V.23/V.21). V.8/V.8bis startup procedures can be used. All data modulation software is fully compatible with VOCAL’s facsimile, telephony, speech coder and multimedia systems.
V92 modem (Determined November 2000) refers to procedures between a “digital modem” and an “analog modem”. The analog modem, which may be connected to the PSTN through either an analog or digital interface, transmits and receives G.711 PCM signals. The digital modem, which is connected to the PSTN through a digital interface, transmits and receives G.711 PCM signals. V.90 (Determined February 1998) refers to procedures between a “digital modem” and an “analog modem”. The analog modem, which may be connected to the PSTN through either an analog or digital interface, transmits V.34 signals and receives G.711 PCM signals. The digital modem, which is connected to the PSTN through a digital interface, transmits G.711 PCM signals and receives V.34 signals.
VOCAL's V92 modem software is compliant with V92 modem. V92 modem upgrades are provided as the as recommendation is improved. VOCAL's V.92 modem software supports MIB (RFC 1696). V92 modem VOCAL modem software specifies 22 modulation rates in range of 28000 bps to 56000 bps, in increments of 1 1/3 kbps. (Administration requirements may restrict maximum rates/power allowed). V92 modem VOCAL modem software is Multi-tasking environment compatible. These V92 modem system configurations are relevant: V.90 plus PCM upstream, V.90 plus Quick Connect, V.90 plus Modem-on-Hold, V.90 plus PCM upstream and Modem-on-Hold, V.90 plus PCM and Quick Connect, V.90 plus Modem-on-Hold plus Quick connect, V.90 plus Modem-on-Hold plus Quick connect plus PCM upstream.
Figure 1 shows a block diagram of the V92 modem Server and Client.
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.