Convergent Voice Module

I promised Sam I'd look this up a long time ago. I had some trouble with the phone lines, though, which made it impossible to use the modem. But here it is. I seem to have a preliminary version of the 'Voice Module' manual, although I did not get the module itself with the machine. The manual goes into a lot of detail: theory of operation, external interfaces, architecture... schematics... I'll quote from the overview: INTRODUCTION TO THE MODULE __________________________ GENERAL The Voice Processor Module, shown in Figure 1-1, provides a fully integrated voice and data interface between a workstation and the switched telephone netowrk or commonly used private automatic branche exchange (PABX) system (supporting Tip and Ring connection). When used with a digital PABX system, all signals and transmission between the Voice Processor Module and the PABX occur via analog techniques. The Voice Processor Module is an X-Bus module containing two printed-circuit boards. The first board contains a Bell 212A-compatible modem. The second board contains the following: * modular jacks for two telephone line interfaces (FCC, part 68, registered) * additional modular jack (FCC, part 68, registered) that allows connection to any standard voice unit (telephone set) * analog crosspoint switch allowing any device to connect to either line under software control * Dual-Tone Multifrequency (DTMF) touch-tone auto-dialer * DTMF touch-tone decoder that permits numeric data entry via remote voice unit touch pad * call progress tone detector * voice amplifier * Adaptive Pulse Code Modulation (ADPCM) CODEC (Coder/Decoder) for support of digitized voice communications at speeds far less than the normal 64Kbps * 8051 microprocessor to control all module activities (...excepts from following specifications...) Modem board is originate/answer, full-duplex. Supports 212A and Bell 103/113. DTMF generator generates all 16 DTMF digits, may be programmed to transmit various key sequences, and can generate single tones. CODEC and ADPCM technique allows recording/playback of digitized voice information at 6-kHz (24Kbps) or 8-kHz (32Kbps) rates. Software support is provided by CT-MAIL, CT-Net, and "Operator" software, which is specifically tailored for the Voice Module as follows: * Telephone directory management, which has the ability to add, delete, modify, and look up entries in a disk-based telephone directory, and automatically establish calls using the information in the directory. Menus provide assistance in accessing special functions used by PABXs. * Voice digitization, which allows the operator to use the CODEC to record and play back calls or messages. This capability enhances CT-MAIL, where it is used for voice annotation of written documents, as well as the inclusion of voice attatchments to textual mail. * Telephone answering, which allows an unattended system to automatically answer the telephone and perform a variety of user-selectable operations ranging from simple messatge playback/recording to input of numeric data from a telephone touch-tone pad. There you have it. All typos are my responsibility. ok r.