Company Contact: Jim Bridges (610) 776-6669
75-MFLOPS S-Bus Telephony Board Features T1/E1 Interface and Four CD-Quality I/O Channels
Allentown, PA. September 1, 1996. Communication Automation & Control, Inc., announces the SB32C, an S-Bus telephony board that is available with either a T1 or E1 interface. Equipped with two Lucent Technologies DSP32C digital signal processors, the board also provides four CD-quality audio input/out channels and up to one Mbyte of zero-wait-state SRAM. The SB32C's powerful signal processing capabilities, versatile WAN interfaces, and high-fidelity audio I/O capabilities make it ideal for a broad range of computer telephony applications, including speech compression and recognition, text-to-speech, and secure speech.
The SB32C interfaces directly with T1 and E1 lines and can transmit and receive in full duplex mode. Control for the framer chip is mapped into the DSP's memory space. T1 and E1 data are transmitted via the DSP's serial port. Maximum transmission distance for the T1 interface is 6000 feet. Maximum distance for E1 interface is 1500 meters.
The SB32C is available with either one or two DSP32C processors. The single-processor version features a peak performance of 37 MFLOPS, provides one stereo Codec and comes with 512 kbytes of private SRAM. The dual-processor version features a peak performance of 74 MFLOPS, provides two stereo codecs, and comes with one Mbyte of zero-wait-state private SRAM (512 kbytes per DSP). The two DSPs communicate via a FIFO that is mapped into each DSP's memory space.
The SB32C's audio input and output channels are based on Crystal Semiconductor's CS4216 16- bit Codec. The Codec's sigma-delta A/D input portion features 64x oversampling and linear phase, digital anti-aliasing filters. The output sigma-delta modulator features 8x interpolation filters with 16-bit resolution. The Codec's sampling rate (7.34 to 48 kHz), input gain (0 to 22.5 dB), and output attenuation (0 to -46.5 dB) are software programmable, either by the host, or under DSP control. Each Codec is connected to one DSP's serial port. However, the Codecs can also be programmed to operate in a Y configuration. An on-board audio loopback can be programmed for diagnostics.
The SB32C occupies a single S-Bus slot. The 32-bit S-Bus interface supports master and slave transfer modes and can sustain DMA transfers to and from the DSP's memory at speeds of 3.5 Mbyte/sec. The SB32C also provides a separate 80-pin mezzanine connector that enables mezzanine cards to access the board's DSP serial port(s), interrupt line(s), Codec control lines, and DSP memory space.
Development support for the SB32C includes an AT&T C compiler, DSP32C assembler, drivers for the Solaris and the Sun OS operating systems, and a Unix library of C-callable functions for host-to-DSP communications. Also included is a window-based, source-level debugger known as D3BUG, which features pop-up/removable windows, controlled stepping functions, and global/local/watch variable display. D3BUG also lets programmers debug mixed source and assembly language instructions, as well as save and restore configurations.
One SB32C equipped with a single 50 MHz DSP32C and a T1 interface costs $2750 and is available immediately.
For further information, contact:
Communication
Automation and Control
1642 Union Blvd. Ste. 200
Allentown, PA 18103-1510
Tel: (610) 776-6669
Fax: (610) 770-1232
Email: sales@cacdsp.com