OverviewThis electronic microphone contains an integral ADC convertor and ATM line interface. When power is applied, a continuous stream of audio cells is generated.
Audio SpecificationsSample precision: 16 bit mono
Sample rate: 44.1 ksps
Cell rate: 3675 cells per second.
ATM Cell FormatHeader : GFC=0, VPI=0, VCI= 48, PT=0, CLP=0 Payload=12 Samples of 16 bit audio, each sample repeated to generate a stereo compatible stream from a mono source.
Application ExamplesHands-free phone
Door Entry Phone
Voice activated control
The Warren ProjectThe ATM Warren Microphone is an experimental hardware device being developed at the University of Cambridge Computer Laboratory as part of the Warren Project. The Warren project is funded by Virata and has the aim of developing a set of low-cost ATM devices, including an ATM switch.
Pin ConnectionsRJ45 modular jack:
1 TX +
2 TX -
4 DC 0 Volts
5 DC +7.5 to 15 Volts