Multichannel physiological monitor plus simultaneous full-duplex speech channel using a dial-up telephone line.
Because of bandwidth limitations, the Public Switched Telephone Network (PSTN) cannot normally accommodate simultaneous multichannel physiological signaling with speech. This communication describes work carried out to build a physiological monitoring system which can transmit up to six low-frequency data channels in the presence of a full-duplex speech channel using one telephone line.
Rezazadeh
M
M
Northern Ireland Bioengineering Center, University of Ulster, Newtownabbey, Co. Antrim.
Evans
N E
NE
D004562:Electrocardiography / Q000295:instrumentation; D004867:Equipment Design; D003629:Modems; D008991:Monitoring, Physiologic / Q000295:instrumentation*; D013686:Telemetry / Q000295:instrumentation; D013689:Telephone