227828 ⎘
Telephonic communication systems specially adapted for combination with other electrical systems; Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using time division multiplex techniques;
COMMUNICATION MODEM, ELECTRICAL PRODUCT, AND METHOD FOR CONTROLLING SAME
#2COMMUNICATION MODEM, ELECTRICAL PRODUCT, AND METHOD FOR CONTROLLING SAME
#3Methods and apparatus to protect and audit communication line status
#4Telephone communication system over a single telephone line
#5Modem signaling using a multitone prefix over a voice channel of a wireless communication system
#6Universal ISDN/POTS splitter
#7Content downloading over TDM with download pausing
#8Methods and apparatus to protect and audit communication line status
#9Telephone communication system over a single telephone line
#10Cross-link
#11Telephone communication system over a single telephone line
#12Telephone communication system over a single telephone line
#13Telephone communication system over a single telephone line
#14Telephone communication system over a single telephone line
#15Computer-based multifunctional personal communication system with caller ID
#16Time division multiple access over voice line
#17Digital subscriber line transmission method, apparatus and system
#18Digital subscriber line transmission method, apparatus and system
#19Telephone communication system over a single telephone line
#20Telephone communication system over a single telephone line
#21Systems and methods for real-time transmission of digital data using a plurality of channels
#22Systems and methods for real-time transmission of digital data using a plurality of channels
#23Systems and methods for real-time transmission of digital data using a plurality of channels