227803 ⎘
Arrangements for interconnection not involving centralised switching involving a common line for all parties
Sub-classes:METHOD, SYSTEM, AND SERVER FOR REDUCING NOISE IN A WORKSPACE
#2Audio group identification for conferencing
#3Volume control over shared trunk lines in intercom systems
#4Multiple dwelling house interphone system
#5Multiple dwelling house interphone system
#6Volume control over shared trunk lines in intercom systems
#7Intercom system for multiple users
#8Intercom network, mobile terminal, and method
#9METHOD, SYSTEM, AND SERVER FOR REDUCING NOISE IN A WORKSPACE
#10Audio group identification for conferencing
#11NETWORK COMMUNICATION SYSTEM
#12Building controller and interphone system
#13Intercom system
#14Intercom system and data transfer method in said system
#15Interphone system and setting apparatus
#16Intercom system for multiple users
#17Intercom network, mobile terminal, and method
#18Talk station for intercom network
#19Intercom system
#20Terminal device, and intercom system provided with terminal device
#21Intercom system
#22Exchange, call facilitation method, and call facilitation program
#23Multiple dwelling house interphone system
#24Collective housing/building entrance device and entryphone system having that collective housing/building entrance device
#25Dynamically adapting pre-recorded announcements
#26IP phone server for a KSUless telephone system
#27Door answering system
#28System for and method of exchanging server data in packet unit
#29Method and apparatus for interfacing analog data devices to a cellular transceiver with analog modem capability