ISDN remote switching unit for accommodating analog and digital
ISDN signal transmission performance monitoring
ISDN subscriber terminal control system
ISDN switching system having testing facilities
ISDN system having subscriber line multiplexer with means for es
ISDN system which processes disconnect message after call termin
ISDN terminal adapter using reduced memory for timing difference
ISDN terminal adapter with teleconference provision
ISDN Terminal equipment
ISDN terminal equipment control method
ISDN terminal equipment operating with circuit switching mode an
ISDN terminal system
ISDN terminal, ISDN terminal communication system, and method fo
ISDN testing device and method
ISDN traffic generator adapter
ISDN user-network interface system
ISDN, basic rate interface arranged for quad voice
ISDN-served cell-site stations with means for distributing calls
ISDN-to-ISDN communication via satellite microwave radio frequen
Isochronous clock reconstruction