Pabx common channel relay system

Pabx register for acquiring hundreds information from a two...

Pabx transmission and impulsing arrangement

Pabx with voice mail device

Packaging for telephone multiplex equipment

Packet and circuit switched communications network

Packet communication method, packet communication device and...

Packet communication system

Packet concentrator and packet switching system

Packet cross connect switch system including improved...

Packet data communication device and method in mobile...

Packet data communication system with ring type transmission...

Packet data flow control for an isdn d-channel

Packet data in an analog cellular radiotelephone system

Packet data transmission using dynamic channel assignment

Packet error rate measurements by distributed controllers

Packet exchange network and method of controlling discard of...

Packet load monitoring by trunk controllers

Packet multiplexer with automatic communication path...

Packet network with communication resource allocation and...