Title:
RADIOTELEPHONY COMMUNICATION METHOD AND SYSTEM
Document Type and Number:
Japanese Patent JPS54139305
Kind Code:
A
Abstract:
A telephone system for providing communications between mobile radiotelephones, portable radiotelephones and land-line telephones, includes a land-line telephone system including a land-line switching network (20) for providing communication paths for land-line telephones, and a mobile radiotelephone system (30, 40, 50 and 60) for providing communication paths for mobile and portable radiotelephones. The mobile radiotelephone system includes a digital switching network (40), base stations (60), and PCM analog-to-digital (A/ D) and digital-toanalog (D/A) converters (30) interposed between the base stations (60) and the digital switching network (40) and between the land-line switching network (20) and the digital switching network (40). Analog ports are interfaced by the PCM A/D and D/A converters (30) to incoming and outgoing serial bit streams coded according to pulse-code-modulation (PCM) techniques standardized for telecommunications systems by the International Telegraph and Telephone Consultative Committee (CCITT). The digital switching network (40) receives the incoming serial PCM bit streams and provides the outgoing serial PCM bit streams so that telephone calls are automatically routed between the calling and called parties in the telephone system. Supervisory signalling is detected from the incoming serial PCM bit streams and processed by a signal processing unit (50) to determine an ordering of time slots for the PCM channels for controlling the interchange of PCM channels from the incoming serial PCM bit streams to the outgoing PCM channels corresponding to the incoming supervisory signalling from incoming PCM channels is adapted to a pre-established format recognized by the corresponding outgoing PCM channels and multiplexed into the respective outgoing serial PCM bit streams.
Inventors:
RICHIYAADO AABINGU RITORU
BARII DONARUDO RABIN
SUTEFUAN RII SUPIA
BARII DONARUDO RABIN
SUTEFUAN RII SUPIA
Application Number:
JP1382579A
Publication Date:
October 29, 1979
Filing Date:
February 08, 1979
Export Citation:
Assignee:
MOTOROLA INC
International Classes:
H04M3/00; H04B7/26; H04Q11/04; H04W84/04; (IPC1-7): H04B7/26
Domestic Patent References:
| JPS5190207A | 1976-08-07 | |||
| JP45013844A |