Connection method of digital cordless telephone apparatus

Details Connection method of digital cordless telephone apparatus Connection method of digital cordless telephone apparatus

1995-12-07

1998-04-07

Olms, Douglas W.

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

370442, 370459, 455426, 455509, H04Q 738

Patent

active

057373256

ABSTRACT:
A connection method of a digital cordless telephone apparatus allows communication between a first calling side portable unit and a second called side portable unit of the plurality of portable units. The first portable unit transmits an access request signal for requesting a call to the second portable unit. A base unit receives an access request signal and determines whether or not there are any transmission slots and reception slots available for connecting the first portable unit to the second portable unit via the base unit. If there are the available transmission slots and reception slots, then the base unit uses usable slots to allow a call between the first portable unit and the second portable unit. If there are no available transmission slots and reception slots, then the base unit transmits a control signal including busy information. The first portable unit receives the control signal and transmits to the second portable unit a direct access request signal for requesting a call to the second portable unit. The second portable unit receives the direct access request signal, thereby communicating with the first portable unit.

REFERENCES:
patent: 4939769 (1990-07-01), Sakanishi
patent: 5287551 (1994-02-01), Gustafson, Jr. et al.
patent: 5495508 (1996-02-01), Kaewell
patent: 5515366 (1996-05-01), Chieu
patent: 5519763 (1996-05-01), Namekawa
patent: 5636243 (1997-06-01), Tanaka

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