Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1996-09-25
1999-11-23
Cumming, William
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
340905, H04Q 722
Patent
active
059916311
ABSTRACT:
A slave switch having a number of connections for traffic with switch-external users, and a number of extensions intended for connection with switch-internal users, is disclosed. The slave switch is characterized in that it is constructed to initiate originating calls only, and in that the switch includes by-pass signalling means. A method of communication between the slave switch and a master switch is also disclosed.
REFERENCES:
patent: 4812843 (1989-03-01), Champion, III et al.
patent: 5090051 (1992-02-01), Muppidi et al.
patent: 5185741 (1993-02-01), Iguchi et al.
patent: 5295179 (1994-03-01), Asahara et al.
patent: 5307399 (1994-04-01), Dai et al.
patent: 5394140 (1995-02-01), Wong et al.
patent: 5442683 (1995-08-01), Hoogeveen
patent: 5619551 (1997-04-01), Yahagi
Cumming William
Telefonaktiebolaget LM Ericsson
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