Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network
Patent
1995-04-05
1997-03-11
Cumming, William
Telephonic communications
Having light wave or ultrasonic link for speech or paging...
Including fiber optic link within telephone network
370331, H04Q 738
Patent
active
056109741
ABSTRACT:
A roaming arrangement enables roaming between different types of networks in a telecommunication system that includes a first standardized type of mobile network, a so-called home network, and a second standardized type of mobile network, a so-called guest network. A subscriber has an identity that is common for both the home network and the guest network. The roaming arrangement includes a signal handling arrangement, at least one home interface towards the home network, and at least one guest interface towards the guest net. A first signalling format between the arrangement and the home network is of the same type as a corresponding format in the home network. Also, a second signalling format between the arrangement and the guest network is of the same type as a corresponding format in the guest network.
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Synacon Technology DCS-1900/IS-41 RoamFree.TM. Gateway System Requirements, Version 0.3, May 23, 1995.
Cumming William
Telefonaktiebolaget LM Ericsson
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