Extension of a local area phone system to a wide area network
OwnerKim Quo-Taht Liu, Shriram Natarajan +2inventors
InventorsKim Quo-Taht Liu, Shriram Natarajan, Ragunath Devarasu, William R. Stensrud
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OwnerKim Quo-Taht Liu, Shriram Natarajan +2inventors
InventorsKim Quo-Taht Liu, Shriram Natarajan, Ragunath Devarasu, William R. Stensrud
Estimating the term…
A soft switch 134 providing wireless PBX voice services to a local area network (WLAN) is used to extend PBX functionality to the cellular domain. A dual mode remote unit is capable of receiving signals both in the cellular system as well as the WLAN. The cellular system is comprised of a data-bearing path and a voice-bearing path. When the dual mode remote unit is within the WLAN, it communicates both voice over IP (VoIP) signaling as well as session initiation protocol (SIP) control signaling over the WLAN. When the remote unit is outside the WLAN, it communicates voice signaling over the voice-bearing path of the cellular network using a standard cellular voice channel. In parallel, it uses the data-bearing path of the cellular network to transmit SIP control signaling.
An apparatus in a cellular communication system comprising:
A method of initiating a call in a cellular communication system from a wireless phone to a remote party comprising:
An article of manufacture comprising:
The article of manufacture 14, wherein the plurality of instructions are further configured to enable the apparatus to:
An apparatus, comprising:
Dependencies are inferred from the claim text.