{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8521155","patent":{"patent_number":"US-8521155","title":"Presence-based call switching","assignee":null,"inventors":[],"filing_date":"2007-12-21T00:00:00.000Z","publication_date":"2013-08-27T00:00:00.000Z","cpc_codes":["H04L","H04L","H04L"],"num_claims":13,"abstract":"To facilitate establishment of connections between dual-mode mobile wireless devices within a local wireless data network, at a network gateway for the local wireless data network, receiving from a first dual-mode mobile wireless device following entry of the first dual-mode mobile wireless device to the local wireless data network a registration request, a first dual-mode mobile wireless device telephone directory number (DN), and a first dual-mode mobile wireless device session initiation protocol (SIP) uniform resource identifier (URI). A first device dynamic data network address is assigned to the first dual-mode mobile wireless device. The first device DN and the first device SIP URI are forwarded to a database for storage no that the first device SIP URI is associated with the first device DN in the database. The first dual-mode mobile wireless device is returned a network SIP URI for the wireless data network."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Presence-based call switching","description":"To facilitate establishment of connections between dual-mode mobile wireless devices within a local wireless data network, at a network gateway for the local wireless data network, receiving from a fi","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8521155","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-8521155","citation_suggestion":"Patentable. \"Presence-based call switching\" (US-8521155). https://patentable.app/patents/US-8521155","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8521155","json":"https://patentable.app/api/llm-context/US-8521155","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T01:36:33.427Z"}