Enhancements in Indiana Wireless Direct Network SIP Location Conveyance Development

Dec 11, 2025

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This workshop discusses the latest advancements in SIP location conveyance within the Indiana Wireless Direct Network. Utilizing Karl Heinz Wolf's extended “ZAP” client, we conducted successful test calls, overcoming minor SIP compatibility issues. Current development includes parsing PDIF-LO from SIP methods and integrating it into the XML-based ALI system. We are currently in the alpha stage and are working on hooking PDIF-LO into the existing IN911 ALI system. For demonstrations or inquiries, please contact Byron Smith at bsmith@indigital.net or call +1 260 469 2010.

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Enhancements in Indiana Wireless Direct Network SIP Location Conveyance Development

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SDO Emergency Services Workshop SIP location conveyance development in the Indiana Wireless Direct Network Byron Smith
SIP location conveyance status • We use Karl Heinz Wolf’s extended • “ZAP” client to generate test calls • A few minor SIP compatibility problems were promptly resolved • We did ZAP to ZAP with location conveyance through the IN911 SIP system, without issues.
Current Development efforts • Parse PDIF-LO out of SIP methods, and post in .XML file for ALI system. (Working in “alpha” stage) • Hook PDIF-LO into exiting IN911 ALI system. IN911 ALI system is XML-based. (Remains to be completed) • Demonstration