Overview - HP iPAQ 500 Series Application Note

1 Overview

Mobile IP telephony services can be separated into three broad categories, each with its
own specific target markets and technologies used. These categories are illustrated below:
Tested use cases for the built-in VoIP client on the HP iPAQ 500 series smartphone cover
the enterprise VoIP segment exclusively and expect the enterprise has IT staff that
manage their own IP-PBX systems and provision devices for enterprise users. Mobile
enterprise VoIP services should be accessible anywhere the VoIP-enabled enterprise
wireless local area network (WLAN) provides coverage, typically within company
buildings and possibly around corporate campuses. Using the built-in VoIP client for
mobile access to the company's IP-PBX from remote locations (homes, hotels, Internet
hotspots, etc.) is not a supported capability.
HP uses the native Microsoft SIP (Session Initiation Protocol) client in Windows Mobile
6 to access VoIP services, and this SIP client's capabilities and limitations have been
further split into the following categories for the purposes of this document:
 Media and Signaling Protocols
 Telephony Features