Media And Signaling Protocols; Telephony Features - HP iPAQ 500 Series Application Note

 Audio Quality
 Hardware and Firmware
 WLAN Infrastructure
 IP-PBX and SIP Server Support
 Accessory Support
While Internet voice services delivered by Internet Telephony Service Providers (ITSPs)
may also be based on SIP, HP has done no testing or validation of interoperability with
these services at this time.
2

Media and Signaling Protocols

This category is related to the industry protocols that exist today for carrying control
messages and media messages.
Supported:
 SIP – Session Initiation Protocol for Signaling [RFC 3261]
 G.711 – Audio codec for compression/decompression of voice. Both A-law and
u-law variants are included.
Not Supported:
 H.323 – signaling protocol used in some IP-PBXs
 SCCP – Cisco's proprietary call control protocol for Unified CallManager.
 G.729 – Compressed audio codec more suitable for voice over WLAN compared
to G.711
 Secure RTP [SRTP] – secure version of the RTP protocol [RFC 3711]
A full list of the standards supported and not supported is included in Appendix A of this
document.

3 Telephony Features

This category is related to the standard telephony features available in a VoIP
implementation.