Wlan Infrastructure; Ip-Pbx And Sip Server Support - HP iPAQ 500 Series Application Note

6 WLAN Infrastructure

This category is related to the wireless local area network (WLAN) infrastructure to
which the handset connects to send and receive IP traffic. The key consideration from the
mobile handset perspective is typically AP-AP roaming. Given the real time requirements
of voice and the delays inherent in WLAN authentication (802.11i), the strongly
recommended answer is a VoIP-enabled pervasive enterprise WLAN infrastructure. Note
that HP Services has a well-developed practice for migrating customers' WLANs to this
model. The baseline requirement here is a controller-based AP deployment; not
standalone APs. Examples of these controller-based WLAN product offerings include:
• Cisco Aironet APs with Wireless LAN controller(s)
• HP ProCurve Radio Ports plus Wireless Edge Services xl module(s) in 5300xl
switch chassis
• Extreme Networks Altitude APs and Summit switches
• Aruba Networks APs and Mobility Controller(s)
• Meru Networks APs and Controller(s)
Testing is underway with Cisco Aironet APs and wWireless LAN controllers. Other
WLAN infrastructure testing and results may be available in the future.
For optimal performance, all 802.11b and 802.11g data rates should be enabled on the
APs. Limiting the data rates on the APs may prevent iPAQ 500 series devices from
connecting to the AP.

7 IP-PBX and SIP Server Support

This category is related to the SIP-based IP-PBX system or server with which the
handheld device must interact for VoIP services. HP testing is underway with enterprise
IP-PBX products from Cisco, Avaya, Alcatel, and Nortel. Detailed test criteria and results
will be added to this section as they become available.
Results of other additional testing with operator-class SIP servers (Broadsoft, Sylantro,
Huawei, Alcatel, etc.) will be included when they are made available to HP.