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NEC MH150/MH160 Mobile Handset Overview 2-5
NEC MH150/MH160 Mobile Handset Administration Guide - Revision 2
probability that all voice packets are transmitted efficiently and with
minimum or no delay. SVP code is fully compatible with the IEEE 802.11
standard.
The WLAN Voice Gateway is an Ethernet LAN device that works with the
AP to provide quality of service (QoS) on the wireless LAN. Voice
packets to and from the NEC MH150/160 Wireless Handsets are
intercepted by the WVG and encapsulated for prioritization as they are
routed to and from either the NEC UNIVERGE 2400 or 2000 PBX. See
the WLAN Voice Gateway Administration Guide for SIP document for
detailed information about this device.
Wi-Fi Standard QoS
NEC MH150 and MH160 Mobile Handsets support WMM, WMM Power
Save and WMM Admission Control - all QoS standards from the Wi-Fi
Alliance based on IEEE 802.11e. The AP must support and enable all
three of these QoS mechanisms in order for the handset to work
properly. If the handset is configured for this option and the AP does not
advertise all of these features, it will fail to operate. The combination of
these three standards provides enterprise-class QoS in terms of voice
quality, battery life and call capacity. This option does not require the
WLAN Voice Gateway.
CCXv4
The CCX program allows WLAN client devices operating on Cisco APs to
take advantage of Cisco-specific features. The NEC MH150 and MH160
Mobile Handsets mobile handset has been certified by Cisco as CCXv4
compliant. When the CCXv4 operating mode is selected on the handset,
it operates using the required set of Cisco-specific and industry standard
QoS mechanisms. This option does not require the WLAN Voice
Gateway.
Access points
Access Points (APs) provide the connection between the wired Ethernet
LAN and the wireless (802.11) LAN. Access points must be positioned in
all areas where handsets will be used. The number and placement of
APs will affect the coverage area and capacity of the wireless system.
Typically, the requirements for use of NEC MH150/160 Wireless
Handsets are similar to that of wireless data devices.
Access points may use SVP code in conjunction with an WLAN Voice
Gateway; Wi-Fi Standard QoS (including WMM, WMM-Power Save and
WMM-Admission Control) or in the case of Cisco APs, CCXv4. APs must
be properly configured to support the corresponding QoS and
security methods selected for the handset.