Multicast; Placement Guidelines For The Wlan Ip Telephony Manager 2245 - Avaya Communication Server 1000 Installation And Commissioning Manual

Planning

Multicast

IP multicast addresses are used by the WLAN Handset 2211 and the Avaya 6120 WLAN
Handset Push-to-talk (PTT) feature. The use of IP multicast addresses requires that
multicasting be enabled on the Layer 2 switch used by the defined group (WLAN IP Telephony
Manager 2245 units master and slaves and wireless handsets).
Routers are typically configured with filters to prevent multicast traffic from flowing outside of
specific domains. The wireless LAN can be placed on a separate VLAN or subnet to reduce
the effects of broadcast and multicast traffic from devices in other network segments.
Placement guidelines for the WLAN IP Telephony Manager
2245
To reduce the impact that jitter, delay and packet loss has on voice quality, proper placement
of the WLAN IP Telephony Manager 2245 is critical. See
packet loss
functions to help achieve exceptional voice quality over WLAN:
• Timing
• Quality of Service (QoS)
• Connection Admission Control
Before adding the WLAN IP Telephony Manager 2245 to the network:
• Ensure that the APs used in the network are Voice Interoperability for Enterprise Wireless
(VIEW) certified. For more information, go to
partners/view_certification.jsp.
• Ensure that the handsets are running Phase II software (97.070 or greater).
74 Avaya WLAN IP Telephony Installation and Commissioning
on page 75. The WLAN IP Telephony Manager 2245 provides three critical
Figure 11: Maximum delay, jitter and
http://www.spectralink.com/consumer/
November 2010