Is IP multicast required for the SpectraLink wireless telephones?
IP multicast addresses are used by the SpectraLink wireless telephones for most interfaces and for the SpectraLink i640 PTT feature. This requires that multicasting be enabled on the subnet used for the SpectraLink wireless telephones, SpectraLink SVP Server, and SpectraLink Telephony Gateways. 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.
