Spectralink 84-Series Wireless Telephones Deployment Guide with CMS
721-0048-000_B.docx
February 2018
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Ethernet switch
One or more Ethernet switches interconnect multiple network devices. Enterprise Ethernet
switches provide the highest performance networks, which can handle combined voice and data
traffic, and are required when using the Spectralink 84-Series Wireless Telephones.
Ensure the WLAN and network infrastructure provides connectivity from the wireless telephone
to all its required network resources (SIP Server, etc.) once the 84-Series handset connects to
the network and obtains an IP address.
Spectralink 84-Series Wireless Telephones cannot roam with uninterrupted service between
subnets unless specific LAN components are present. Certain AP/Ethernet switch combinations
establish a Layer-3 tunnel across subnets that enable the handsets to roam. Without this
capability, any call in progress will be dropped when the user moves out of range and the
handset must be power cycled in order to resume functionality in the new subnet area. Consult
your AP vendor document for more information about Layer 3 tunneling.
If you do not have Layer 3 capability, ensure that the SSID your phones associate with uses the
same subnet on all APs for proper operation.. The handset can change subnets if DHCP is
enabled and the handset is powered off then back on when within range of APs on the new
subnet. Note that the wireless telephones cannot “roam” across subnets, since they cannot
change IP addresses while operational.
