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SpectraLink Corporation
Installation, Configuration, and Administration
NetLink Telephony Gateway
Part Number: 72-0065-02-R.doc
Page 15
4.2
LAN Requirements
Network Infrastructure
The NetLink Telephony Gateway connects to your local area network (LAN). To
provide adequate bandwidth and limit collisions, an Ethernet switch is required. The
traffic between the NetLink Telephony Gateway and wireless LAN APs should be
isolated as much as possible to avoid additional latency. The NetLink Telephony
Gateway and APs must be on the same logical IP subnet. Inter-subnet roaming is
not permitted for wireless devices.
Each NetLink Telephony Gateway to be installed requires a 10 Mb/s switched
Ethernet connection.
The NetLink Telephony Gateway and wireless telephones rely on wireless LAN APs
to transmit and receive packets from wireless telephone devices. The APs must be
compatible with the IEEE 802.11 standard for wireless LANs, either frequency
hopping or direct sequence spread spectrum radios. To configure a wireless LAN to
support NetLink Telephony Gateways and wireless telephones refer to
Deploying
NetLink Wireless Telephones: Best Practices
.
IP Addressing
The NetLink Telephony Gateway, along with each of the handsets associated with it,
requires an IP address. The system administrator must determine what IP addresses
are to be used by the NetLink Telephony Gateway and APs. Handsets can be
configured to use DHCP or Static IP addressing. Record IP address assignments on
the
Wireless Device Planning Worksheet
s—one for each NetLink Telephony Gateway.
These worksheets may be started when the system is installed. The information
recorded on them is used in the configuration and continuing administration of the
system.
IP multicast addresses are used by the NetLink i640 Wireless Telephone.
This requires that multicasting be enabled on the subnet used for the
NetLink Wireless Telephones, SVP Server, and 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.