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SpectraLink Corporation Setup and Administration–NetLink e340 & i640 Wireless Telephone
NetLink Telephony Gateway and SpectraLink Radio Protocol
PN: 72-1065-09-E.doc Page 8
2. NetLink Wireless Telephone Overview
The NetLink e340 and i640 Wireless Telephones are mobile handsets for workplace
telephone systems. The Wireless Telephone operates over an 802.11b (802.11 for FH)
wireless Ethernet LAN providing users a wireless voice over IP (VoIP) extension. By
seamlessly integrating with the NetLink Telephony Gateway and the site PBX, Wireless
Telephone users are provided with high-quality mobile voice communications throughout
the workplace. The Wireless Telephone gives users the freedom to roam throughout the
workplace while providing all the features and functionality of a desk phone.
The Wireless Telephones reside on the wireless LAN with other wireless devices using
Direct Sequence (DS) or Frequency Hopping (FH) Spread Spectrum radio technology.
The handset radio transmits and receives packets at up to 11Mb/s.
When the system employs four or fewer NetLink Telephony Gateways and no NetLink
SVP Server, the NetLink Telephony Gateways provide SpectraLink Voice Priority
(SVP). SVP is required for handling voice packets on an 802.11 WLAN. In this
configuration the NetLink Wireless Telephones are limited to a maximum of 2Mb/s. If
the 11Mb/s transmission rate is desired, a NetLink SVP Server must be added to the
system.
The NetLink Wireless Telephone supports Wired Equivalent Privacy (WEP) as defined
by the 802.11 specification. SpectraLink offers the product with both 40-bit and 128-bit
encryption. WEP increases the security of the wireless LAN to a level similar to a wired
Ethernet LAN.
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.
All SpectraLink products use our LinkPlus digital integration technology to integrate
with various digital switch platforms. Using LinkPlus technology, Wireless Telephones
emulate digital telephone sets to deliver advanced capabilities such as multiple line
appearances and LCD display features. See the LinkPlus Interface Guide for your PBX
for information about mapping the PBX features to the Wireless Telephone.