SpectraLink Corporation
Installation, Configuration, and Administration
NetLink Telephony Gateway
Part Number: 72-0065-02-R.doc
Page 7
2.
NetLink Overview
The NetLink Telephony Gateway provides telephone functionality to NetLink
Wireless Telephones and NetLink Docking Stations over a wireless local area
network (LAN). The installation process connects the Gateway to an existing host
telephone system and LAN. The configuration process covers downloading current
software, setting network parameters, setting Gateway parameters, assigning wireless
telephones to the lines controlled by the Gateway, and establishing feature
programming. Maintenance covers adding and deleting handsets, upgrading software,
etc. The troubleshooting section provides directions for analyzing system
functioning via the
System Status
menu.
2.1
System Architecture
The NetLink Telephony Gateway and NetLink Wireless Telephone are SpectraLink's
wireless LAN-based telephony products. NetLink products operate in the 2.400-
2.483 GHz unlicensed band, using either the frequency hopping (FH) or direct
sequence (DS) spread spectrum technology which is compatible with the IEEE
802.11 wireless LAN standard. There are two models of the NetLink Telephony
Gateway: an 8-line model and a 16-line model.
Note that the 16-port Gateway and the 8-port Gateway are installed and configured
identically. Both support eight simultaneous calls. However, the 8-port Gateway will
be limited to eight line interfaces.
NetLink Wireless Telephones operate as clients on the wireless LAN, alongside
other mobile 802.11 devices. Wireless LAN fixed radios, called access points (APs),
receive IP voice packets from handsets and forward them to the NetLink Telephony
Gateway over the Ethernet LAN. The Telephony Gateway connects to the host
telephone switch using digital or analog line interfaces. Using SpectraLink’s exclusive
LinkPlus digital interface technology, handsets are able to emulate proprietary digital
telephone sets, making advanced switch features such as multiple line appearances
and display features available to mobile users.
Up to forty NetLink Telephony Gateways may be connected to the LAN for a
maximum capacity of 640 NetLink Wireless Telephones. When five or more
NetLink Telephony Gateways are installed, the NetLink SVP Server must also be
installed to manage the increased load.
2.2
SpectraLink Voice Priority (SVP) and Quality of Service
SVP is the SpectraLink quality of service (QoS) mechanism that is implemented in
the handset and an access point (AP) to enhance voice quality over the wireless
network. SVP gives preference to voice packets over data packets on the wireless
medium, increasing the probability that all voice packets are transmitted efficiently
and with minimum or no delay. SVP is fully compatible with the IEEE 802.11
standards.
The NetLink SVP Server is an Ethernet LAN device that works with the APs to
provide QoS on the wireless LAN. Voice packets to and from the handsets are
intercepted by the NetLink SVP Server and encapsulated for prioritization as they
are routed to and from the NetLink Telephony Gateway. See
NetLink SVP Server: