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SpectraLink Corporation Installation, Configuration, and Administration
NetLink SVP Server (within IP environments)
PN: 72-0178-01-F.doc Page 6
2. NetLink SVP Server Overview
The NetLink SVP Server is an Ethernet LAN device that works with access points
(APs) to provide QoS on the wireless LAN. Voice packets to and from the NetLink
Wireless Telephones are intercepted by the NetLink SVP Server and encapsulated
for prioritization as they are routed to and from an IP telephony server.
2.1 SpectraLink Voice Priority (SVP) and Quality of Service
SpectraLink Voice Priority (SVP) is the SpectraLink quality of service (QoS)
mechanism that is implemented in the wireless telephone and 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 delay. SVP is fully compatible with IEEE
802.11b standards.
NetLink Wireless Telephones support basic WMM (Wi-Fi Multimedia) if also
supported by the AP as part of the 802.11e protocol. If the AP supports WMM, the
wireless telephone automatically discovers and uses it. WMM does not replace the
NetLink SVP Server.
2.2 SVP Server Models
The SVP Server is available in three models. Which model is selected for your facility
depends on current and expected capacity. All SVP Servers within a subnet must be
the same model type.
• SVP100: Serves 80 calls simultaneously.
• SVP020: Serves 20 powered-on handsets.
• SVP010: Serves 10 powered-on handsets.
See the following capacity tables for multiple SVP Server system capacities.
All SVP Server models are installed, configured and administered according to the
instructions in this document. The model information is available on the Software
Version screen. See section 7.3
Software Version
.
2.3 The Timing Function
NetLink SVP Servers provide the connection or "gateway" to the IP PBX for the
wireless telephones and the "timing" function for active calls. This "gateway"
function is distributed across the SVP Servers.
The number of active SVP Servers is determined dynamically. Whenever SVP
Servers are added to or removed from the system, the distribution of the "timing"
function for active calls is affected.
2.4 Internal Gatekeeper
A gatekeeper is required in certain H.323 protocol systems. The gatekeeper that
resides on the SVP Server is designed for small applications using the NetLink
Wireless Telephones under the H.323 protocol.