SpectraLink SVP020, SVP100 NetLink SVP Server Overview, SVP Server Models, The Timing Function

SpectraLink Corporation	Installation, Configuration, and Administration
	NetLink SVP Server (within IP environments)

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.

2.1SpectraLink 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.

2.2SVP 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.

2.3The 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.

2.4Internal 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.

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