SpectraLink NetLink Wireless Telephones Best Practices White Paper Wireless Telephone manual

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data transmission rate of 2 Mb/s.

A NetLink SVP Server is required for applications using an IP telephony server or using more than four NetLink Telephony Gateways. A NetLink SVP Server can also be used with four or fewer NetLink Telephony Gateways to allow a maximum data transmission rate of 11 Mb/s.

A single NetLink SVP Server supports 120 simultaneous calls when used with NetLink Telephony Gateways, or 80 simultaneous calls with an IP telephony server. Multiple NetLink SVP Servers can be used to increase capacity to support up to 850 total calls and 8,000 Wireless Telephones for IP telephony server interfaces. When used with NetLink Telephony Gateways, the total number of users is limited to 640 total users (40 NetLink Telephony Gateways). Refer to the NetLink SVP Server Installation, Setup, and Maintenance for more information about the maximum number of simultaneous calls and Wireless Telephones supported by multiple NetLink SVP Servers.

For installations with multiple NetLink SVP Servers, call resources are automatically allocated between the APs and the NetLink Wireless Telephones by those devices’ MAC addresses. Allocation is done by dividing the MAC address by the number of NetLink SVP Servers and assigning the device based on the remainder. For example, if three NetLink SVP Servers are used, the first NetLink SVP Server is assigned to all APs and NetLink handsets with MAC addresses that are even multiples of three. The second NetLink SVP Server is assigned to MAC addresses with a remainder of one when divided by three, and the third is assigned to the MAC addresses with a remainder of two. In most instances, because of the large number of Wireless Telephones and APs expected in such an application, the distribution of call processing will be relatively even across all NetLink SVP Servers.

If a NetLink SVP Server other than the SVP Server assigned as the ‘master’ fails and can be no longer detected, the call processing will be automatically redistributed among the remaining servers. Some active calls may be lost during this process, but the process does not require any manual re-configuration. To minimize downtime related to a failed master NetLink SVP Server or a single server, a spare NetLink SVP Server can reside on the network and in the case of a failure, the network administrator can assign the IP address of the failed unit to the replacement SVP Server

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