SpectraLink NetLink Wireless Telephones Best Practices White Paper Wireless Telephone - Manual

White Paper Page 4 and provides consistent coverage. 2.2.1 Site Surveys Performing a site survey can minimize the possibility of dead spots. The AP equipment provider can usually perform a site survey. While many tools exist that allow customers to perform their own assessment, SpectraLink recommend...

White Paper Page 5 2.3 Capacity The network capacity requirements also factor into the number of APs required, although in most cases the coverage area is the primary factor. Data traffic is very bursty and sporadic, but data applications can tolerate network congestion with reduced throughput and s...

White Paper Page 6 The maximum number of simultaneous telephone calls an AP can support is determined by dividing the total available bandwidth by the percentage of bandwidth used for each individual call. Approximately 20-40% of the AP bandwidth is reserved for channel negotiation and association a...

White Paper Page 7 2.3.2 Push-to-Talk Multicasting Considerations The push-to-talk (PTT) mode of the NetLink i640 Wireless Telephone uses SpectraLink’s proprietary SpectraLink Radio Protocol (SRP) ADPCM encoding. If a PTT broadcast is active (i.e. a user presses the PTT button), the feature will use...

White Paper Page 8 User Calling Intensity Light Moderate Heavy Erlangs per User 0.10 0.15 0.20 Max Active Calls per AP Users Supported per AP (1% Blocking Probability) 1 1 1 1 2 2 2 2 3 4 3 3 4 8 6 4 5 13 9 7 6 19 13 10 7 25 17 13 8 31 21 16 9 37 25 19 10 44 30 22 11 51 34 26 12 58 39 29 Users Suppo...

White Paper Page 9 3.0 Network Infrastructure Considerations 3.1 Physical Connections The NetLink Wireless Telephone infrastructure components should connect to the facility’s local area network (LAN) using Ethernet switches, as opposed to Ethernet hubs, to provide adequate bandwidth and limit traff...

White Paper Page 11 4.0 Quality of Service 4.1 SpectraLink Voice Priority (SVP) Quality of Service (QoS) is a means of guaranteeing a level of service that will result in a network connection of adequate quality. Typically this results in providing different levels of service for different applicati...

White Paper Page 13 5.0 Security 5.1 Security Concerns Security provisions are critical for any enterprise Wi-Fi network. Wireless technology does not provide any physical barrier to the network, since radio waves penetrate walls and can be monitored and accessed from outside a facility. The extent ...

White Paper Page 14 5.1.3 Emerging Security Standards Recognizing the need for stronger security standards, the IEEE is developing the 802.11i standard, which is expected to be ratified in late 2004. The 802.11i standard includes stronger encryption, key management, and authentication mechanisms. An...

White Paper Page 16 5.5 Virtual Private Networks (VPNs) Virtual Private Networks are secured private network connections. VPNs typically employ some combination of encryption, digital certificates, strong user authentication and access control to provide security to the traffic they carry. They usua...