© Aastra – 2012 SIP-DECT 4.0 RFP 43 WLAN June 2012

© Aastra Aastra confidential information / for training purpose only Wireless LAN

© Aastra Aastra confidential information / for training purpose only WLAN Standards (Summary) a (1999) – Physical Layer in 5 GHz band – data rate up to 54 Mbit/s using OFDM b (1999) – data rate up to 11 Mbit/s using CCK / DSSS g (2003) – Physical Layer in 2,4 GHz band – data rate up to 54 Mbit/s using OFDM – backward compatible to b n (2009) – Physical Layer in 2,4 GHz and 5 GHz band – data rate up to 600 Mbit/s using OFDM / MIMO – backward compatible to b/g / a » i (2004) – additional WLAN security – AES, TKIP, EAP (base for WPA2) » e (2005) – Medium Access Control(MAC) Quality of Service Enhancements – automatic power save delivery

© Aastra Aastra confidential information / for training purpose only WLAN Applications environments hotels hospitals office buildings production halls.... applications »healthcare »logistics »Internet / network ».... devices »laptops »PDAs »phones »....

© Aastra Aastra confidential information / for training purpose only WLAN Deployment customer requirement application, devices, coverage, bandwidth Planning site survey, building details, disturbing devices channels, security, if possible pre deployment Installation deployment, device configuration, network, security settings, client configuration, backup Verfication site survey, fine tuning, check data rates, check stability, user verfication by customer Documentation building maps, verification results, photos!

© Aastra Aastra confidential information / for training purpose only WLAN Frequency (General) There are 3 overlap-free channels in 2.4 GHz ISM band (using b/g + n-HT20) e.g. 1 – 6 – 11. Each channel has a bandwidth of 22MHz. APs should always be 5 channels seperated from each other. Ch: Freq: Channel Frequency 2.4 GHz ISM (channels EMEA: 1-13, NA: 1-11) Channel Frequency ,…, GHz ISM In 5 GHz all channels are overlapping free. The usage of certain channels is bound to regulatory requirements, Access Point capabilities (DFS, TPC) and indoor / outdoor usage.

© Aastra Aastra confidential information / for training purpose only WLAN Frequency Planning For planning the channels for a base of a site-covering radio network, the distance between two base stations with the same frequency should be at least double that of the coverage. The coverage can be adjusted with the help of the Output Power Level parameters by 6% / 12% / 25% / 50% or 100%. Using the n HT40 mode two WLAN channels will be combined for more troughput. This reduce the number of non overlapping channels in 2.4 GHz frequency secondaryprimary (1) HT40 (double channel) vs HT20 (single channel)

© Aastra Aastra confidential information / for training purpose only WLAN n MIMO Using n, AccessPoints and clients (stations) can use multiple antennas to transmit or receive data on individual streams. Multiple Input Multiple Output (MIMO) allow higher data rates and provide better radio conditions as signals can be received by multiple antennas. ModeHT20HT40 1x x x x maximal phy. data rates (Mbit/s) The RFP43 support the 2x2 antenna mode with the maximal data rate of 300 Mbit/s data rates vary on the radio environment and devices capabilites.

© Aastra Aastra confidential information / for training purpose only WLAN Security = Authentification + Encryption Authentification: SSID – Service Set Identifier Access filter e.g. MAC address filter, external radius server Encryptiondetails WEP (Wired Equivalent Privacy) Not recommended, because this is not safe !! usage to support old clients with no WPA support WPA Wi-Fi Protected Access WPA 2 using AES is presently the most secure WLAN encryption in the market WPA 1 / 2 PSK (pre shared key) for households and small enterprise using a secret / password on all WLAN stations WPA 1 / 2 Enterprise for SME / MLE using a Radius Server (802.1x) for the station authentication e.g. using EAP-TLS

© Aastra Aastra confidential information / for training purpose only WPA Authentification with a Radius Server Authentification Radius Server WLAN | LAN Master Secret EAP / 802.1x Authentification Key Normal data traffic Station Access Point Key Normal data traffic LAN Client Certificate Private + Public Key CA Certificate Private + Public Key Server Certificate Private + Public Key CA Certificate Private + Public Key

© Aastra Aastra confidential information / for training purpose only VLAN 802.1q The RFP 42 / 43 supports VLAN tagging (separation) for up to 4 WLANs and Voice data. e.g. for enabling the separation of different WLAN network‘s and the telephone network. Data VoIP (e.g untagged) WLAN Data RFP 42/43 Switch DECT Voice WLAN Data Internet corporate LAN Voice LAN

© Aastra Aastra confidential information / for training purpose only WLAN Profile Configuration Service Set Identifier (SSID): Name / Description of this WLAN VLAN tag: tag WLAN data to this VLAN and receive with this tag mode: WLAN mode n prefered Hidden SSID mode: send no SSID in beacon packets Create WLAN profiles which later can be assigned to the RFPs. Profiles have to be defined for RFP types e.g. RFP(L)42 or RFP(L)43

© Aastra Aastra confidential information / for training purpose only WLAN Profile Configuration (2) Select the security type: open, WEP, WPA(2)-PSK, WPA(2)-802.1x

© Aastra Aastra confidential information / for training purpose only WLAN Profile Configuration (3) Distribution interval: key exchange interval for WPA Radius Settings: IP address and Port of the Radius server and the secret to authenticate the basestation as radius client WME: Wireless Media Extentions (for QoS, required for n) Multiple SSID: one profile can have up to 4 different SSIDs Be aware that on RFP(L) 42 only SSID1 can be broadcast. All other SSIDs have to be known to the station as they are hidden SSIDs.

© Aastra Aastra confidential information / for training purpose only RFP WLAN Configuration Assign the WLAN profile to your RFP’s (42 / 43). WLAN profile: ID of the WLAN profile (need to match RFP type) channel: (selection depend on profile) 1-14 = 2,4 GHz b/g or n = 5 GHz a or n Output power level: WLAN transmit power HT40: activate WLAN channel bundle for more troughput. In 2.4 GHz this reduce the number of overlapping free channels! Use only for single spots. The RFP(L) 43 can operate as WLAN Access Point and OMM at the same time. If the OMM reside on a RFP (L) 42 the WLAN function is disabled. The RFP type need to be known in the OMM to apply a WLAN Profile. e.g. RFP is connected or type is set by OMP