Specifications

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Chapter 13: Topology – Network Services
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Alcatel-Lucent Enterprise Communication Solutions
April 2014 Offer
In a Site to Site configuration, a call between two OmniTouch WLAN handsets (OT8118/OT8128) is
treated as an IP Touch phone call with the implementation of Direct RTP. The G711 algorithm is used
for local communication on each site and G729A is configured on the WAN to reduce bandwidth
consumption.
Security
Wi-Fi sets support the WPA2 security mechanism. This protocol is based on the final IEEE 802.11i
amendment of the 802.11 standard.
WPA2, like WPA, has two operational modes: Enterprise and Personal.
Enterprise mode uses:
 PEAP-MSCHAPv2
 EAP-TLS
 EAP-FAST
Personal mode:
 Based on a PreShared Key model, WPA2, like WPA, creates a new session key at every
association.
The encryption keys used for each client are unique on the network and specific to each client.
Ultimately, every client sends packets over the air, encrypted with a unique key. WPA2 is more robust
than WPA. WPA2 uses the AES encryption algorithm instead of RC4 Security (used by the first version
of WPA).
Rogue AP detection is performed by the WLAN controller.
Site requirements
The existing WLAN infrastructure must be studied for compatibility with the Wi-Fi telephony. This
includes the following tasks:
 All WLAN products must be part of a certified list for compliancy.
 The topology must provide enough bandwidth for voice communication.
 The IP scheme used (L2 and L3) needs to be analyzed to fit the architecture.
To ensure correct RF coverage for providing seamless handovers, a Voice site survey is mandatory.
Refer to the "Alcatel-Lucent OmniTouch 8118/8128 WLAN Handsets on Specific WLAN
Infrastructures" available on the Business Portal.
3.3.6 OmniMobility DECT
3.3.6.1 DECT infrastructure
To meet corporate user mobility requirements in company premises, the Alcatel-Lucent OmniPCX
Enterprise Communication Server offers a wireless telephone service based on the international DECT
(Digital Enhanced Cordless Telecommunications) standard.
The DECT standard is a cellular technology that uses the 1880/1900 MHz frequency band. DECT is
available:
 In all European countries
 In a large number of Asian and African countries. The 1900/1930 MHz bandwidth is used for
China, Thailand and Latin American.