Specifications

ENT_MLE_015989 - Ed 02_2014-10-13
Chapter 13: Topology – Network Services
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Alcatel-Lucent Enterprise Communication Solutions
April 2014 Offer
 Data packets: 0
3.3.5.2.6 Compression algorithm
G711 and G729A:
Multi-Site configuration (one Communication Server):
 G711 in Intra-domain and G729A in Inter-Domain (WAN)
Multi-Node Configuration:
 G711 in Intra-Node and G729A in Inter-Node (WAN)
3.3.5.2.7 Survivability
DHCP
OmniTouch 8118/8128 WLAN Handsets need IP parameters to operate. When handsets are
configured to acquire IP parameters from a DHCP server, they send a DHCP request message at each
power on.
 If a DHCP server answers, the handset stores IP parameters in its flash memory
 If no DHCP server answers after several attempts, the handset tries to use IP parameters
previously stored in its flash memory.
The handset checks if the previous leased IP parameters are not reused:
 If IP parameters are not reused, the handset declares these parameters as valid and uses
them
 If IP parameters are reused by another host, the handset tries new DHCP requests until it
discovers an available DHCP server
TFTP server
OmniTouch 8118/8128 WLAN Handsets need their configuration files to operate. This configuration
file is downloaded from the primary TFTP server hosted in the Main Communication Server or from
the redundant TFTP server hosted in the Standby Communication Server when the primary TFTP
server is not available.
When no TFTP server is available, the handset tries to connect to the PCS (Passive Communication
Server) with the IP address stored in its flash memory.
When all these attempts fail, the handset reboots and tries again.
3.3.5.2.8 Localization service
The WLAN infrastructure can include an Ekahau Real Time Localization System (RTLS). This system
periodically receives localization Wi-Fi information from handsets.
The Ekahau Positioning Engine uses the WLAN network topology to calculate the location of the
mobile devices.
At a configurable interval, the Alcatel-Lucent OmniTouch 8128 WLAN Handset scans the environment
for access points. All access point identities and their measured radio field strength (RSSI) are
collected and reported to the positioning engine
The Ekahau Positioning Engine calculates the location of the Alcatel-Lucent OmniTouch 8128 WLAN
Handset by using the RSSI measurements to triangulate the mobile devices within the WLAN
environment, as soon as the access point report is received.
Note: This service is only available on Alcatel-Lucent OmniTouch 8128 WLAN Handsets.