Planning Page 29 of 206
WLAN IP Telephony Installation and Configuration
Each wireless handset effectively uses two IP addresses in the wireless
subnet: one for the physical wireless handset and a second alias IP address
which is used on the WLAN IP Telephony Manager 2245. When allocating
addresses in a subnet scope on the DHCP server, a contiguous block of IP
addresses as large as the number of wireless handsets supported must be
marked as unavailable for distribution for other uses by the DHCP server.
When multiple WLANs are connected to a single Nortel Networks Wireless
Security Switch (WSS), the DHCP server may require specific configuration
modifications. Please refer to the documentation for the specific WSS being
used for any special DHCP configuration requirements.
TFTP Server planning
A TFTP Server (RFC1350) holds the software images for updating the
WLAN Handsets 2210/2211 and the WLAN IP Telephony Manager 2245.
Assuming the IP address of the TFTP server has been configured on the
wireless handset, each time a wireless handset is powered on, the wireless
handset checks its version of firmware against the firmware on the TFTP
Server, and if the version is different, the wireless handset downloads the new
firmware from the TFTP Server. Similarly, when a WLAN IP Telephony
Manager 2245 reboots, or is manually reset by the operator, it checks its
version of software against the version on the TFTP Server. If the versions are
different, the WLAN IP Telephony Manager 2245 downloads the new
software.
The following information must be considered when planning for a TFTP
Server:
• The process for the wireless handset to check its version of firmware
against what is available on the TFTP Server takes less than two seconds
on a quiet network.
• If the TFTP Server is offline or unreachable, the wireless handset tries for
about 10 seconds before giving up and using its existing version of
firmware.
• The wireless handset firmware downloading process takes about 30
seconds.
To Next Page
Loading...
