Functional Description - Avaya Communication Server 1000 Installation And Commissioning Manual

WLAN IP Telephony Manager 2245 configuration
The entire network is inoperative when new software downloads to the network of WLAN IP
Telephony Manager 2245 units. When the download completes, the network comes back into
service automatically.
This functionality requires the minimum software. See
requirements
Table 21: Minimum software requirements
WLAN IP Telephony Manager 2245
WLAN Handset 2210/2211/2212
Avaya 6120/6140 WLAN Handset
If either component is at an earlier release then the system works in the current master or slave
mode.

Functional description

The WLAN IP Telephony Manager 2245 provides the following services to the handsets:
• It acts as a proxy for every wireless handset; that is, all UNIStim signaling and RTP media
to and from the wireless handset pass through the WLAN IP Telephony Manager 2245.
Except for the initial DHCP and TFTP sessions, the wireless handsets only communicate
with the WLAN IP Telephony Manager 2245.
Each WLAN IP Telephony Manager 2245 is configured with an IP address with which
all of the wireless handsets communicate. In addition, each WLAN IP Telephony Manager
2245 is configured with a pool of IP addresses. When a wireless handset registers with
a WLAN IP Telephony Manager 2245, the wireless handset is assigned one of the IP
addresses from the pool. All communication between this WLAN IP Telephony Manager
2245 and other devices (TPS, IP Phones, gateways, and other wireless handsets) is
always done through its pool IP address. In this sense, the WLAN IP Telephony Manager
2245 acts as a NAT (Network Address Translation).
• The WLAN IP Telephony Manager 2245 server tags and untags packets with the SVP
header. SVP packets have the protocol byte of the IP header configured to 0x77. SVP-
compliant APs use this proprietary tagging to give priority to tagged packets. For UDP
(UNIStim and RTP) packets going from the wireless handset to the network, the WLAN
IP Telephony Manager 2245 replaces the SVP protocol number, 0x77, with the UDP
number, 0x11. For packets going from the network to the wireless handset, the protocol
number is changed from 0x11 to 0x77.
Because the packets that traverse the network between the wireless handset and the
WLAN IP Telephony Manager 2245 are not standard IP packets (the packets use a
nonstandard protocol number), there can be no Layer 3 routing in the path. Therefore,
130 Avaya WLAN IP Telephony Installation and Commissioning
on page 130.
Device
Table 21: Minimum software
Minimum version
174.034
97.071
115.015
November 2010