Nortel Networks NN43001-504 - Manual (Page 29)

WLAN IP Telephony Manager 2245 29
Interface (OAI) messaging protocol. The WLAN Application Gateway
2246 forwards the messages to the WLAN IP Telephony Manager, which
encapsulates the message for delivery to the handset.
If text-messaging functions are programmed, the handset can receive text
messages. While you access text messages, the handset is in messaging
mode. Incoming calls ring with the second call-ringing sound.
Loud noise environments
The handsets are designed to provide optimal voice quality. However, when
used in extremely loud noise environments, (for example, close to working
heavy machinery), degradation in call quality can be experienced due to
echo. Avoid using the handsets in loud noise environments.
WLAN IP Telephony Manager 2245
The WLAN IP Telephony Manager 2245 is a device that manages IP
telephony network traffic on the WLAN system. It is required to utilize the
11Mbs maximum transmission speed available in the handsets. The WLAN
IP Telephony Manager 2245 acts as a proxy for the wireless handsets. It
provides a number of services including a QoS mechanism, AP bandwidth
management, and efficient RF link utilization.
The WLAN IP Telephony Manager 2245 works with the APs to provide
Quality of Service (QoS) on the WLAN. All voice packets are encapsulated
by the wireless handsets. The encapsulated voice packets to and from the
wireless handsets are handled by the WLAN IP Telephony Manager 2245
and routed to and from a Call Server.
SpectraLink Voice Priority (SVP) is the QoS mechanism implemented on
the wireless handsets and APs to enhance voice quality over the wireless
network. SVP gives preference to voice packets over data packets on
the wireless medium, increasing the probability that all voice packets are
transmitted and with minimum delay. SVP is fully compliant with the IEEE
802.11 and 802.11a, b, and g standards.
Each subnet, where the wireless handsets operate, requires at least one
WLAN IP Telephony Manager 2245. One standalone unit can process up to
80 simultaneous calls depending on the model, as listed in
Table 2 "WLAN
Nortel Communication Server 1000
WLAN IP Telephony Installation and Commissioning
NN43001-504 01.02 Standard
Release 5.0 15 June 2007
Copyright © 2004-2007, Nortel Networks
.