Nortel Networks MOG6xx - Manual (Page 36)

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Overview
• RTP packets between the wireless telephone and the WLAN IP Telephony Manager 2245
always contain 30 milliseconds (ms) worth of voice, regardless of what has been configured
on the BCM. The WLAN IP Telephony Manager 2245 repackages the RTP packets to conform
to the size that has been configured in the BCM. This provides more efficient use of the
available RF bandwidth at the expense of slightly increased jitter and latency.
• The WLAN IP Telephony Manager 2245 is configured with a maximum allowable number of
simultaneous media streams on a single AP. The WLAN IP Telephony Manager 2245 keeps
track of the number of media streams on each AP and blocks calls to and from a wireless
handset that would exceed the configured capacity.
• There is a keep-alive packet exchange that runs between the wireless handset and the WLAN
IP Telephony Manager 2245 every 30 seconds. If the wireless handset detects the WLAN IP
Telephony Manager 2245 is unreachable, the wireless handset resets itself and attempts to
re-establish a connection with the master WLAN IP Telephony Manager 2245, where there is
more than one WLAN IP Telephony 2245 in the system.
Capacities
The WLAN IP Telephony Manager 2245 requires a CAT5 cable connection between its network
port and the Ethernet switch. The WLAN IP Telephony Manager 2245 auto-negotiates to the type
of port on the Ethernet switch and supports 10BaseT, 100BaseT, full-duplex, and half-duplex port
types.
In any subnet where wireless handsets are used, each subnet must have one or more WLAN IP
Telephony Managers 2245. A WLAN IP Telephony Manager 2245 group on a subnet consists of
one or more WLAN IP Telephony Managers 2245 and their associated wireless handsets. Only
one master WLAN IP Telephony Manager 2245 can be on a subnet.
The WLAN infrastructure, if properly deployed, can support the same capacity offered in the
BCM for IP terminals. When planning for WLAN set deployment, follow standard BCM IP
terminal engineering practices. When planning your WLAN infrastructure deployment, follow
your AP vendor’s standard voice deployment site survey practices.
WLAN IP Telephony Manager 2245 firmware upgrade
When a WLAN IP Telephony Manager 2245 reboots or is manually reset by the operator, the
following occurs:
1 The WLAN IP Telephony Manager 2245 checks its version of firmware against the version on
the TFTP Server.
2 If the firmware versions are different, the WLAN IP Telephony Manager 2245 downloads the
new firmware.