Nortel Networks NN43001-504 manual General Wlan configuration, AP1230 Connected to APs

			General WLAN configuration 183
	AP:1230	3650 connected to APs	6509 connected to 2245
7			policy-map trust -voice-2245
			class voice-sig
			set ip dscp 40
			class voice-bearer
			set ip dscp 46
8			int fastethernet 03 (the port that
			is connected with 2245)
			switchport access vlan xx
			switchport mode access
			mls qos trust cos
			mls qos cos 5
			service-policy input
			trust-voice-2245

General WLAN configuration

The following is a list of considerations for general WLAN configuration:

•Multicast must be configured in any WLAN for Push-to-talk (PTT) on the WLAN Handset 2211.

•APs use channels 1, 6, and 11.

•APs require a 15-20dB separation for like channels to avoid cochannel interference.

•A one-way Performance domain is required (handset to call server): Max 100 ms delay, Max 30 ms jitter, and Max 2% packet loss.

•The WLAN IP Telephony Manager 2245 to AP link is (ideally) limited to 100 ms delay, 1 ms jitter and under 2% packet loss.

•The signal Strength must be -70dB or greater to provide sufficient voice quality and proper operation. Note that -60dB or better is required for 11 MB data rate.

•Wireless bridges are not permitted because they contribute to bottleneck delays.

•The transmission power must be the same on all APs and match the power setting on the handsets.

•AP bandwidth usage must be limited to 65 to 80% maximum for handset usage.

•The protocols used are: TCP, UDP, DHCP, DNS, WINS, TFTP, FTP, ARP, ICMP, and Telnet.

•The PTT feature uses the multicast IP address of 224.0.1.116 and is generally isolated to a single subnet.

Nortel Communication Server 1000

WLAN IP Telephony Installation and Commissioning

NN43001-504 01.02 Standard

Release 5.0 15 June 2007

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