Toshiba CTX28 manual Wireless Recommendations, Considerations

IP Telephony and QSIG Over IP

Installing and Operating the SoftIPT

Wireless Recommendations

Follow these recommendations when using the SoftIPT on a wireless network.

•Ensure that no more than seven SoftIPT clients are working through a single access point at one time.

•Engineer your wireless network so that there is good signal strength everywhere wireless terminals will be used.

•Use the ping program to test your wireless network. In Microsoft® Windows® perform the following:

1.Select Start > Run.

2.Type command, click OK.

3.At the prompt, type ping ñt ñl160 ñw250 (BIPU IP address, such as 159.119.112.32) and press Enter.

This starts the ping program and sends packets to the BIPU. ñl160 makes the packets the same size as a 20msec. voice packet, and the ñw250 says if there is no response in 250 msec., then the packet dropped. Periodically you can press <Ctrl><Break> keys and see the packet loss statistics. Packet loss ratios of 1% or less can be considered acceptable This tool provides quantitative results that can be used when trying to engineer the wireless network.

•Employ a channel allocation strategy. 802.11b supports multiple data rates, from 1Mbps up to 11Mbps. At 11Mbps – the objective of most networks these days, access points that are less than five channels away will interfere with each other. This would mean that access points must be on channels 1, 6, or 11. Some wireless network engineers have suggested that using channels 1, 4, 7 and 10 would provide a very important fourth channel, and have minimal interference.

•Check your environment for other access points and other equipment operating in the 802.11 band. There are many programs available that will allow you to identify access points within reach of the terminal running the program. One example is Network Stumbler (this is not an endorsement or recommendation of a particular product). Also consider that some cordless phones operate in the same 2.4GHz band as 802.11b.

Considerations

To get the best use from your SoftIPT, consider the following tips.

•Use a headset with an attached microphone to provide good call quality and privacy. If you don’t use a microphone/headset, the called party will hear an echo.

•When you are not wearing the headset, unplug it so that you can hear the phone ring. When the headset is plugged in, you can only hear ringing through the headset.

•Use Microsoft Outlook 2002 to create contacts. The SoftIPT does not work with Outlook Express.

•Dialing tips: When you click or select buttons on the SoftIPT, you will not hear button tones. Also, you must use the SoftIPT directory, keyboard or dial pad buttons to call another number. The SoftIPT does not recognize numbers that you “copy” and “paste” onto the screen.

•If you minimize the SoftIPT, incoming calls “pop up” the SoftIPT to the foreground. If you want the SoftIPT to “pop up” for incoming calls, always minimize it after each call.

•The SoftIPT disconnects immediately after the called party hangs up. If you select the Hangup button and it turns back to the Call button, it means that the other party disconnected first.

IP Telephony and QSIG Over IP

Strata CTX I&M 06/04 9-27