Nextel comm I920, I930 manual Making an Emergency Call, GPS Enabled 159

GPS Enabled 159

Even where location information can be calculated in such situations, it may take much longer to do so, and your location estimate may not be as accurate. Therefore, in any 911 call, always report the location to the emergency response center if you can and if you cannot, remain on your Smartphone for as long as the emergency response center instructs you.

Even where adequate signals from multiple satellites are available, your GPS feature will only provide an approximate location, often within 150 feet (45 meters) but sometimes much further from your actual location. Advice on how to improve GPS performance is provided in “Enhancing GPS Performance” on page 161.

While the GPS feature of your Smartphone can be a valuable navigational aid, it does not replace the need for careful navigating and good judgment. Never rely solely on one device for navigation. Remember that the accuracy of the location information and the time needed to obtain it will vary depending on circumstances, particularly the ability to receive signals from adequate numbers of satellites.

On emergency calls, your Smartphone uses assistance information from the Smartphone network to improve the speed and accuracy of your Smartphone’s location calculation: if such assistance information becomes unavailable, it may reduce the speed and accuracy of the location calculation.

The satellites used by the GPS feature of your Smartphone are controlled by the U.S. government and are subject to changes implemented in accordance with the Department of Defense GPS user policy and the Federal Radionavigation Plan. These changes may affect the performance of the GPS feature of your Smartphone.

Making an Emergency Call

Dial 911 to be connected to an emergency response center.

When you make an emergency 911 call, the GPS feature of your Smartphone begins to seek information to calculate your approximate location. It will take the GPS feature of your Smartphone some time to determine your approximate location. Even where your Smartphone has good access to sufficient GPS satellite signals and network assist data, it may take 30 seconds or more to determine the approximate location. This time will increase where there is reduced access to satellite signals. When your approximate location is determined, it is made available to the appropriate emergency response center.

In some cases, your local 911 emergency response center may not be equipped to receive GPS location information. For this reason, and because the GPS location information reported is only approximate or may not be available in your location (see “IMPORTANT: Things to Keep in Mind” on page 158), always report your location to the 911 operator you speak to when making an emergency call, if able, just as you would when using a phone without GPS capabilities.

Note: If you are concerned about whether your local 911 emergency response center is equipped to receive GPS location information, contact your local authorities.

In general, if your Smartphone has access to signals from more GPS satellites, your location will be determined faster and more accurately than if your Smartphone has access to signals from fewer GPS satellites.

If your Smartphone does not have adequate access to GPS satellites signals, the location of the nearest cell tower in contact with your Smartphone is automatically made available to the emergency response center, if the center has the capability to receive such information.