To view the currently active participants in the channel, select Options > Active members.To invite a participant to a channel, select Options > Send invitation.Push to talk logTo open the push to talk log, select Options > PTT log. The log shows the date, time, duration, and other details of your push totalk calls.Tip: To initiate a one-to-one call from PTT log, select the desired log event and press the voice key.Exit push to talkSelect Options > Exit. Select Yes to log out and close the service. Press No if you want to keep the application active on thebackground.Device securitySelect Menu > Tools > Settings > Security > Phone and SIM.You can modify the security settings for the PIN code, automatic lock, and SIM card change, and change codes and passwords.Avoid using codes that are similar to emergency numbers to prevent accidental dialing of the emergency number.Codes are shown as asterisks. When you change a code, enter the current code, then the new code twice.Define security settingsTo define device and SIM card, certificate management, and security module settings, select a setting and Options > Open.When calls are limited to closed user groups, calls may be possible to the official emergency number programmed into yourdevice.Define the following settings:• PIN code request — Select On to request that the PIN code is entered each time the device is switched on. This setting cannotbe changed if the device is switched off. Some SIM cards do not allow turning off the PIN code request.• PIN code — Change the PIN code. The PIN code must be 4 to 8 numbers long. The PIN code protects your SIM card againstunauthorized use and is provided with the SIM card. After three consecutive incorrect PIN code entries, the PIN code is blocked,and you need to use the PUK code to unblock it before you can use the SIM card again.• PIN2 code — Change the PIN2 code. The PIN2 code must be 4 to 8 numbers long. The PIN2 code is required to access somefunctions of the device and is provided with the SIM card. After three consecutive incorrect PIN2 code entries, the PIN2 codeis blocked, and you need to use the PUK2 code to unblock it before you can use the SIM card again.• Autolock period — Set a time-out after which the device is automatically locked and can be used only if the correct lock codeis entered. Enter a number for the time-out in minutes, or select None to turn off the autolock period. When the device islocked, you can still answer incoming calls and calls may still be possible to the official emergency number programmed intoyour device.• Lock code — The new code can be 4-255 characters long. Both alphabets and digits can be used, and both uppercase andlowercase alphabets are possible. The device notifies you if the lock code is not properly formatted.• Lock if SIM changed — Set the device to ask for the lock code when an unknown, new SIM card is inserted into your device.The device maintains a list of SIM cards that are recognized as the owner’s cards.• Allow remote lock — If you set this option on, you can lock the device by sending a predefined text message from anotherphone. When you set this option on, you need to enter the remote lock message and confirm the message. The messagemust be at least 5 characters long.• Closed user group (network service) — Specify a group of people to whom you can call and who can call you.• Confirm SIM services (network service) — Set the device to display confirmation messages when you are using a SIM cardservice.Change the barring passwordTo change the password used for barring voice, fax, and data calls, select Menu > Tools > Settings > Call barring > Cellular callbarring > Options > Edit barrings passw.. Enter the current code, then the new code twice. The barring password must be fourdigits long. For details, contact your service provider.Fixed dialingWhen fixed dialing is activated, calls may be possible to the official emergency number programmed into your device.Select Menu > Contacts > Options > SIM contacts > Fixed dialling contacts.With the fixed dialing service, you can restrict calls from your device to only certain phone numbers. Not all SIM cards supportthe fixed dialing service. Contact your service provider for more information.C a l l s a n d v o i c e a p p l i c a t i o n sCopyright © 2006 Nokia. All Rights Reserved. 25