P u s h t o t a l k60 Copyright © 2006 Nokia. All rights reserved.• To send a callback request fromthe callback request list in thePush to talk menu, selectCallback inbox. Scroll to acontact, and select Options >Send callback.Respond to a callbackrequestWhen you receive a callback request,Callback request received is shownin the standby mode. Select View.The list of contacts who have sentyou callback requests is shown.To make a one-to-one call, press thePTT key.To send a call request back to thesender, select Options > Sendcallback.To delete the request, select Delete.To view the sender's PTT address,select View.To save a new contact or to add thePTT address to a contact, selectOptions > Save as or Add to contact.■ Add a one-to-onecontactYou can save the names of personsto whom you often makeone-to-one calls in the followingways:• To add a PTT address to a name inContacts, search for the desiredcontact, and select Details >Options > Add detail > Push totalk address.• To add a contact to the PTTcontacts list, select Menu > Pushto talk > Contacts list >Options > Add contact.• To add a contact from thechannel list, connect to the PTTservice, select Channel list, andscroll to the desired channel.Select Members, scroll to themember whose contactinformation you want to save,and select Options. To add a newcontact, select Save as. To add aPTT address to a name inContacts, select Add to contact.■ PTT channelsWhen you call a channel, allmembers joined to the channel hearthe call simultaneously.There are three types of PTTchannels:• Provisioned channel — Apermanent channel is created bythe service provider.• Public channel — Every channelmember can invite other persons.