information is sent in short bursts of data over themobile network. The benefit of sending data in packetsis that the network is occupied only when sending orreceiving data. As GPRS uses the network efficiently, itallows for quick data connection set-up and fast datatransmission speeds.You must subscribe to the GPRS service. For availabilityand subscription to GPRS, contact your networkoperator or service provider.Enhanced GPRS (EGPRS) is similar to GPRS, but it enablesfaster connection. For more information on theavailability of EGPRS and data transfer speed, contactyour network operator or service provider. Note thatwhen you have selected GPRS as a data bearer, thedevice uses EGPRS instead of GPRS if this is available inthe network.During a voice call, you cannot establish a GPRSconnection, and any existing GPRS connection is put onhold unless the network supports dual transfer mode.UMTSUMTS (universal mobile telecommunications system) is3G mobile communication system. Besides voice anddata, UMTS enables audio and video delivery to wirelessThe GSM network is indicated with , the UMTSnetwork with .When you use your device in GSM and UMTS networks,multiple data connections can be active at the sametime, and access points can share a data connection. Inthe UMTS network, data connections remain activeduring voice calls. You can, for example, surf the Webfaster than previously possible while simultaneouslyspeaking on the phone.Wireless local area network(WLAN)Some places, like France, have restrictions on the use ofwireless LAN. Check with your local authorities for moreinformation.Features using wireless LAN, or allowing such featuresto run in the background while using other features,increase the demand on battery power and reduce thebattery life.This device can detect and connect to a wireless localarea network.If you move the device to another location within theConnectivityfile:///C:/USERS/MODEServer/grawei/29555801/rm-10_zeus/en/issue_2/rm-10_zeus_en_2.xml Page 63 May 22, 2006 5:43:34 AMfile:///C:/USERS/MODEServer/grawei/29555801/rm-10_zeus/en/issue_2/rm-10_zeus_en_2.xml Page 63 May 22, 2006 5:43:34 AM