Nextelphones volunteer a help calledDirect Connectthat allows you to push a single release and connect with another Nextel exploiter . This service is typically liberal as long as the other exploiter is in the local coverage field . you’re able to even specify a group of Nextel users ( up to 100 ) that you’re able to tie to all at once , similar to adispatcher ’s radiolike constabulary or taxi company use . This pull in Nextel a very democratic supplier for troupe with a manpower that can be spread out , such as construction work .
Nextel is unique among service of process supplier because it has an solely separate special cellular meshing that has its own absolute frequency and equipment in addition to the normal cell electronic internet deal with other provider . This electronic web is based on Motorola’sIntegrated Digital Enhanced web ( iDEN)and make Direct Connect possible . It utilize the 800 MHz fortune of theradio spectrumassigned tospecialized peregrine wireless ( SMR)service . Nextel has purchase a large section of these frequencies in a significant number of the internal and external cellular service markets .
iDEN usesTDMAtechnology to separate a 25 kilocycle oftenness into six disjoined time slots . Using a compounding ofhalf - duplexandfull - duplexsignals , iDEN is able to provide :
The digital two - wayradioservice use a half - duplex signal . A normal jail cell phone call uses two separate oftenness , one to post and one to receive , for each call while a Direct Connect call uses only a individual frequency . Direct Connect relies on the proven technology ofPush To Talk ( PTT ) , commonly used in dispatch radio systems . PTT require the person speak to press a push button while lecture and then release it when they are done . The hearer then presses their push button to respond . This manner the system knows which direction the signaling should be traveling in . To enable Direct Connect , Nextel configures your phone to apply the expedition call divine service to reach the person or persons you set apart . This individual ( or group ) must utilise Nextel ’s religious service also . When you make a Direct Connect call to someone , here ’s what occur :
As you may see , the Direct Connect feature film still swear on cellular engineering to connect to the recipient(s ) . A normal " walkie talkie " style two - style radio will only operate if the radio are within a sure distance of each other . system using the Direct Connect feature can communicate anywhere within the service country specified by Nextel , typically a large urban area or even an entire country .
See the next Thomas Nelson Page for more information .
