Vatsal asked:
Some say the Blackberry goes to the server every 15 minutes to check for any data in the email, this process is called ‘Polling’ and others reveal that the BlackBerry does not poll the server to look for updates. It simply waits for the update to arrive and notifies the user when it does. What is the correct answer?
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Sphere: Related ContentSome say the Blackberry goes to the server every 15 minutes to check for any data in the email, this process is called ‘Polling’ and others reveal that the BlackBerry does not poll the server to look for updates. It simply waits for the update to arrive and notifies the user when it does. What is the correct answer?
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The Blackberry, like every cell type of device polls. But it does not mean what you describe. The polling that takes place is a “keep-alive” type of data packet. The purpose is to let the network know where the phone is located physically on the network at any given time. As a user moves from place to place the cell towers keep a record of those movements so that when you want to make a call or send data of any type you will already be connected and ready go. This is how you get an “always on” connection.
The polling intervals vary by providers but they are generally constant IE every so many seconds or nanoseconds.
If the network receives a piece of data destine for your device, the network sends the data immediately after it arrives. The network does not wait for any length of time beyond the time it takes to forward the message. There can be delays caused by no or poor signal in which case the information is stored until the connection is restored and is then downloaded.