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LinkServer license cost varies according to the number of so-called "points" that define how many Device Servers and Data Terminals may stay connected simultaneously. No more than a certain number of Device Servers and Data Terminals can be connected to your LinkServer at any given moment. This limit is enforced by the AuthKey.
The AuthKey does not actually track connection itself -- it does not constantly check to see if a certain Device Server is still connected to the server. The AuthKey only takes note of Device Servers when they are logging in. A connection is considered to last from the moment the DS logs in and for the next 24 hours after that.
This means that when the Device Server logs in to the LinkServer, the AuthKey takes note of this and starts a 24-hour timer for this specific Device Server. If this Device Server disconnects and reconnects within the next 24 hours since previous login the timer is restarted. If this Device Server disconnects and does not re-connect for 24 hours or more, then this Device Server is no longer considered to be connected and another Device Server can "take its place".
There are three important AuthKey settings that define how many Device Servers and Data Terminals may stay connected at the same time:
| • | Desired license limit (in points) |
| • | "Cost" of Device Server (in points) |
| • | "Cost" of Data Terminal (in points) |
There are three important AuthKey settings that define how many devices may stay connected at the same time.
Example 1:
Supposing, you have a license limit of 100 points, the cost of Device Server is 10 points and the cost of Data Terminal is 30 points. It means that you can connect:
| • | 4 Device Servers and 2 Data Terminals |
| • | 1 Device Server and 3 Data Terminals |
Example 2:
| • | Supposing, you have a license for 5 Device Server connections. |
| • | A Device Server called "DS1" connects. Now you have 4 connections available. |
| • | After two hours, "DS1" disconnects. You still only have 4 connections available. |
| • | 22 more hours pass, and "DS1" does not try to connect again. Now you have 5 connections available. |
| • | Device Server called "DS2" connects. You have 4 available connections left. |
| • | "DS1" connects again. You have 3 connections left. |
| • | "DS2" disconnects. You still have 3 connections left. |
It is noteworthy that one AuthKey can serve several servers running LinkServer software. This is possible, legal, and does not change the total number of Device Servers that can be simultaneously connected to all servers that rely on this single AuthKey.
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