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 | Configuration | 
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 | Configuring the X.25 Link | 
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 | Enter or modify field values as required (refer to the field descriptions | |
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 | below). | 
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| Table  | 
 | Modify IP over X.25 Defaults Field Descriptions | |
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 | Idle Timer | Sets the number of seconds a circuit stands idle | 
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 | before it is cleared by IP. The range is 0 to 32767. | 
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 | The default is 600. | 
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 | Hold Timer | Sets the number of seconds a circuit may be | 
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 | inactive before it is designated as inactive. | 
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 | Inactive circuits may be cleared when all other | 
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 | circuits are unavailable and a connection request | 
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 | is received by IP. Do not set the hold timer to a | 
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 | value greater than the idle timer. The range is 0 to | 
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 | 32767. The default is 300. | 
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 | MTU Size | The maximum transmission unit size in octets | 
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 | (bytes). The range is 20 to 8192. The default is | 
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 | 2048. For DDN configured interfaces, it must be | 
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 | less than or equal to 1007. | 
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 | System Max. IP | The maximum number of IP connections that can | 
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 | Connections | be simultaneously active for the whole system. | 
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 | This is a global parameter. The default value for | 
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 | this parameter is 256 connections. | 
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| Step | 5. Click on OK to return to the “Configure X.25 Card” window when you | ||
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 | have finished configuring the Internet address. | |
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 | Verifying Level 3 Values | |
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 | If you subscribe to a public network, the network provider will supply the | |
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 | appropriate settings for most level 3 parameters. These settings will | |
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 | differ depending on the network provider and the type of service to which | |
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 | you subscribe. Refer to your Network Subscription Form for the correct | |
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 | values for your configuration. | |
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 | Follow the steps below to verify level 3 values: | |
| Step | 1. At the “Configure X.25 Card” window, select Verify Level 3 Values. | ||
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 | The following dialog appears: | |
| Chapter 3 | 41 |