Defining X.25 Parameters

Your network may require some adjustment to the values set by default for X.25 operation. You can adjust the X.25 parameter values using the Configurator, as follows:

1. Select Configure, WAN/Data Services, and X.25 from the navigation menu:



You will see the X.25 Service screen.

2. Click on the X.25 Interface link at the top of the screen. You will see the X.25 Packet Level Interfaces screen.
3. Click on Modify next to the X.25 interface whose parameters you want to adjust. You will see the Modify a X.25 Packet Level Interface screen, with the operational parameter values displayed, like this example:



Parameter	Range of Values	Default Value	Description
Interface Mode	DTE | DCE	DCE	Select whether the packet layer is to operate in DTE or DCE mode. Make sure that one end of the X.25 connection is set to DCE and the other end is set to DTE.
Configured PVCs	0..4095	0	The number of PVCs configured for this interface.
Protocol Version	x80, x84, x88	x88	Select the level of protocol compliance with the X.25 standards.
Max. Packet Size (Local)	16, 32, 64, 128, 256, 512, 1024, 2048	1024	The maximum negotiated packet size that will be accepted by this interface.
Max. Window Size (Local)	1..7	7	The maximum negotiated window size that will be accepted by this interface.
Default Packet Size (Local)	16, 32, 64, 128, 256, 512, 1024, 2048	128	The default packet size for this interface.
Default Window Size (Local)	1..7	2	The default window size for this interface.
Max. Packet Size (Remote)	16, 32, 64, 128, 256, 512, 1024, 2048	1024	The maximum negotiated packet size that will be accepted by the remote interface.
Max. Window Size (Remote)	1..7	7	The maximum negotiated window size that will be accepted by the remote interface.
Default Packet Size (Remote)	16, 32, 64, 128, 256, 512, 1024, 2048	128	The default packet size for the remote interface.
Default Window Size (Remote)	1..7	2	The default window size for the remote interface.



4. Make the necessary changes to the parameter values and click on the Save button.
5. Reset the unit. Select Administration and System Reset from the navigation menu. Select Configuration as the Reset Type. Then, click on the Reset button.

End of procedure.