Cabletron Systems CyberSWITCH CSX150 User Manual

Also see for CyberSWITCH CSX150: User guide Quick start guide

Contents

USER’S GUIDE184 CyberSWITCHX.25 A CCESS C ONFIGURATION E LEMENTSThe X.25 Access configuration elements are divided into seven different categories:• X.25 Logical Channel Assignments• X.25 Timer Configuration• X.25 Reliability, Windows, and Acknowledgment Facilities• X.25 Quality-of-Service Facilities• X-25 Charging -Related Facilities• X-25 Restriction Facilities• X.25 Miscellaneous FacilitiesEach category has multiple configuration elements that must be entered.Note: If you are unsure of any of the configuration values, use the default values where provided.X.25 LOGICAL CHANNEL ASSIGNMENTSThe maximum number of permanent virtual circuits (PVCs) and switched virtual circuits (SVCs)to be supported. For X.25 over B-channel, a total of 48 virtual circuits are supported; over D-channel8 virtual circuits are supported. Therefore, the total number of PVCs and SVCs combined cannotexceed the maximum number of VCs. X.25 logical channel numbers are assigned to each PVC, andeach two-way SVC. (Currently, one-way incoming and one-way outgoing SVCs are not supported.)MAXIMUM NUMBER OF PVCSThe maximum number of PVCs supported for this X.25 access.MAXIMUM NUMBER OF SVCSThe maximum number of SVCs supported for this X.25 access.X.25 TIMERSYour PPSN provider should be able to provide you with the optimum values for the X.25 timers. Ifyou are unable to obtain these values, select the default values. The default values are acceptablefor the majority of network configurations.TIMER T20This timer designates the time limit in which a restart confirmation must be returned bythe DCE (the PPSN) after a restart request has been issued by the DTE (the CyberSWITCH).The range for the this timer is 1 to 200 seconds. The default for this timer is 180 seconds.TIMER T21This timer designates the time limit in which a call connected response must be returnedby the DCE (the PPSN) after a call request has been issued by the DTE (the CyberSWITCH).The range for the this timer is 1 to 200 seconds. The default for this timer is 200 seconds.TIMER T22This timer designates the time limit in which a reset confirmation must be returned by theDCE (the PPSN) after a reset request has been issued by the DTE (the CyberSWITCH). Therange for the this timer is 1 to 200 seconds. The default for this timer is 180 seconds.TIMER T23This timer designates the time limit in which a clear confirmation must be returned by theDCE (the PPSN) after a clear request has been issued by the DTE (the CyberSWITCH). Therange for the this timer is 1 to 200 seconds. The default for this timer is 180 seconds.