Enterasys Networks CSX7000 Manuel d'utilisateur télécharger pdf (Page 249)

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Central Site Remote Access Switch 249

ONFIGURING

LTERNATE

CCESSES

X.25 Accesses

X.25 ACCESS CONFIGURATION ELEMENTS

The 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 Facilities

Each 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 L

OGICAL CHANNEL ASSIGNMENTS

The 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-channel

8 virtual circuits are supported. Therefore, the total number of PVCs and SVCs combined cannot

exceed the maximum number of VCs. X.25 logical channel numbers are assigned to each PVC, and

each two-way SVC. (Currently, one-way incoming and one-way outgoing SVCs are not supported.)

AXIMUM NUMBER OF PVCS

The maximum number of PVCs supported for this X.25 access.

AXIMUM NUMBER OF SVCS

The maximum number of SVCs supported for this X.25 access.

X.25 T

IMERS

Your PPSN provider should be able to provide you with the optimum values for the X.25 timers. If

you are unable to obtain these values, select the default values. The default values are acceptable

for the majority of network configurations.

IMER T20

This timer designates the time limit in which a restart confirmation must be returned by

the 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.

IMER T21

This timer designates the time limit in which a call connected response must be returned

by 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.

IMER T22

This timer designates the time limit in which a reset confirmation must be returned by the

DCE (the PPSN) after a reset 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.

IMER T23

This timer designates the time limit in which a clear confirmation must be returned by the

DCE (the PPSN) after a clear 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.

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Enterasys Networks CSX7000 Manuel d'utilisateur Page 249

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