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Menus Reference Manual: Frame Relay Set-Up Menu
2 - LMI Type
The LMI Type option specifies the type of Link Management Interface in use by the Frame Relay service provider for
the Frame Relay service.
When the LMI type is set to none, the P1700 simply creates frame relay packets and sends them on the defined PVCs.
The links are not checked for errors. There is no congestion control checking. The link is only monitored for control
signals.
Default:
[none]
Choices:
ansi, ccitt, lmi, none
Considerations:
The "ansi" LMI type operates as defined in the ANSI T1.617 Annex D specification and supports only permanent
virtual circuits.
The "ccitt" LMI type operates as defined in the ITU-T Q.933 Annex A specification and supports only permanent
virtual circuits.
The "lmi" LMI type operates as defined in the "Frame Relay Specification with Extensions Based on Proposed
T1S1 Standards" specification and supports only permanent virtual circuits.
The following options are only displayed if the auto-learning option is set to "disabled" and the LMI type is set to a
value other than "none":
3 - Polling Interval
The Polling Interval option specifies the time interval at which the P1700 will poll the Frame Relay switch for the
management status.
Default:
[10 sec]
Range:
5 to 30 seconds
4 - Enquiry Interval
The Enquiry Interval option specifies the frequency at which the P1700 will request a full status update from the Frame
Relay service. The Enquiry Interval is expressed in numbers of Polling Intervals. By default, every 6
status update instead of just a management update.
Default:
[6]
Range:
1 to 255
5 - Error Threshold
The Error Threshold option specifies how many unanswered status inquiries to send to the Frame Relay switch before
determining that the link has failed.
Default:
[3]
Range:
1 to 10
57
poll will be a full
th
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