usdFrDlcmiPollingInterval 1.3.6.1.4.1.4874.2.2.10.1.1.2.1.5

This is the number of seconds between successive status enquiry messages sent by the DTE. Pertains to DTE/NNI operation only. This parameter can be reconfigured only when the Frame Relay interface is acting as a DTE or NNI.