/sys$common/syshlp/NET$MGMT_HELP.HLB  —  hdlc  Link  counters
     BUFFER UNAVAILABLE ERRORS

         Number of times that the Physical layer reported that no buffer was
         available to hold a message. This counter is not supported in all
         implementations.

     CRC ERRORS RECEIVED

         Number of frames received that had a bad CRC.

     TIMES PDU RECEIVE OVERRUN

         Number of times a physical line indicated an overrun condition to
         the Data Link layer. This counter is not supported in all
         implementations.

     TIMES PDU TRANSMIT FAILED

         Number of times that an attempt to send a frame failed.

     UP TRANSITIONS

         Number of times that the entity's status attribute state has changed
         from off to on.
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