This attribute is not applicable and is not displayed on CQC-based
ATM cards.
This attribute counts cells transmitted from the ATM interface
which have the EFCI bit set to 1. This count is included in the
txCell attribute. The counter is reset to zero when the component is
activated, or when any critical attribute of the component is
changed. The counter wraps to zero when it exceeds its maximum
value of (2**64)-1.