This attribute counts total cells containing silence (speech or
modem/fax) data received from the interface which was not
forwarded into the network, thus saving bandwidth. A channel may
go into silence due to the operation of the silence suppression
feature (refer to the silenceSuppression attribute) or for CAS
channels when the ABCD signalling bits go idle.
A cell contains 44 bytes of data from the DS0 channel(5.5 ms).
This flow is measured before compression is performed on the
channel.
This counter wraps to zero after reaching its maximum value.