mscLpDS3DS1ZeroCoding 1.3.6.1.4.1.562.36.2.1.12.5.6.10.1.2

This attribute defines the zero encoding on the DS1 tributary. bit7Stuffing sets bit 7 of every timeslot to a one to guarantee ones's density. This reduces the available bandwidth of the channel by 1/8. none does no zero encoding.