This read-write enumerated setting selects the position and buffer depth of the T1/E1 line's jitter attenuator when it is enabled, with options for no attenuator, or 32-bit or 128-bit buffers applied on the receive or transmit side. Administrators, under qualified supervision since this is a private-mode setting, configure it to control how much timing jitter is smoothed out of the T1/E1 signal and on which side of the link. For example, setting this to t1e1RxAttenuator128Bits(3) applies a deeper 128-bit jitter buffer on the receive path for a line experiencing significant clock jitter.