super- +"Ž frame
In the T-carrier D2, D3, and D4 framing conventions, a 12-frame sequence. Extended superframe (ESF) defines a 24-frame sequence. See also D2, D3, D4, ESF, frame, and T-carrier.
A T1 transmission format made up of 12 T1 frames (superframe) or 24 frames (extended superframe). See D4.