This object sets the frame format for the BITS 8 Port Group, offering t1-sf or t1-esf, default esf, for T1 line type, e1-unframed, e1-crc4, or e1-dualFrame, default crc4, for E1 line type, or none when the group is configured for 2048kHz timing. Admins match this to whatever the BITS reference clock feeding the network element actually transmits, since a framing mismatch would prevent the timing signal from being correctly decoded. For example, when connecting the BITS group to a 2048kHz timing reference rather than a framed T1/E1 signal, the admin sets bits8PortGroupFrameFormat to none since framing doesn't apply to that signal type.