Motorola BSR 2000 manual Fixed physical delay is 400 microseconds

Release 1.0	CMTS Commands
10-1600	Automatic minimum physical delay in
	microseconds - the default is 200
	microseconds
10-1600	Automatic maximum physical delay in
	microseconds - the default is 1600
	microseconds

Command Default

The fixed physical delay is 400 microseconds

526363-001-00 Rev. B MGBI 11-93