cmLoopTestParameter1 is a read-write integer whose meaning depends on the loop test type; for an EOC loopback test specifically, it specifies which network element to loop, with 0 addressing the CPE (NT) directly and 1-6 indicating a number of hops away from the line card (LT). An administrator sets this when running an EOC-based loopback test to target a specific repeater or device along the DSL loop rather than the endpoint. For example, to test a repeater two hops from the line card instead of the CPE itself, the operator would set cmLoopTestParameter1 to 2.