You are designing a multi-story dwelling and need to place the CTR's. Every floor is not available. What is the alternate spacing for the CTRs?

Every 2 floors is acceptable spacing but the question asks for the alternate spacing defined by the standard, which specifically defines 3 floors as the maximum permitted interval.

Telecommunications cabling standards for multi-dwelling units (MDUs) specify that consolidation/telecommunications rooms should ideally be placed on every floor, but when that is not feasible the maximum alternate spacing allowed is every 3 floors. This limit controls the maximum horizontal cable run length and maintains signal integrity to each served unit. Exceeding 3 floors risks violating maximum cable length requirements for the horizontal subsystem.

Every 4 floors exceeds the maximum alternate spacing permitted by telecommunications MDU cabling standards and would likely result in horizontal cable runs that exceed allowable length limits.

Every 5 floors far exceeds the permitted alternate spacing and would violate maximum horizontal cable distance requirements.

Placement at only the 1st floor and midway is an arbitrary approach not defined by the standard and does not account for consistent coverage across all floors.