Whether a subrack for a T63B cabinet can be installed in a B63 cabinet

Question:
During delivery for network expansion, T63B cabinets and required subracks are delivered. B63 cabinets and required subracks, however, are already used on the network. Field engineers think it is difficult to distinguish the cabinets and subracks. They doubt whether subracks required by T63B cabinets can be directly installed in B63 cabinets and whether subracks required by B63 cabinets can be directly installed in T63B cabinets.
Analysis:
The question is generated because engineers do not know about the difference between T63B cabinets and B63 cabinets. The front and rear of BWS 1600G subracks are very close to the front door and rear door of a cabinet. If a subrack for a T63B cabinet is directly installed in a B63 cabinet, the rear part of the subrack bumps into the rear door of the cabinet. If a subrack for a B63 cabinet is directly installed in a T63B cabinet, the front of the subrack will bump into the front door of the cabinet. Therefore, subracks must be installed in corresponding cabinets.
Answer:
Subracks for a T63B cabinet cannot be directly installed in a B63 cabinet.
Subracks for a B63 cabinet cannot be directly installed in a T63B cabinet.
Suggestion and conclusion:
B63 cabinets and T63B cabinets have different dimensions, and can house only supported subracks.

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