Cage and cage assembly

A cage configured to be attached to a first face of an external board and accommodate a plurality of external devices inserted into the cage along a depth direction substantially orthogonal to the first face,

• wherein each of the external devices is an optical module, or an optical module and a heat sink for cooling the optical module, and
• wherein a direction orthogonal to the depth direction is defined as a vertical direction, and a direction orthogonal to the depth direction and the vertical direction is defined as a horizontal direction,
• the cage comprising at least one vertical unit, the vertical unit defining a port set in which a plurality of ports as spaces accommodating the external devices are aligned in a line in the vertical direction, and wherein in the plurality of ports aligned in a line in the vertical direction, a first port is the port in which the optical module is accommodated, and a second port located adjacent to the first port in the vertical direction and located above the first port is the port in which the heat sink is accommodated,
• wherein the vertical unit includes two vertical plates extending in the vertical direction, spanning over the entire height in the vertical direction of the port set, and arranged facing each other in the horizontal direction and spaced from each other by a distance corresponding to a width in the horizontal direction of the ports,
• wherein the vertical unit includes a plurality of horizontal plates extending in the horizontal direction, arranged between the vertical plates, and arranged facing each other in the vertical direction, and wherein one of the horizontal plates separates the first port and the second port from each other and includes a through-opening connecting the first port and the second port, and
• wherein in the vertical unit, the plurality of ports included in the port set are defined by the two vertical plates and the plurality of horizontal plates.

A cage assembly comprising:

• a cage configured to be attached to a first face of an external board and accommodate a plurality of external devices inserted into the cage along a depth direction substantially orthogonal to the first face, wherein a direction orthogonal to the depth direction is defined as a vertical direction, and a direction orthogonal to the depth direction and the vertical direction is defined as a horizontal direction,
• the cage comprising:
• at least one vertical unit, wherein the vertical unit defines a port set in which a plurality of ports as spaces accommodating the external devices are aligned in a line in the vertical direction,
• wherein the vertical unit includes two vertical plates extending in the vertical direction, spanning over the entire height in the vertical direction of the port set, and arranged facing each other in the horizontal direction and spaced from each other by a distance corresponding to a width in the horizontal direction of the ports,
• wherein each vertical plate includes a press-fit pin protruding in the depth direction from a rear edge of the vertical plate facing the external board, the press-fit pin being configured to be press-fitted to the external board,
• wherein the vertical unit including a plurality of horizontal plates extending in the horizontal direction, arranged between the vertical plates, and arranged facing each other in the vertical direction, and
• wherein in the vertical unit, the plurality of ports included in the port set are defined by the two vertical plates and the plurality of horizontal plates;
• and
• a circuit board as the external board,
• wherein the circuit board includes a plurality of ventilation openings, and a plurality of through-holes,
• wherein the plurality of ventilation openings are openings penetrating through between the first face of the circuit board and a second face corresponding to a back face of the first face,
• wherein the plurality of ventilation openings being arranged so as to each correspond to a position of each of the ports, and being aligned in a line with a spacing from each other in the horizontal direction,
• wherein the plurality of through-holes each are a hole into which the press-fit pin of each of the vertical plates is press-fitted, and
• wherein the plurality of through-holes being arranged between the ventilation openings in the horizontal direction.