Sheet N-303-EN: Calculated MMS4X00-NS uplinks from far-end unit CU-15, and the tray drops onto the cabinet tops

What this sheet shows

N-303-EN is the far-end unit detail, drawn at 1:50. The line under the top border names the unit and the two views: Far-end unit CU-15 (NETA-CU15, R085–R090, NETB-CU15): plan (upper) and X–Z elevation (lower). Fibre drops from the trays onto the cabinet tops. Dimensions in mm. The plan's cabinet row is R083, R084, NETB-CU14, NETA-CU15, R085, R086, R087, R088, R089, R090 and NETB-CU15. The header's parentheses name NETA-CU15, R085–R090 and NETB-CU15. R083, R084 and NETB-CU14 are printed on that row to the left of NETA-CU15. CDU-14B, CDU-15A and CDU-15B are drawn on the TB side of the row. Dashed lines are labeled TA above the cabinets, TL along the row and TB on the CDU side. The lower view repeats that row: R083, R084, NETB-CU14, NETA-CU15, R085, R086, R087, R088, R089, R090 and NETB-CU15, with a graphic scale marked 0 to 2 m at 1:50. The detail is part of the GPU hall reference.

Uplinks from the far-end unit cabinets

The table at the upper right is titled Uplinks from the far-end unit cabinets. The columns are From, To, Links, Module, Longest calculated m and Panels. Module is MMS4X00-NS on every row, and Panels is 1 on every row. From NETA-CU15 the rows are CVS-A, 56 links, longest calculated 61.40 m; SPA-1, 144 links, 60.33 m; SPA-2, 144 links, 59.53 m; and SPA-3, 144 links, 58.73 m. From NETB-CU15 the rows are CVS-B, 56 links, 58.95 m; SPB-1, 144 links, 61.08 m; SPB-2, 144 links, 60.28 m; and SPB-3, 144 links, 59.48 m. The CVS destination on each side is the 56-link row. Each SPA row and each SPB row is 144 links. Reading down the SPA rows, the longest-calculated values are 60.33 m, then 59.53 m, then 58.73 m. Reading down the SPB rows, they are 61.08 m, then 60.28 m, then 59.48 m. Among the eight values, 61.40 m on NETA-CU15 to CVS-A is the largest, and 58.73 m on NETA-CU15 to SPA-3 is the smallest. Note 4 states these far-end uplink channels as calculated routed lengths of 58.7–61.4 m (reference layout model, DESIGN; not installed measurements) and names the module MMS4X00-NS (OS2 single-mode, 100 m stated with two patch panels). The note says the values come from the reference port table. The Panels column is the cell that prints 1. The module statement in the same note is the line that says 100 m stated with two patch panels. NETA-CU15 is the From cabinet for CVS-A, SPA-1, SPA-2 and SPA-3. NETB-CU15 is the From cabinet for CVS-B, SPB-1, SPB-2 and SPB-3.

Drops, elevations, and the open check

Note 1 separates the two drops onto the cabinet top. NIC/DPU jumpers leave TL (bottom Z3550) and enter the cabinet top through a 128 mm drop. Leaf/spine trunks leave TA (plane A) or TB (plane B) at bottom Z3900 and enter at the cabinet top rear. Trunk bend radius is at least 10 × OD, and the note's example is a 13 mm trunk → ≥130 mm. The elevation draws TA and TB as one band. The caption states that TA (/) and TB (\) both run bottom Z3900–top Z4100 and coincide in X–Z projection, with Y positions on the plan and on sections. TL is labeled bottom Z3550, top Z3650. The elevation dimensions 128 from the cabinet top at Z3422 up to the TL bottom, and 478 from that cabinet top up to the TA/TB bottom at Z3900. The view draws drops from the tray bands down to the cabinet tops, and it draws the longer drops from the TA/TB band to NETA-CU15 and to NETB-CU15. Note 2 places the cabinet: height 2294 mm stands on the IT support rails (top Z1128), and the cabinet top is at absolute elevation Z3422. The elevation also dimensions 98 from floor-board top Z1030 up to the cabinet base and labels the cabinet body 2294. Z1128 plus that 2294 mm cabinet height is the stated top Z3422, and Z1030 plus the drawn 98 is Z1128. Z3422 plus 128 is the TL bottom Z3550, and Z3422 plus 478 is the TA/TB bottom Z3900. Note 3 is the open item overhead: clear height from the cabinet top to the roof main-beam underside (about Z6700) exceeds 3 m, and the tray hangers bear on roof purlins. Hanger and purlin capacity is marked CONFIRM, structural engineer.

Status

The title block dates the sheet 2026-10-05 and issues it as Public Edition P2, number N-303-EN, sheet 15 of 30, scale 1:50, units mm. The sheet title is Far-end unit CU-15 detail: plan and X–Z elevation. The status line reads: reference design for study and evaluation — not for construction. Note 4 marks the uplink lengths as calculated routed lengths of the reference layout model (DESIGN), not installed measurements, taken from the reference port table. It states the range 58.7–61.4 m and the module MMS4X00-NS, OS2 single-mode, 100 m stated with two patch panels. Note 3 leaves hanger and purlin capacity as CONFIRM for the structural engineer. The drawing is part of the Public Edition P2 network reference design.

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