Receivers: Barrel/Endcap summing
Some cables are required between Barrel and Endcap receivers for summing across the transition. The lengths will be either 1m (in the same rack) or about 5m (via underfloor cable tray between racks). If the summing is from Barrel to Endcap this may be within the latency difference between them.
Mergers to CTP
Route is down through the floor. Approximate length 5m down and 12*0.7m across, say 14m for furthest merger, maybe 12.5m for nearest merger. (CTP and TTC are now quite off centre).
Glinks to RODs
If RODs are placed centrally, cable lengths will be under 3m. If the RODs are at the edge, this rises to about 12m.
Likely minimum and maximum cable lengths
| Path: | Min | Max | Safe? | TDR |
| RX to PPM: | 4.2m | 8.9m | 5m | 10m |
| PPM to CPM/JEM: | 7.8m | 9.0m | 8m | 10/7.5m |
| Between CP Mergers: | 1.7m | 4.2m | 2m | 2.5m |
| Between JEP Mergers: | 1.0m | 1.0m | 1m | 2.5m |
| Mergers to CTP: | 12.5m | 14.0m | 13m | 2m? |
| CTP to TTC : | 5m | 5m | 5m | 8m? |
| Total cable: | 30.5m | 41.1m | 32m | 30m? |
| Total RX-CMM: | 13.7m | 22.1m | 14m | 20m? |
| Cable latency/ticks: | 6 | 8 | 6.5 | 6? |