(discussion on Jan. 18, 2022 with claus, weaver, cpo)

Matt's proposal:
- timing on LC, but still handled by BOS
- networking might be on LC as well (unless 40Gb or 100Gb, which is natively MPO). NOT handled by BOS (also XTCAV point-to-point)
- pgp is on MPO and handled by the BOS

- detectors are all LC going to the BOS
- BOS-to-208-patch-panel is MPO (via breakout cable) and some LC as described above
- don't need breakout cables in SRCF according to Matt's proposal
- try to use the SFP-to-QSFP-adapters (LC to MPO) as much as possible in SRCF

order:

- bos has 320 pairs, but only half of these are used for SRCF, the other half goes to detectors (LC).  Implies 40 breakout cables with 4 fiber-pairs per MPO for room 208?
- 56 cmp, 11 eb, 19 mon nodes. currently only cmp have kcu's. maximum of 112 transceivers, but some should be sfp-to-qsfp. hsd's use lr4 (currently 12 channels in TMO and 4 channels in RIX). in feb. 2023 tmo needs 14 for hexanodes plus extra channels (spare and miscellaneous signals).  so guess 25 LR4. expect 36 in TMO eventually.  all others use plr4.  112-25 ~= 90 PLR4 max. Matt guess half will be sfp-to-qsfp.  So 45 PLR4, and 45 sfp-to-qsfp
- order our own patch fibers? (1 foot through 3m or 5m?)
- in short-term need to cable test detectors incrementally
- in long-term consider ripping out and having professionals do it (requires planning).  we do have a short window (2 or 3 weeks?) setup SRCF in advance using estimates of detector numbers. ideally so we can maintain it.
- need to figure out fiber swaps (tx/rx) and how we do it in a neat way. more complex with MPO.  Maybe BOS could do this?  We think not: monitoring might not work.  proposal: best place is from BOS→SRCFpatchpanel. indicate the swap by removing the plastic piece that holds tx/rx in place.

Sept. 2022 Cabling Proposal

100kHz data volumes:

- wave8: 8waveforms*256samples/sample*2bytes/sample*0.1MHz = 400MB/s
  need to add FEX data too
- piranha: 2048px*2bytes/px*0.1MHz=410MB/s
- hsd full wf: 60000samples*2bytes/sample*0.1MHz = 12GB/s
  max waveform length appears to be ~60000 samples looking at xtc2 file?
  FEX needs to reduce it to 4GB/s (3x)
- bld: 336bytes/event*0.1MHz = 33MB/s
  (from xtcreader -f /cds/data/psdm/prj/public01/xtc/tmoc00118-r0222-s008-c000.xtc2)
- timing: 309bytes/event*0.1MHz = 31MB/s

recabling proposal:
- tmo timing (including pvadet, bld)
- rix timing
- (4) tmo camlink nodes
- (2) rix camlink nodes
- tmo/rix fim node (5 fims)
- (2) rix hsd nodes
- (7) tmo hsd nodes
- peppex hsd node
- (2) tmo/rix ami
- (2) tmo/rix teb
- (2) tmo/rix mebuser

total of 25 nodes
5 spares