English to Spanish Tech/Engineering Electronics / Elect Eng fibra óptica

Otra duda procedente del mismo texto:

With conventional optical fibre cables, it’s not possible to tell where the reverse point of the SZ stranding is. This makes life unnecessarily difficult and expensive for network operators because when you want to make a mid-span access on an SZ-stranded cable, the cut in the sheath must be long enough to ensure that there’s a **full lay reverse** visible.

Muchas gracias,
Maria