Lines and circuits
Specified for how many people will use them and what they will be doing, not for the headline speed.
Lines, failover and the network inside the building. Usually the longest lead time in any move, and the one most often left too late.

Connectivity is ordered months ahead and arrives when it arrives. It is the single most common reason an office move slips, and almost always because it was raised after the lease was signed.
We get it on the critical path early, and plan a fallback for the gap if the date moves.
Specified for how many people will use them and what they will be doing, not for the headline speed.
A second route that takes over automatically, which matters far more once the phones run over the same connection.
Switching, cabling and wireless that covers the whole floor rather than the half nearest the router.
Ordered against your actual date, with the supplier chased by us.
Thirty minutes with a senior engineer, then a written one-page summary you keep whether or not you work with us.