Three related surfaces cover the physical and logical assets: subscriber equipment, network inventory, and stock.
A customer’s router — the Connection & device card on their Equipment tab — is described for providers in Installs & equipment.

Network inventory (NetBox)

The canonical device and IP-address inventory, backed by NetBox.
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Open IP & DCIM

Go to Network → IP & DCIM for the NetBox-backed view of network devices, IP addresses, DHCP leases, and cables — including address assignments.
IP & DCIM inventory

NetBox-backed inventory

Stock & fulfillment

Track hardware you hold and ship for installs.
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Open Stock & Fulfillment

From Network → Equipment, use the Restock / Restock · Allocate links (they open the stock page at /inventory-mgmt) to manage on-hand hardware stock and the fulfillment of equipment to installs — so a pending install isn’t scheduled before its kit is available.
Stock and fulfillment

Stock & fulfillment

Stock feeds Installs & field service — a job needs its hardware before it can go out.