DELTA Cat 3 modular jack socket, carbon metallic finish. Functionally identical to the aluminum metallic variant (5TG9874-1AM) — single RJ11 6/4 port, Cat 3, integrated dust shutter, 1-fold insert. The only difference is the color of the visible frame surrounding the jack opening.

Carbon metallic: when does this color make sense?

Carbon metallic is a dark anthracite-grey with a subtle warm undertone — not a cold black. It is designed to match Siemens' darker DELTA cover frame ranges: DELTA profil in anthracite, DELTA style in dark grey or black, and DELTA line in grey. In a room with dark switch frames, a silver or white telecom insert stands out awkwardly; carbon metallic blends in. For buildings where the electrical design specification calls for dark-colored accessories throughout, carbon metallic is the correct SKU — specifying aluminum metallic would create a visible mismatch at every phone point.

Does the shutter color match the frame?

The shutter and the visible ring around the jack are both in the specified metallic finish. When the plug is inserted, the open shutter is hidden behind the plug body. When the socket is empty, the closed shutter presents a clean metallic face — no visible plastic, no dust opening. The shutter itself is the cosmetic surface.

How does a 1-fold insert differ from a full junction box insert like 5TG2417?

A 1-fold insert is narrower — it occupies exactly half the width of a standard DELTA module carrier. Two 1-fold inserts (e.g., this telecom socket + a blank insert) share one module carrier. A full junction box insert like 5TG2417 occupies the entire carrier alone. The 1-fold format is ideal for telecom-only locations where you want to maximize module-carrier utilization: phone + antenna, phone + blank, phone + RJ45 data.