Cabling is generally IBM "Type-1" shielded twisted pair, with unique hermaphroditic connectors, commonly referred to as IBM data connectors in formal writing or colloquially as Boy George connectors.
Der Ring des Nibelungen | Ring of Honor | The Fellowship of the Ring | The Ring (magazine) | Ring of Fire | The Ring | Ring | The Lord of the Rings: The Fellowship of the Ring | ''The Ring'' | Bull Ring, Birmingham | The Promise Ring | Ring 2 | Twin Ring Motegi | Ring Round the Moon | E-Ring | Bull Ring | Sheffield Inner Ring Road | Scarff ring | Ring of Fire (song) | Ring Lardner | One Ring | Ku-ring-gai Council | World Series ring | Tub Ring | St Martin in the Bull Ring | Ring of Bright Water | Ring ni Kakero | Ring (film) | ring | Outer Ring Road, Hyderabad |
The Cisco 2500 series routers are a series of 19" rack mount access routers typically used to connect Ethernet or token ring networks via ISDN or leased serial connections (i.e. Frame Relay, T1 etc.).