One Vertical Ring

In an MDF (Main Distribution Frame) setup, the One Vertical Ring refers to the vertical main incoming line, which brings external telephone lines or trunk lines into the system.

The L Frame is the metal mounting frame used to hold and support the Krone/LSA IDC punch-down blocks.

Function Together:

• One Vertical Ring brings in the incoming trunk/external lines
• L Frame provides the structure and mounting slots for distributing these lines through punch-down modules