Panel with male & female
25-pair connectors
& 25 RJ11 jacks

This model is very useful. Because it has two 25-pair Amphenol-type connectors, you can leave it connected between a phone company demark and a phone system or punchdown block, and still have easy-to-use modular connecors for testing or connecting single-line devices.

It's also used for distributing phone lines to temporary phones in phone banks for political campaigns, and fund raising for charities and public broadcasting. You can easily chain several together with connectorized cables, and break out lines wherever needed.

Built with 25 1-pair (RJ11) jacks connected to two bridged 25-pair connectors (one male and one female) in standard T-R sequence for series connection.