The 24-port breakout box is used in combination with a 25-pair RJ-21 (Amphenol) cable to interface 24 RJ-11 ports to Digium 24-port analog cards.
Also compatible with other devices using RJ-21 cables. For rackmounted installations, RJ-21 telco patch panels are also available.
Note: A 25-pair RJ-21 cable is needed to connect this to a Digium card, and is sold separately. For Digium 24-port cards and most other devices, this device requires a male to female RJ-21 cable, like the ones found in the Accessories tab.
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