opposite front surface of the panel 22 a further set of holding rings e g 35 is provided for containing the jumper fibers 15 it will be noted that the holding rings and panel are all mounted to the bottom surface of the tray again it will be appreciated that only a few fibers are shown for clarity in the illustration also while the cable is shown as entering from the top of the shelf through the rear it can also enter from the bottom and through apertures in the front e g 36 the cable 12 is held in position by standard tie wrap supports not shown in accordance with an important feature of the invention the tray 20 pivots downward approximately 90 degrees once it reaches its fully retracted position as illustrated in fig3 this gives the craftsperson easy access to the connectors and fibers to the rear of the panel 22 when it is desired for example to clean a connector or connect additional fibers from the cable 12 it also permits the jumper fibers to exit through the front apertures on either side of the shelf the particular means employed for this pull out and pivot feature is best seen in fig3 and 4 the latter figure illustrating only the rearward member 41 as it is mounted on the bottom of the shelf as previously mentioned the members 40 and 41 are slidably mounted on the rails 25 and 26 of the shelf the panel 22 and fiber rings 27 35 are all mounted on the forward member 40 in particular the rings 27 28 31 and 32 are mounted to a plate 42 which is in turn mounted.