A telecommunications assembly comprising: a chassis adapted for connection to a rack; a tray assembly that removably mounts in the chassis, the tray assembly including: a tray; a cable spool rotatably mounted to the tray; a plurality of adapters mounted to the tray; wherein the tray assembly can be inserted into and removed from the chassis as a unit without requiring the cable spool or the plurality of adapters to be detached from the tray, the tray carrying the cable spool and the plurality of adapters during insertion and removal; wherein the plurality of adapters are fiber optic adapters that are carried by the cable spool when the cable spool is rotated relative to the tray, wherein the telecommunications assembly also includes a fiber optic cable assembly, the fiber optic cable assembly including a main cable portion that is spooled about the cable spool, the main cable portion including a jacket containing a plurality of optical fibers, the fiber optic cable assembly also including a broken-out portion where the plurality of optical fibers are broken-out from the jacket and incorporated into separate pigtails having connectorized ends received within the fiber optic adapters, the connectorized pigtails extending at least partially along a fiber routing path that extends along a top side of a base panel of the tray from the cable spool to the fiber optic adapters; and wherein the cable spool rotates relative to the tray when the main cable portion of the fiber optic cable assembly is paid out from the cable spool; characterized in that the plurality of adapters is mounted to an adapter module that is disposed on an outer surface of a flange of the cable spool, and wherein the adapter module is adapted to slide relative to the cable spool between an extended position and a retracted position. a chassis adapted for connection to a rack; a tray assembly that removably mounts in the chassis, the tray assembly including: a tray; a cable spool rotatably mounted to the tray; a plurality of adapters mounted to the tray; wherein the tray assembly can be inserted into and removed from the chassis as a unit without requiring the cable spool or the plurality of adapters to be detached from the tray, the tray carrying the cable spool and the plurality of adapters during insertion and removal; wherein the plurality of adapters are fiber optic adapters that are carried by the cable spool when the cable spool is rotated relative to the tray, wherein the telecommunications assembly also includes a fiber optic cable assembly, the fiber optic cable assembly including a main cable portion that is spooled about the cable spool, the main cable portion including a jacket containing a plurality of optical fibers, the fiber optic cable assembly also including a broken-out portion where the plurality of optical fibers are broken-out from the jacket and incorporated into separate pigtails having connectorized ends received within the fiber optic adapters, the connectorized pigtails extending at least partially along a fiber routing path that extends along a top side of a base panel of the tray from the cable spool to the fiber optic adapters; and wherein the cable spool rotates relative to the tray when the main cable portion of the fiber optic cable assembly is paid out from the cable spool; characterized in that the plurality of adapters is mounted to an adapter module that is disposed on an outer surface of a flange of the cable spool, and wherein the adapter module is adapted to slide relative to the cable spool between an extended position and a retracted position. a tray; a cable spool rotatably mounted to the tray; a plurality of adapters mounted to the tray; wherein the tray assembly can be inserted into and removed from the chassis as a unit without requiring the cable spool or the plurality of adapters to be detached from the tray, the tray carrying the cable spool and the plurality of adapters during insertion and removal; wherein the plurality of adapters are fiber optic adapters that are carried by the cable spool when the cable spool is rotated relative to the tray, wherein the telecommunications assembly also includes a fiber optic cable assembly, the fiber optic cable assembly including a main cable portion that is spooled about the cable spool, the main cable portion including a jacket containing a plurality of optical fibers, the fiber optic cable assembly also including a broken-out portion where the plurality of optical fibers are broken-out from the jacket and incorporated into separate pigtails having connectorized ends received within the fiber optic adapters, the connectorized pigtails extending at least partially along a fiber routing path that extends along a top side of a base panel of the tray from the cable spool to the fiber optic adapters; and wherein the cable spool rotates relative to the tray when the main cable portion of the fiber optic cable assembly is paid out from the cable spool; characterized in that the plurality of adapters is mounted to an adapter module that is disposed on an outer surface of a flange of the cable spool, and wherein the adapter module is adapted to slide relative to the cable spool between an extended position and a retracted position.