The Avenue router occupies from one to three slots in any Avenue 3RU frame. The router is comprised of three different modules: the 9430 8×2 router module, the 9435 clean switch sub module, and the 9440 ten port expansion module. Power (redundant option available), video reference, and an interface to the Avenue control system is provided by the frame.

While the dimensions of the base 9430 router module are fixed at 8 inputs by 2 outputs, the 9440 module provides ten additional ports, each of which is individually user configurable as either an input or an output. Up to two 9440 expansion modules may be added to the base 9430 module. A 9430 plus a single 9440 supports a total of 11 different configurations ranging in size from 18×2 to 8×12. A 9430 plus two 9440 modules supports a total of 21 different configurations from 28×2 to 8×22.