The family is constituted of one 19’’ rackmountable device and two desktop units. The 19’’ rack-mountable system (Cardnest CN4) is equipped with 15 card-slots, 30 interface-slots and 2 power-slots. It provides a high-density solution for the OneAccess equipment with densities of up to 30 to 60 modems in one nest (depending on the modem type). Interface plug-in modules (maximum two per card-slot position) are plugged into the available interfaceslots on the back of the CN4. A high-speed management bus permits the management of all the equipment installed in the CN4. For this purpose an Orchid controller card can be mounted in the chassis. Since the high-speed management bus can be cascaded over several cardnests, one single controller card can control up to seven cardnests and all the remotely connected equipment. The CN4 cardnest is designed to provide full power redundancy and to generate the required alarms to the management system should one of the power sources fail. The cardnest is also equipped with an output for local alarm generation.

The first desktop system (Desktop CN4/4 slots) offers the same features as the rack-mountable system. However it comes as a compact desktop unit with 4 card-slots, 8 interface-slots and 2 power-slots.

The second desktop system (Desktop CN4/2 slots) is a compact low-cost system with 2 card-slots, 4 interface slots, and an integrated dual power supply.

All CN4 systems are designed to be directly powered at -48 Vdc. In this case no additional power module is required (no CN4 power slots are used). -48 Vdc is directly routed to each card in the system. When the Cardnest CN4 of the Desktop CN4/4 slots is powered at 230/115 Vac, one or two 230/115 Vac power modules may be inserted in the available power slots. These power modules can work in full power redundancy and allow hot swapping in case of power problems.