• High-density cardnest family for Telindus access equipment.
• equipment Up to 60 modems in one cardnest.
• All cards hot swappable.
• 19" Rack-mountable and desktop versions available.
• -48Vdc or 230/115Vac powering with optional redundancy.
• All connections (lines,power and interfaces) on the optional rack cabling.

Cardnest CN4

The 19" rack-mountable system (Cardnest CN4) is equipped with 15 card-slots, 30 interface-slots and 2 power –slots. It provide a high- density solution for the Telindus access equipment with densities of up to 30 or 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 interface-slots 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 controller card cab be mounted in the chassis. Since the high-speed management bus cab 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 redunduncy and to generate the required alarms to the management system should one 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 rackmountable 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/ 2slots) is a compact low-cost system with 2 card-slots, 4 interface slots, and an integrated power supply.

All CN4 system are designed to be directly powered at –48 Vdc. In his case np power module is required (no CN4 power slots are used). –48 Vdc is directly routed to each card in the system. This approach has advantages in reducing the cost of investment, and offers full implicit redundancy for the powering of the equipment. Additionally the system increases the MTBF value of the global system, since there won’t be any ‘hot-spots’ caused by the powermodule.

When the Cardnest CN4 or 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. Different power versions of those power modules do exist adapted to the different equipment that can be used on the CN4.

If –48 Vdc is used as normal power source,backup may be provided by inserting one or tow 230/115 Vac power modules. Only in case of –48 Vdc power source fail, the 230/115 Vac back-up power source will take over (swiching).

TECHNICAL SPECIFICATIONS	Cardnest CN4	Desktop CN4/4 slots	Desktop CN4/4 slots
CN4 family overview
Height	6u (270 mm)	6u (270 mm)	82 mm
Width	19"(482 mm)	170 mm	353mm
Depth	350 mm	350 mm	325mm
Weight (empty)	6.1 kg	4.5 Kg	3.2 kg
Number of card-slots	15	4	2
Number of interface-slots	30	8	4
Number of line pairs/card-slots	4	4	4
Direct +-48 Vdc powering	Yes	yes	yes
Integreated 230/115 Vac power supply	No	no	yes
Number of 230/115 Vac power spots	2	2	-
48 Vdc connector	Screw	Screw	Screw
230/115 Vac connector	IEC	IEC	IEC
Line connectors	Screw	Screw	Screw
Local alarm contacts	2x RJ45	2x RJ45	no
High-speeed management connectors	2x RJ45	2x RJ45	no
Station clock input	RJ45	RJ45	no