Apart from a fi xed 100 Base-T backbone connection, the 2400 Series can accept various modular interfaces with support for PPP, Frame Relay or ATM.

These interfaces include

• Multiple E1 (up to 8) with support for IMA (Inverse Multiplexing over ATM), multi-link PPP or multi link Frame Relay. The number of E1 lines and the encapsulation scheme effectively used can be selected by confi guration (e.g. 4x E1 IMA)
• E3 with support for ATM, PPP and Frame Relay
• STM1 with support for ATM
• 10/100 Base-T Ethernet interface with built-in 4 port switch

Fully supported by the TDRE (Total Dynamic Routing Engine), the 2400 Operating System supports ATM switching, full IP-routing, bridging and VLAN switching. The ports of the unit can be split into multiple bridge groups, enabling direct mappings between DSL lines and VLANs. In addition is has an extended support for IP CoS (Class of Service) and it can handle multi-cast applications. Therefore, the 2400 Series can be used for supporting services like VoIP (Voice over IP) and digital video multi-cast.

The integrated possibility to terminate PPPoA and PPPoE sessions, together with the built-in Radius client functionality allow for the Authentication, Authorisation, and Accounting (AAA) of end-users, without the need for installing a separate BRAS (Broadband Access Server) or router.

The unit comes with an advanced built-in management agent and is supported by the complete TMA management suite for local and remote control. The existing backbone infrastructure (IP, ATM or Frame relay) can be used to transport all management information to a central location without the need for a separate overlay network.

The 2400 access concentrator houses 8 SHDSL or 24 ADSL or SHDSL modems. Two SHDSL circuits can also be combined to increase the distance or speed towards the end-users. The 2400 series comes in a very compact size (1 unit high) and can be used as desktop unit or can be rack-mounted through the optional rack-mount-kit. It fi ts in 30 cm deep ETSI racks with all connectors and indicators on the front. Combined with its low power consumption it is easily stackable.

Typical applications include low density rollout of businessoriented series over DSL, especially when specifi c IP oriented features are required or a great fl exibility is needed. Several units can be cascaded over the Ethernet ports to a single WAN uplink.