The DAS-3224/3248 IP DSLAMs are advanced CO devices with the capability to interface directly with evolving IP networks in a cost effective manner. The Gigabit Ethernet (GE) Network uplink interfaces on these IP DSLAMs directly connect to an Internet router or LAN switch.

These IP-based DSLAMs can be used by service providers to offer broadband multi-service features on the last mile access network via a copper based local loop. They offer ADSL, ADSL2, and ADSL2+ interfaces and deliver advanced IP services that include QoS, multicast, and subscriber management. These service features eliminate congestion of the bandwidth available to users to deliver smooth, easy and efficient passage of video, voice and data packets across the networks. This is know as “Triple Play” and allows for the provisioning of bandwidth-intensive and lesser bandwidth-intensive services at the same time. The DAS-3224/3248 series also supports network uplink aggregation, enabling the operator to combine both of the GE uplink interfaces into a single logical interface and thus extending the transmission bandwidth. Daisy Chaining is an another option, when implemented all units share a single GE uplink. Furthermore, Service Demarcation provides a way to separate traffic by assigning different VLAN IDs.

With the DAS-3224/3248 series, Relay Agent Information (DHCP Option 82) can be used by servers in order to implement IP address or other parameter assignment policies. The DAS-3224/3248 series offers MAC Limiting and MAC Filtering through its MAC Layer Service. The series also uses Single End Loop Testing (SELT) for proactive loop pre-qualification. Line quality is continuously verified while line length, line capacity and line termination are measured. Dual End Loop Testing (DELT) is primarily used for reactive tests on a loop after a modem has been deployed. This feature renders troubleshooting on lines with bad performance possible. Operation Management and Maintenance (OAM) is implemented for supervision, testing and performance monitoring. OAM loop-back cells are used to verify the integrity of a virtual path or virtual circuit between different nodes in an ATM network.

The DAS-3224/3248 series comes with a GUI management software. This software provides web-management features including real-time status monitoring. The IP DSLAMs also support Network Management System monitoring and administration tasks.

For Quality of Service, the DAS-3224 and DAS-3248 support IEEE 802.1p with 8 priority queues and DiffServ, a networking architecture that defines a simple, scalable and coarse-grained mechanism for classifying and managing network traffic. DiffServ is used to provide low-latency, guaranteed service (GS) such as voice or video, while providing best-effort traffic guarantees to non-critical services including web traffic or file transfers. Pack classification is based on MAC/IP addresses and TCP/UDP port numbers.

The DAS-3224/3248 IP DSLAMs are enclosed in 1.2U sized metal cases and can be used as desktop units or mounted on a standard equipment rack. They can be fitted in 19-inch and 23-inch racks using the optional rack mount-kit.

The DAS-3224 IP DSLAM comes with 24 ADSL subscriber ports and 2 combo interfaces (10/100/1000 Base-T or mini-GBIC optical interface). The DAS-3248 IP DSLAM comes with 48 ADSL subscriber ports and 2 combo interfaces.

Using any of the uplink types, it is possible to stack these IP DSLAM units and aggregate multiple units over a common network connection.

The rich features of the DAS-3224/3248 IP DSLAMs make them most economical and suitable solution for next generation broadband access platforms.