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RAD Data Communications has launched a SHDSLbis modem with integrated router capabilities designed for incumbent and alternative carriers and providers of business services to enterprise customers.

The modem incorporates a separate E1 uplink.

The ASMi-54L with integrated router can operate as a central office device or as customer premises equipment (CPE) according to user configuration.

The built-in router incorporates various tools for secure and efficient Layer-3 IP connectivity over packet-switched networks.

These include Network Address Translation (NAT) to map a private single host IP address on the LAN to a single public IP address on the WAN; and static Network Port Translation (NAPT) to map multiple LAN IP addresses to a single public IP address.

The ASMi-54L router incorporates Quality of Service (QoS) attributes that provide different priorities to different services.

In addition, the firewall, an integrated collection of security measures designed to prevent unauthorised electronic access to a networked computer system, handles DoS and DDoS attacks and supports stateful firewall.

A VPN can be created using several methods on different layers.

One is by using IPsec on the network layer.

IPsec supports up to 10VPNs (or IPsec tunnels) and has three major protocols (AH, ESP and IKE), which secure and isolate its user from other users employing the same private network.

Apart from routing capabilities over two-/four-wire lines at data rates of up to 5.7/11.4Mbps (2.6km over 26 gage at 5.7Mbps), the modem offers the option to provide point-to-point Ethernet and E1 service extension at rates of up to 22.8Mbps using Ethernet in the First Mile (EFM) bonding.

EFM bonding on the Ethernet interface ensures that a failure or addition of a link does not drop the traffic being transmitted over the other wires in the group.

The capacity of the group does not decrease when a new link is added at a lower rate.

The ASMi-54L with integrated router also performs bridging functions by implementing IEEE 802.1q standards, which provide VLAN-tagging with four levels of prioritisation.

This enables carriers to offer differentiated Ethernet services.

VLAN tagging can also be employed for separating traffic, ensuring transparency of the customer traffic and bolstering security of management traffic.

The user can activate or deactivate the priority mechanism, and each priority (VLAN priority, DSCP or per port) can be mapped to one of four priority queues.

In addition, 802.1p, DSCP, and per port priority schemes allow users to define different QoS levels according to application requirements.

RAD Data Communications

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