ASMi-54, ASMi-54C, ASMi-54L, ASMi-54LRT
SHDSL.bis Modems with Integrated Router or Multiplexer



ASMi-54, 54C, 54L, 54LRT

The ASMi-54 product line includes a range of cost-effective, managed devices for extending E1 and mid-band Ethernet services over multipair bonded copper links. Ensuring reliable performance over poor quality or noisy lines, the ASMi-54 SHDSL.bis modem and ASMi-54C module operate in full duplex mode over 2-wire, 4-wire or 8-wire lines, achieving variable data rates of up to 22.8 Mbps. The ASMi-54L and ASMi-54LRT provide access rates of up to 11.4 Mbps over 4-wire connections. The devices can achieve an extended service range of up to 2.6 km (1.825 miles) for each 5.7 Mbps pair at 26 AWG. The ASMi-54 line is part of the AXCESS+ portfolio of multiservice access and First Mile solutions.

The ASMi-54 modems are ideal for carriers, service providers and mobile operators, as well as corporate, utilities and transportation companies looking for economical delivery of voice and broadband data traffic in point-topoint or hub and spoke communications. In addition, ASMi-54´s ruggedized design ensures reliable operation in industrial applications and harsh environments.

Alternatively, RAD's high performance SHDSL technology supports increased throughput for Ethernet services of 11.4 Mbps over 2-wire and up to 30 Mbps over 4-wire.

Ethernet capabilities and QoS support

Featuring a built-in Ethernet switch, the ASMi-54 SHDSL.bis modems include up to four 10/100BaseT user ports and support VLANaware and VLAN-unaware bridging. VLAN stacking (Q-in-Q) and stripping functionalities enable transparent traffic delivery over packet switched networks with optimal efficiency.

QoS (quality of service) levels are defined according to VLAN priority (802.1p), IP Precedence, DSCP, or per port, offering users flexibility in differentiating traffic handling depending on application requirements. Up to four priority queues are supported using Strict Priority (SP) scheduling.

Fault propagation enables the units to shut down the Ethernet user port when an SHDSL line failure is detected and to switch traffic to an alternate route. EFM bonding capabilities ensure that a failure or addition of a link does not drop the traffic being transmitted over the other wires in the group. Capacity is also maintained when a new link is added at a lower rate during Ethernet transmission.

IP routing functionalities

In addition to its Ethernet bridging attributes, the ASMi-54LRT incorporates a built-in router to allow secure and efficient Layer 3 IP connectivity over packet switched networks. The device enables port forwarding whereby packets are delivered according to a static NAT/PAT (network address translation/port address translation) table. This allows multiple LAN devices to share a single public IP address, so that outgoing traffic appears to originate from a single device – the ASMi-54LRT.

Solid Firewall™ protection for the LAN and WAN interfaces, as well as for the DMZ sub-network, provides security against unauthorized network access, including malicious denial of service (DoS) attacks. Protective measures include rate limiting for ingress packets of vulnerable types, stateful packet inspection (SPI) and service authorization, among others.

The ASMi-54LRT supports QoS differentiation for IP applications with four priority queues, Strict Priority scheduling and user-configurable classification according to DSCP values.

Features


• Point-to-point E1 and Fast Ethernet extension over multiple SHDSL.bis lines
• Standards-compliant SHDSL (ITU-T G.991.2 and ETSI 101524)
• Standards-compliant SHDSL (ITU-T G.991.2 and ETSI 101524)
• EFM (Ethernet in the First Mile) bonding per IEEE 802.3-2005; M-Pair bonding for HDLC per G.991.2
• TC-PAM 16 or TC-PAM 32 line coding
• Ethernet bridging and routing
• VLAN prioritization and Ethernet QoS support
• Daisy-chain or ring topology with STP support per IEEE 802.1D
• Managed via SNMP, Telnet and ASCII terminal
• Optional rail mountable metal enclosure for extreme temperatures (ASMi-54)

ASMi-54, ASMi-54C, ASMi-54L, ASMi-54LRTSHDSL.bis Modems with Integrated Router or Multiplexer

Ethernet capabilities and QoS support

IP routing functionalities

Features

ASMi-54, ASMi-54C, ASMi-54L, ASMi-54LRT
SHDSL.bis Modems with Integrated Router or Multiplexer