SHDSL.bis Modem

• Four-port 10/100BaseT interface with integrated switch
• Optional E1 interface
• Standards-compliant SHDSL, including ITU-T G.991.2 and ETSI 101524
• TC-PAM 16 or TC-PAM 32 line coding
• EFM (Ethernet in the First Mile) bonding per IEEE 802.3-2005; M-Pair bonding for HDLC per G.991.2
• Ethernet OAM per IEEE 802.3-2005 (formerly 802.3ah)
• Ethernet rate limitation per port
• Ethernet switching and bridging capabilities; VLAN prioritization and Ethernet QoS support
• Managed via SNMP, Telnet and ASCII terminal
• EOC (Embedded Operational Channel) management for repeater deployments
• Compact, half 19-inch plastic enclosure
• Fully interoperable with the ASMi-54 SHDSL.bis modem and the LRS-102 central copper mux rack

• Maximizes bandwidth utilization of existing copper infrastructure with SHDSL.bis and EFM capabilities
• Reduces network equipment costs with multi-service Ethernet and E1 support
• Simplifies network operations and increases service reliability with a wide range of management options
• Reliable performance over poor quality or noisy lines
• Supports service provider QoS
• Dual-purpose device supporting CO or CPE configurations

The ASMi-54L SHDSL.bis modem is a cost-effective, managed device for extending E1 and
Fast Ethernet services over multi-pair bonded copper links. Ensuring reliable performance over poor quality or noisy lines, the ASMi-54L provides access rates of up to 11.4 Mbps over 4-wire connections or 15 Mbps over 2-wire. The device can achieve an extended service range of up to 2.6 km (1.825 miles) for each 5.7 Mbps pair at 26 AWG.

Ethernet capabilities and QoS support

Featuring a built-in Ethernet switch, the ASMi-54L SHDSL.bis modem includes up to four 10/100BaseT user ports and supports VLAN-aware 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. 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.

Ethernet Link OAM (operations, administration and maintenance) support enables easy monitoring of network operations over SHDSL lines with quick fault detection with discovery, connectivity check and link fault propagation features. In addition, per-port rate limitation capabilities to allow better control of ingress Ethernet traffic.

Management options

The ASMi-54Lsupports the following management connections for configuration, monitoring and diagnostics:

• Local RS-232 terminal
• Telnet server, SNMP (ver.1)
• RADview-EMS Web server
• Network links for Inband management with a dedicated VLAN