The ASMi-52 SHDSL multiplexer and ASMi-52L SHDSL modem transmit E1, Ethernet or serial data streams on an SHDSL link at various data rates of up to 4.6 Mbps.
ASMi-52 is an SHDSL modem/multiplexer that operates in full-duplex mode over the 2- and 4-wire copper lines.
Multiple data rates in the range of 64 to 4608 kbps are supported. The data rates depend on the line interface, DTE interface type, and operating clock modes.
ASMi-52 employs standard SHDSL TC-PAM technology to extend the transmission range (see Table 1), thus enabling carriers to reach more customers at lower costs.
The following DTE interfaces are available: X.21, V.35, RS-530, and G.703/G.704 E1 or T1. For LAN-to-LAN connectivity the modem features a built-in 10/100BaseT bridge Ethernet port with VLAN functionality.
When equipped with two interfaces, the standalone ASMi-52 units combine and multiplex user traffic over the SHDSL link. The following DTE combinations are available:
• Serial Port (V.35, X.21, RS-530) + LAN
• E1 + LAN
• E1 + serial port (V.35, X.21, RS-530).
Note: T1 multiplexer units are not available.
Note: In ASMi-52 with E1+V.35 combination the ETH port can be used for management only.
4-wire line interface modems can be configured to operate over 2-wire lines.
ASMi-52 uses an Embedded Operation Channel (EOC) for remote unit control and monitoring.
EOC functions without interfering with data transmission, using the SHDSL overhead bits in compliance with the ITU-T G.991.2 requirements.
ASMi-52 units can operate with centrally located LRS-102 racks with ASMi-54C/N modules, DXC-8R/10A/30 chassis with D4SL/D8SL modules, MP-2100/2104 chassis with MSL-8 modules or MP-4100 chassis with the M8SL or ASMi-54C/N modules.
User-configurable low-speed mode is available for units with serial and LAN interfaces. In this mode ASMi-52 operates at 64/128 kbps (2-wire) and 128/256 kbps (4-wire) data rates when working with devices with E1 DTE interface.
The maximum data rate in low-speed mode is 2048 kbps. Up to eight SHDSL repeaters can be installed in line to increase the operation range of E1 based modems. ASMi-52 provides basic management of the repeaters.
