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RAD ASMi-50 2/4-Wire MSDSL Modem

Call us for Pre-sales and discount pricing


  301-924-7400 Support

ASMi-450 HDSL High Speed Modem with Management

RAD ASMi-50 2/4-Wire MSDSL Modem
 

FEATURES
  • The ASMi-50, Synchronous Short Range Modem, operates in full duplex over 2 and 4-wire lines. Operation over 4-wire link provides 10% improvement in the maximum range of the modem. Data rates are user selectable between 64 kbps and 1152 kbps.
  • The modem employs MS-DSL 2B1Q technology to extend the transmission range (see Table 1 and Table 2) and provide efficient transmission, even over poor quality lines.
  • The modem uses an out-of-band management channel for controlling and monitoring the remote unit. Both data and management are transmitted over the same wires, simultaneously.
  • Menu-driven software, activated from the front panel, allows soft-select monitoring and adjusting of local and remote units. The software menus allow the user to monitor and control the following parameters:
    - Baud rate (when set to Internal or Receive mode)
    - Clock source
    - Output transmit level
    - Loop activation
    - Internal BER tester activation
    - LED status of local and remote units
    - Setting both local and remote units to default settings
    - Real time monitoring of link status
    - Real time alert of fault conditions
    - Real time signal quality monitoring.
  • The transmit clock is derived from three different selectable sources:
    - Internally from a built-in oscillator
    - Recovered from the received signal
    - From the digital interface (for tail-end applications).
  • When set to external mode, ASMi-50 automatically detects the clock rate coming from the digital interface and sets the remote unit to the same rate. When the digital interface rate is changed, both local and remote units follow the new rate and synchronize accordingly.
  • ASMi-50 supports a wide range of digital interfaces: V.24 (64 kbps), V.35, X.21, RS-530, V.36/RS-449 and G.703 Codirectional (64 kbps). In addition, an Ethernet/802.3 bridging option enables direct connections of an Ethernet LAN to both sides of the ASMi-50 link, saving the need for an external bridge.
  • The ASMi-50 system configuration is stored in non-volatile memory, minimizing system down-time when power is down or when a faulty remote unit is replaced.
  • The out-of-band management channel provides real time alerts for:
    - Disconnection of the digital data transmission
    - Disconnection of the management channel
    - Remote modem failure
    - Loop activation.
  • Real time indication of system status is provided on the front panel's LCD for the local and remote modems.
  • ASMi-50 is available as a standalone unit in both ASMi-50/M "Master" and ASMi-50/S "Slave" versions. The master version has a front panel LCD and control switches. The slave unit has a blank panel, which prevents unauthorized changes to link parameters. ASMi-50 is also available as a card for central solutions:
    - ASMi-50/R - card for the ASM-MN-214 19" modem rack
    - ASMi-50C - card for the LRS-12 19" modem rack with central SNMP management.
  • Management of the local and remote modems in the ASMi-50/S and ASMi-50/R card versions is carried out via a standalone Portable Control Unit (PCU) through a special 20-pin connector on the modem front panel. The PCU is ordered separately (see Ordering).
  • The ASMi-50C card for the LRS-12 rack can be managed from an ASCII terminal or via an SNMP UNIX station connected to the rack. RADview, an SNMP application, is available for managing the ASMi-50C cards and other RAD products. RADview enables management of a large number of links, system infrastructure, and presentation of statistical information on link availability. It is a user friendly system providing a graphical presentation of all network elements.
  • Diagnostic features include different loop activations, as well as an internal BER tester. The loops available are:
    - Local analog loopback
    - Local digital loopback
    - Remote digital loopback
    - Remote analog loopback.
    The loops can be activated from the front panel, PCU (Portable Control Unit) or from the digital interfaces that support loop activation signals

SPECIFICATIONS

  • Extends range of data transmission over 2 and 4-wire lines up to 22 km
  • Wide range of data rates between 64 and 1152 kbps
  • MS-DSL 2B1Q technology for extended range and improved performance
  • Variety of digital interfaces:
    - V.24 (64 kbps)
    - V.35
    - X.21
    - RS-530
    - V.36/RS-449
    - Ethernet (built-in bridge)
    - G.703 Codirectional (64 kbps)
  • Automatic rate detection in external clock mode for tail-end applications
  • Configuration and monitoring of local and remote units from front panel
  • Card version available for ASM-MN-214 19" modem rack and LRS-12 19" modem rack with central SNMP management

     

ASMi-50/M/*/#
Extended Range Modem (Master), stand-alone unit

ASMi-50/S/*/#
Extended Range Modem (Slave), stand-alone unit

ASMi-50/R/#
Card for the ASM-MN-214 19" rack

ASMi-50CF/#
Card for the LRS-12 19" rack - ETSI version

ASMi-50CB/#
Card for the LRS-12 19" rack - ANSI version

CIA/&
Adapter for 25-pin, D-type to V.35 or X.21 connector for ASM-MN-214 racks for two adjacent cards

* Specify power supply:
115 for 115 VAC
230 for 230 VAC
48 for -48 VDC
24 for 24 VDC
# Specify digital interface:
V24 for V.24
V35 for V.35
V35A for V.35 with DB-25 connector
V36 for V.36/RS-449
530 for RS-530
X21 for X.21
703/TB for G.703 Codirectional with terminal block (standalone option)
703/RJ for G.703 Codirectional with RJ-45 connector (standalone option)
703 for G.703 Codirectional with RJ-45 connection (ASM-MN-214 and LRS-12 versions)
UTP for built-in Ethernet/802.3 bridge with RJ-45 connector BNC for built-in Ethernet/802.3 bridge with BNC connector (available in standalone only)
 
& Specify connector:
V35 for V.35 connector
X21 for X.21 connector

PCU
Portable Control Unit with protective casing


ORDERING INFO

ASMI-50-1/CB/V35                        
ASMI-50-1/CDB/UTP                       
ASMI-50-1/CDB/V35                       
ASMI-50-1/M/115/530                     
ASMI-50-1/M/115/UTP                     
ASMI-50-1/M/115/UTP/Q                   
ASMI-50-1/M/115/V35                     
ASMI-50-1/M/230/UTP                     
ASMI-50-1/M/230/V35                     
ASMI-50-1/R/UTP                         
ASMI-50-1/S/115/UTP                     
ASMI-50-1/S/115/UTP/Q                   
ASMI-50-1/S/115/V35                     
ASMI-50-1/S/230/UTP                     
ASMI-50-1/S/230/V35                     



APPLICATION

    Figure 1
    - Central Site Application with Basic Management

     

    Figure 2
    - Central Site Application with SNMP Management

     

Table 1. Typical Data Rates for 2-wire Lines

Data Rate 19 AWG 22 AWG 24 AWG 26 AWG
(kbps) km miles km miles km miles km miles
1152 10.5 6.5 7.5 4.5 6.0 3.5 4.5 2.8
1024 11.0 7.5 8.0 5.0 6.5 4.0 5.0 3.0
896-960 12.0 7.5 9.0 5.5 7.0 4.2 5.5 3.2
768 12.5 8.0 9.5 6.0 7.5 4.5 5.5 3.2
576-640 13.5 8.0 9.5 6.0 7.5 4.5 5.5 3.0
512 14.5 9.0 10.5 6.5 8.5 5.0 6.0 3.5
384-448 16.0 10.0 11.5 7.0 9.0 5.5 6.5 4.0
64-320 18.5 11.5 13.0 8.0 9.5 6.0 6.5 4.0

Table 2. Typical Data Rates for 4-wire Lines

Data Rate 19 AWG 22 AWG 24 AWG 26 AWG
(kbps) km miles km miles km miles km miles
1152 11.0 7.0 8.0 4.2 6.5 3.8 5.0 3.0
1024 12.0 7.5 8.5 5.2 7.0 4.2 5.5 3.2
768-960 12.5 8.0 9.5 6.0 8.0 4.2 6.0 3.5
640 13.5 8.5 10.5 6.5 8.5 5.2 6.5 3.8
576 15.5 9.8 11.5 7.2 9.0 5.5 6.8 4.0
448-512 16.5 10.2 12.0 7.5 9.5 6.0 7.0 4.2
64-384 22.0 13.5 15.0 9.0 11.0 7.0 7.5 4.5

 

 

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For discount pricing on RAD Data Communications  
email us at sales@data-connect.com
or call 301-924-7400


     

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Olney, Maryland 20832