Russian version

Medusa3 (WAN E1/E3 adapter)


  • Framed/structured stream
  • link level protocols (Cisco/HDLC, PPP)
  • Software compatibility with Intel EtherExpress PRO 10+

The network interface card Medusa enables connectivity for computers with PCI bus via E1 digital trunk transmission equipment in compliance with standards ITU G.703, G.704 É ETSI ETS 300-248, TBR-12 (2048 kbit/sec, unstructured leased line service).

In particular, 2 leased TP wires from 0.7 up to 2.2 kms length without intermediate repeaters can be used- that is, interface card can serve as short-range modem (2048 Kbit/sec). (see details here).

Design:

  • The network interface card Medusa is compact, single-board module, using the most modern electronic components.
  • Automatic line build-out circuitry enables recieved signal attenuation 0-42 dB @ 1024 khz.
  • Qartz-based timing recovery circuit ensures effective jitter attenuation (meets ITU standard G.823 ).

Software

Medusa card supports two modes:
  1. Software compatible with Intel Etherexpress 10/pro+.
    In that mode only medusa board can be used on peer side.
    • Netware 3.x, 4x (4.11)
    • Windows 95 (ODI, NDIS 2, NDIS 3)
    • Windows NT 4.0, Windows 2000, Windows XP
    • OS/2
    • DOS (Packet drivers, NDIS, ODI)
    • Linux (kernel > 2.0.33)
    • FreeBSD.
  2. HDLC (PPP, CISCO/HDLC)
    • Linux (kernel > 2.0.x)

Mode switch:

  • J3=off Pseudo-Ethernet (Software-compatibly with Intel EtherExpress PRO 10+)
  • J3=on HDLC (PPP, cisco-hdlc)
    (*) Starting from second revision mode is controlled by software utility.

Medusa installation:

Connection with twisted pair (è1 RJ-45 socket)
  • 4 - Transmit
  • 5 - Transmit
  • 1 - Recieve
  • 2 - Recieve

Lightning guard:

If any part of cable is not within building or under ground - it is necessary to establish on both cable ends protection devices from APC, Mod-Tap, TRIPP LITE , etc. with 200A pulsing current tolerance.

Electrical surge protection:

  • Linear circuits of the interface card ( RJ-45 plug ) are protected by zenner diodes. These circuits meet IEC-801 test conditions:
    • 15 kV human body model
    • 15 kV air gap discharge
  • The semi-conductor components of the interface card can be damaged by static electricity influence .
  • It is recommended to hold interface card in antistatic package.

Part numbers

Modification Description
Medusa-G port G.703
Medusa-E1 port E1

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