Clarinet-Book USB U/S-T

Standard features

Functions supported
Connection to Interface under Test
Connection to operating interfaces
System and power connection
Packaging & regulation
Ordering information

Functions Supported


  • One ISDN BRI  Interface U or S-T Bus selected by software
  • ISDN Trunk applications
  • IP, X25, Frame Relay Data Protocols.
  • Digital connection/cross-connection on up to 32 TS.

Connection to Interface Under Test


  • U interface - 2B1Q - ITU G961 recommendation
  • Two RJ45 sockets: one "TO LE" and one "TO NT"
  • External Power Supply connector (Power feeding in NT emulation)
  • Monitor / NT emulation / TE emulation


  • ISDN BRI S-T bus - ITU I430 recommendation
  • Two RJ45 sockets
  • External Power Supply connector (Power feeding in NT emulation)
  • Monitor / NT emulation / TE emulation


Connection to Operating Interfaces


  • One SUBD-HD 15-pin female socket.
  • X24 interface (DCE type)
  • 64 k or nx64 k clock; octet clock


  • Handset: 4-pin RJ11 socket

Internal resources


  • Full access to all  TSs: switching, loop, transfer to Transit

Voice processing

  • Two COFIDECs (A law / µ law): selection by software
  • Two DTMF tone generator / receiver circuits

System and Power Connection


  • 1 USB connector (type B)


  • Power fed by USB power
  • Internal Batteries charged by AC/DC Adapter
  • External DC/AC adapter: 100 to 250 volts (European/UK/US plugs options)

Host Computer

  • Windows™ 98 or Windows™ 2000
  • PC Desktop & Notebook  with USB Port or USB-HUB
  • Clarinet Software Run-time installed

Packaging & Regulation

Unit Package

  • Size:187 x 136 x 45mm.
  • Weight: 0.550 kg


  • Tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules.
  • CE marking implies conformity to:
    • EN 55022/1994 Class A- Radio Frequency Interference
    • EN50082-1/1992 Electromagnetic Immunity
    • EN60950 Product safety


  • Plastic case including:
    • Clarinet-Book
    • External AC/DC Adapter
    • Handset
  • Free set of a accessories

Ordering Information

Part Number

Product Designation


Clarinet-Book USB U / S-T


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Last modification: 27/02/04