Clarinet-Book ISDN U/E1

Standard features

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

Functions Supported


  • One Interface Under Test (BRI or PRI) selected by software
    • BRI: U
    • PRI: E1
  • Operating interfaces to external equipment
  • PH, SL monitor links (64 kbit/s), DL (1920 kbits/s)
  • Signaling Link emulation: Q921, Q931, X25.
  • Data Link emulation: BERT ,BOP X25 or Frame Relay, BYTE-TS
  • Digital connection/cross-connection on up to 32 TS.

Connection to Interface Under Test


  • U interface - 2B1Q - ITU 961 recommendation
  • two "ISO-8877 modular plug" 8-pin sockets:
    • one "TO LE"
    • one "TO NT"
  • External Power Supply connector (Power feeding in NT emulation)
  • Monitor / NT emulation / TE emulation


  • E1/PCM-CEPT-32TS - ITU G703/G704/I431 recommendations
  • Monitor / NT emulation / TE emulation
  • Two different models: 120 Ohms or 75 Ohms impedance

Connection to Operating Interfaces


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


  • One 9-pin SUBD socket
  • E1 interface carrying up to 31TS


  • ANALOG I/O: one "ISO-8877 modular plug" socket
  • HANDSET: 4-pin modular plug socket

System and Power Connection


  • Two 50-pin micro Sub-D female sockets
  • Up to 4 Clarinet-Book units on the SCSI2 bus


  • European/UK AC adapter: 220 to 240 volts
  • US AC adapter: 100 to 120 volts

Host Computer

  • Windows™ 95 or Windows™ NT
  • PC Desktop or Notebook with SCSI2 Adapter
  • Clarinet Software Run-time installed

Packaging & Regulation

Unit Package

  • Size:187 x 136 x 45mm.
  • Weight: 0.750 kg


Plastic Case Including:
  • Clarinet-Book
  • Power Supply
  • SCSI2 cables and termination
  • Accessories

Ordering Information


Product Designation


Clarinet-Book ISDN U/E1-120 Ohms

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Last modification: 27/02/04