UP0/S0 Adapter

Article number 90436

Converts from 2-core UP0 to 4-core S0.


  • 1 internal S0 port (PTMP connection, DSS-1) via 2-core connection

  • Simple installation using Western plugs, a fixed installation ensured via screw terminals
  • 2 RJ-45 plugs for ISDN system telephones from the COMfortel® series and standard ISDN devices

  • LEDs for displaying operational states
  • Can be operated as a desktop or wall-mounted device
UP0/S0 Adapter
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With the UP0/S0 adapter, ISDN system telephones from the COMfortel series and standard ISDN devices can be adapted to the UP0 port of a PBX. Enables "old" 2-core cables to be useable for ISDN connections.


Features & technical data

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Accessory Functions

  • Adapter for connection at a 2-wire-UP0 port, transforming to 4-wire S0 interface
  • 1 internal S0 port with 2 plugs for 2 system or ISDN telephones
  • Power supply via the UP0 port
  • Installation via western plugs, fix installation via screw terminals possible
  • LEDs for signalling operating and functional states

Please note: information depending on the configuration level of the system. For detailed information please refer to the datasheet. Subject to modification.

Technical Highlights
Dimensions Diameter 2 (mm) 95 / Height (mm) 33 / Width (mm)
Connections UP0 port (connection to PBX) 1 / S0 port (Euro ISDN [DSS-1], PTMP) 1
Operating voltage via PBX U0 port via PBX UP0 port / 1x UP0 port for connection to the telephone system, 2x S0 port Euro-ISDN (DSS-1), PTMP
Casing material plastic
Weight (g) 100
Range of internal S0 port 150
Delivery scope
  • UP0/S0 Adapter
  • UP0 connection cable RJ-45/RJ-11 (ca. 4 m)
  • User manual
  • Mounting material (screws and dowel)

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Datasheet download

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