With the use of an USS an additional line power supply can be attained for S0 (ISDN 2 /BRI) Interfaces
Frequently it happens that the switch does not supply enough power or even no power which may be required on the S0 (ISDN 2 / BRI) Interfaces.
With the use of an USS the existing S0 (ISDN 2 / BRI) Interfaces can be supplied with 2 Watts of power.
Ordering Information:
USS | 2F4033 |
Technical Specifications USS
Mechanical Data | |
dimensions | 8.8 cm x 6.7 cm x 12.5 cm |
weight | 0.4 kg |
Electrical Data | |
Input Power | 230 V ~, 20 mA |
Output Power | 38 V +/- 10%, 60 mA Max. |
Protocol | The S0-Interface is according to I.430 specifications |
Environmental Conditions | 0 – 70 Grad Celsius with a maximum humidity of 70 % (non-condensing) |
Further information can be found in the Guidelines which are available for Download.

Function:
Supply of S0 (BRI) -Interface Line Power
With the USS you have the possibility to supply S0-Interfaces with remote line power or at a later date to increase line power to already existing S0 -Interfaces. The power output of 2 watts will then be attainable.