Nokia DNT2Mi-fp user manual Mean time between failure Mtbf, Electromagnetic compatibility, Safety

Technical specifications

Table 7. DNT2Mi-fp power supply (Continued)

Voltage	90 to 264 VAC
Frequency	47 to 65 Hz
DC power supply

Voltage

48V (40V to 70V)

Remote power supply

Voltage	50 to 150 V on both pairs as generated through ACL2i
	at central site
Start-up voltage	Min. 90 VDC

Table 8. Mean time between failure (MTBF)

DNT2Mi-fp

> 75 years

Electromagnetic compatibility (EMC) of DNT2Mi-fp complies with the following specifications:

Table 9.	Electromagnetic compatibility
EN 55022: 1998 Class B		Emission, Information technology equipment
EN 55024: 1988		Immunity, Terminal equipment
EN 300286: 2000		EMC, Telecommunications equipment

Table 10. Safety

Safety IEC 60950-1 and IEC 60950-21 RFT-C

•Protective earthing and Basic insulation

AC Power supply:

•Surge protection: 2.5kV according to ITU-T Rec. K.45

DC Power supply:

•Surge protection: 0.5kV according to EN61000–4–5

Line Interface:

•Surge protection: 1.5kV according to ITU-T Rec. K.45

•50 Hz common mode test according to ITU-T Rec. K.45

•600V RMS common mode according to ITU-T Rec. K.45

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