920-551 Exam

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Exam : Nortel 920-551
Title : GSM BTS 18000 Installation & Commissioning
Version : Demo


1. Click on the Exhibit button.
According to the exhibit, what is the maximum number of external alarm cables used to monitor the BTS environment?
A. 2
B. 3
C. 4
D. 5
Answer: A

2. In which order should the modules represented in the DDU be switched on during the procedure of powering on the GSM BTS 18020?
A. ECU, Digital/RICO, RF0, RF1
B. Digital/RICO, RF0, ECU, RF1
C. RF0, RF1, ECU, Digital/RICO
D. ECU, RF0, RF1, Digital/RICO
Answer: A

3. Click on the Exhibit button.
In which order should the Circuit Breakers (CBs) in the exhibit be switched on when powering on the GSM BTS 18010?
A. CB0 / CB1 / CB2 / CB3
B. CB1 / CB0 / CB2 / CB3
C. CB1 / CB3 / CB0 / CB2
D. CB3 / CB1 / CB0 / CB2
Answer: C

4. Click on the Exhibit button.
Using the information in the exhibit, calculate the ground resistance for a fully equipped GSM BTS 18010?
A. 604kg/m
B. 725kg/m
C. 800kg/m
D. 931kg/m
Answer: D

5. Click on the Exhibit button.
What is the effect in the BTS when the Circuit Breakers (CB), CB1 and CB3, are off?
A. Heater 1 is off.
B. Rectifiers in slots 1-2 are off.
C. The entire heating system is off.
D. Only rectifiers 3 and 4 are operational.
Answer: D

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