ZTE Corporation ZXG-BTS2 Manuale Utente

 
 

Chapter 2 - Technical Indices 

Confidential and Proprietary Information of ZTE CORPORATION 21 

Environmental Conditions 

Temperature and Humidity Requirements 

Working temperature: -5 ºC ~ 45 ºC 

Relative humidity: 10% ~ 90 %, no condensation 

Grounding Requirements 

The case of the rack should be grounded well, with the grounding 

resistance less than 5 ohm. 

Atmospheric Pressure Requirements 

1.08 × 10

5 

pa ~ 5.1 × 10

4 

pa (-500 mm ~ +500 mm)  

Lighting 

Direct sunshine should be avoided to prevent the circuit boards and other 
components from aging and deforming. The average illumination should be 

300x ~ 450lx and no glare should exist. 

Air Pollution 

Erosive gases, smog and smoking are prohibited in the equipment room. 

Interface Indices 

Abis Interface Indices 

The Abis interface adopts the standard E1 interface. 

The performance of the Abis interface meets the requirements specified by 

ITU-T G.703 and ITU-T G.704. Details are as follows:  

1. Basic requirements 

i.  Nominal bit rate: 2,048 Kbit/s 
ii.  Bit rate tolerance: ± 50 × 10

-6

  

iii.  Signal code pattern: HDB3 

2. Electrical features 

i.  Pulse shape: rectangular  
ii.  Nominal peak voltage of pulse (mark):  

2.37 V (75 ohm, a pair of coaxial cables).