Chapter 3 - Technical Specifications 
Confidential and Proprietary Information of ZTE CORPORATION  27 
Waterproof  and  dustproof  requirements:  IP  5.5  level  of  the 
International Electrotechnical Commission (IEC). 
Internal battery: Four pieces of 12 V 100 Ah batteries 
Rack weight: About 300 kg (without batteries and air conditioner) 
Environment Conditions 
  Temperature:  
Long-term: 15ºC ~ 30ºC 
Optimal: 20ºC ~ 25ºC 
Short-term: 0ºC ~ 45ºC 
  Humidity 
Long-term: 30% ~ 75% RH 
Optimum: 50% ~ 60% RH 
Short-term: 20% ~ 90% RH 
 
Note: The short-term working condition allowed means 48 hours in succession and 
15 days accumulated per year at most. 
System Performance Indices  
Capacity 
Analog  subscribers  only:  1,856  lines;  ADSL  subscribers  only:  928  lines; 
and 240 VOIP ports  
Processing Capabilities 
BHCA: 20K 
Reliability 
  System cold startup time is less than five minutes. 
  Gateway  availability  is  more  than  99.999%,  that  is  to  say,  the  time 
when the system is unavailable is less than five minutes per year. 
  System MTBF is greater than 69,000 hours.