This specification is applicable to the assessment and evaluation of the earthquake-resistant communication technical performance of telephone switching equipment entering areas with a seismic fortification intensity of 7 to 9 degrees.
YD 5084-2005 history
2014YD 5084.1-2014 Specification for Seismic Test of Switching Equipment.Part 1: Program-controlled Digital Telephone Exchange
2006YD 5084-2005 Specification for Seismic Test of Switching Equipment
1999YD 5084-1999 Interim Provisions for Test of Anti-seismic Performances of Digital Program Control Switching Equipment