Code:
perl -nle 'map{print} /<String>(.*?)<\/String>/g' Voice2.txt
530101,530103,530105,509091,509092,509093,509095,530100,509099
53546,50878,511150,51985,58595,563636,51980,50605,50405,55501,55255,55502,56694,55436,55437,518180,54334,58888084,55511,55522,563000,55507,55530,55541,55577,58327,54300,5303020,543210,554562,55323,50325,54400,511310,56660,56789,57323,52347,544111,55500,51802,54200,542001,57878,52000,50234,55694,54422,51121,54054,554356,53111,59888,53010,51477,51144,55321,55256,51967,50909,57677,1950,55177,52409,52256,52027,161,52134,58888111,58888511,58888711