English: An example of a UK ringback tone, ringing six times. The double beep tone is created by modulating a 400Hz and 450Hz tone together, sounding 0.4s on, 0.2s off, 0.4s on, 2.0s off.
{{Information |Description={{en|1=An example of a UK ringback tone, ringing six times. The double beep tone is created by modulating a 400Hz and 450Hz tone together, sounding 0.4s on, 0.2s off, 0.4s on, 2.0s off.}} |Source={{own}} |Author=[[User:Lcmortens