Response Code Response Summary Response Detail
100 Live Number dialled is active
110 Live Live & probably with CallMinder or VoiceMail service activated
120 Live Live - but with Call Minder on
130 Live Call rejected - number is ‘live’ at the time of validation but user has set up call barring.
140 Live Live with voicemail/automated attendant or diverted to mobile
500 Retry Ambiguous result - manual dial test required
510 Retry Number changed announcement message
520 Retry Long/short busy tone - network or exchange busy
530 Retry Temporarily out of service message
540 Retry Long/short busy tone - network congestion tone
900 Dead Number dialled has not been recognised
910 Dead Number unobtainable tone or message
920 Dead Invalid telephone number