bote@uunet.uu.net (phantom) (06/11/89)
While excercising the local DMS-100 switch, we encountered a neat happenstance. Occasionally, the switch will refuse to allow us to release and re-request dial tone, no matter what we try, including the 'ABCD' trick. If we hang on the line, when it finally resets, we hear a quick sequence of about 5 tones starting at around 800Hz and stepping up to around 2500Hz. What are these things? Also, curious how common this occurence is. We have noticed this a few times before in the last year. TNX