Ever thought of asking the cable provider what type of switch they use to provision their voice services? That to me would be the most logical first step. Much easier than attempting to guess what generated a tone. But then asking the provider is just too simple.
[TELECOM Digest Editor's Note: Yes, but would you get someone who knew what they were talking about? _That_ to me is always the big question when dealing with CSRs. Sounds good, but can you believe them? PAT]