I have never seen Caller ID supported in the analog version of DID. Yes, you can get Caller ID on the digital versions, such as T1 or PRI, but not on pure analog. It might be avialble, but I have never seen it in my 20 yrs.
CLID has been available on analog for many years, however, old PBXs often times did not have the necessary software/line cards to support the features. I'm glad others are finding the data now, too. We have successfully configured CLID on CAS T1s, but again, the interdigit and wink timers took serious tracing to determine the correct settings. I'm not an expert in the IOS, but there is information available in the command reference guides (at least for T1 CAS) if you are able to verify the provisioning with your service provider
OK, I've learned more, so here it is for the sake of any idle curiosity that's out there.
Caller ID over analog DID is indeed possible, and a few telcos actually provide it. It's basically appended to the incoming DID digits, and separated by a delimiter digit (* for example). It's VERY non-standard, however, and the timing and intelligence required to interpret it makes it prohibitive for most manufacturers to make equipment that supports it - Cisco included.
Thanks to all of you for helping me out with this bizarre topic.
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