Talk to your carrier about this.
Here's what I think is happening.
When an external caller rings into you, you answer it and then try to transfer it out, your 3300 is showing the external caller's caller ID as the source of the call. Since that number isn't authorized to call on your carriers network the carrier blocks it.
There is an option to change that in the ISDN options but there are times you would want to see the external caller ID and this would stop that. For example, if you transfer a call to a cell phone you may want to see the caller ID of the original caller.
Ralph
Thank you Ralph...
Based on the tests I've done and the outcome of each, that makes sense... It just doesn't seem like an issue with the transfer/conf call features, and your theory is the best I've seen so far...
Question... This is getting a little deeper than programming phones, etc so I'd rather ask than jump.. In your opinion, (don't worry, I won't hold you responsible if the phone system blows up...) what's the danger in changing the "replace external CLID" to TRUE and verify this is actually the issue?? I can't see any negatives, but as I mentioned previously, I'm more of an experienced newb than an expert..
The main reason this is a problem for us is not the call transfer, but actually the conference call, so seeing the original caller's ID isn't really that important.. In all honesty, I can see people here WANTING the caller ID to read our firm, not the original caller, so it may be a positive thing...
Your thoughts?? (and thank you again for your previous thoughts...)