Thinking of some of your wide ranges in use for this logo i have design it to be clearly transferred through print (eg. if it ever needs to be in black & White), Web and whatever uses you might need.
This is very clean - i like it. I 'wish' there were a way to add voice/data/wireless "stuff" to it, but that would clutter it up I suppose...right now the logo doesn't "say" what we do...but I like it...!!!
Would you resubmit a copy of #18 with: Black typeface for "CTCA" and grayscale background behind the ".info". The "communicating technology clearly" type should match in color the background behind the ".info" like you have now. Would like to see how that looks. What is the typface you are using for CTCA and the .info ? I like that.
I actually have a few more ideas for this logo regarding the voip/ wireless as a friend of mine works in this field after i uploaded it but as it was 4 in the morning over here i decided to leave it till morning. Unfortunately the design insomnia had kicked in so still awake. I'll resubmit your requests no problem and i'll add a new one with the ideas i had earlier. Hopefully should be with you very soon.
I can see the evolution - but I think the earlier ones are more-attractive to my engineers (if there are elements "leaving" the logo I think the engineering brain would look for "cause" or "reason" or "purpose" for the design element 'departing' the logo...if it were a "radio wave" or "data" or a "voice call" or "brain waves" leaving the logo, perhaps they would accept it...but your "simpler/cleaner" design is very nice!