We currently have a Nortel MICS (v4.0) with 14 trunks and about 40 extensions. We are planning to upgrade to a PRI- (using only 12 channels) and have all the hardware ( just need to get the Keycode enabler). Could you give any advice on doing this with less than the full 24 channels. We could upgrade to newer software if needed, but see no need at this point. I Read in another post that it is tricky with an MICS using less than 24 channels. Is this possible or do we need to try somthing else? We are trying to save money and definitely don't need all 24 channels, ( may not even need 12). DO you have any advice, and do you think we'll need an installer? SO far, we've done it ourselves (we do have some exeperience with phones, but not much with nortel, until now)