In general, only cables used for data are terminated on patch panels. The other cables are usually terminated on 66 or 110 blocks. Phone technicians really don't like it when patch panels are used for voice circuits since most phone systems don't use plug-cord connections. They would have to make an unneccessary transition from hard-wired terminations to plug-ended cables; just something else that can fail or cause more work.
Now, if you are sure that a VOIP phone system is being installed, then you probably should terminate the voice cables on patch panels as well. You'll need to find this out from the customer before you begin. Regardless, cables for fax or other uses still should be terminated on 66 or 110 blocks.
Typical patch panels (unless you order them differently) are equipped with built-in 110 blocks on the back side. The data cables are simply punched down on them directly.
