For VOIP? Hop on hop off arrangement? Sipura 3000 fits the bill here. It is complicated to setup but is worth it. Grandstream makes a few models with both fxs and fxo in the same box. Give me a clue as to what you want to do and I will tell you what I know.

Feb 28 8:12 PM - Is the VOIP end coming to you from an ATA that the provider has sent you? Does that provider allow you to connect to their system without their box? Just a few more details and I am sure I can steer you right. Will callerid make a difference to you? Are you setting up an asterisk pbx? A good description of how you are going to hook up would help. For instance, my system is both a land line and a VOIP provider ATA. Asterisk is used to provide dialtone to 6 extensions in the house and to tie both the landline and the VOIP line in. I can call in the landline and get dialtone to call out the voip line. Ring 1 or all of the extensions in the house. Listen to a house monitor (microphones). It gives me the additional ability to select what hours my phone will ring and by whom. My setup cost me about $260 /not including the phones themselves or the computer to run asterisk. Asterisk is embeddable in a Linksys router or NAS so you could add that for another $80. The Sipura 3000 can be had for about $90 and come with 1 fxo and 1 fxs port.