Tha part of LAN ports an DHCP, it has solved, about the 1000 conecction I understand that are like a VPN/MPLS o FR Public network in which case the use of 3700 should be ok.If you are thinking in a DS0 for conections all them in some T1s could be a ...

You can use it to networking with printers more advanced, you can use as the way you use a bridge but use it for less users (8 max.)