ruggednetworks.net, industrial router dx900 four serial and 4 ethernet with wan port t1 or dds by garrettcom model dx900-03-h and dx900-01-h. Industrial routers by garrettcom.
Patton 2603 Low Cost Point to Point T1 or E1 Routers
Best Buy: HP T1 Multi-Service Router A-MSR20-12
Affordable Point to Point T1 Router
Modem Router ADSL Zyxel Prestige P660HW-T1 V3 -
RAD T1 or Fractional T1 Access Unit With Router - WirelessUnits.com