The Cisco 1000 series of compact, fixed-configuration routers provide low-cost, high-speed connectivity for branch and small offices. Available in synchronous and asynchronous models.

There are currently three Cisco 1000 series models:

• Cisco 1003 ISDN router
  • One 10BaseT Ethernet port (RJ-45)
  • One ISDN BRI WAN port (RJ-45)
  • One console port (RJ-45)
  • One Type-2 PCMCIA slot for Flash ROM card
• Cisco 1004 ISDN router
  • One 10BaseT Ethernet port (RJ-45)
  • One ISDN BRI WAN port (RJ-45), with an integrated NT1 device
  • One console port (RJ-45)
  • One Type-2 PCMCIA slot for Flash ROM card
• Cisco 1005 serial router
  • One 10BaseT Ethernet port (RJ-45)
  • One serial WAN port (DB-60) that supports asynchronous serial communications up to 115.2 kbps (EIA/TIA-232 interface) and synchronous serial such as leased lines, Frame Relay, switched 56 kbps, SMDS, X.25 up to 2.048 Mbps (EIA/TIA-449, V.35, X.21, and EIA-530)
  • One console port (RJ-45)
  • One Type-2 PCMCIA slot for Flash ROM card