Cisco1004 Router

The Cisco 1004 ISDN router broadens the range of WAN options supported by the Cisco 1000 series routers. The Cisco 1004 includes all the features of the highly popular Cisco 1003 ISDN router and adds an integrated NT1 to the ISDN BRI port. Therefore, the Cisco 1004 is appropriate for use in North America, where customers normally supply the NT1.

General Description
Device Type: Cisco Router 1000 Series.
RAM: 4.0 MB Weight: 2.0 lbs Built-in Devices: None
Data Link Protocol: HDLC , ISDN , Ethernet
Switching Protocol: Ethernet , PPP , Frame Relay

Source: Knowledge Computers Cisco1001