Cisco 1003 User Manual page 2

Overview of the Cisco 1003 and Cisco 1004 Routers
Overview of the Cisco 1003 and Cisco 1004 Routers
The Cisco 1003 and Cisco 1004 routers provide Integrated Services Digital Network
(ISDN) capability in a small, desktop router. The routers connect small, remote sites with
Ethernet LANs to WANs.
The main difference between the two routers is that the Cisco 1004 router includes an
integrated network termination 1 (NT1) device and the Cisco 1003 router does not. The
ISDN service provider supplies the NT1 connection worldwide, except in North America,
where the NT1 device is supplied by the customer. Therefore, the Cisco 1004 router is for
use in North America, and the Cisco 1003 router is ideally suited for use elsewhere.
From the front, the outward appearance of the routers is the same.
2 Cisco 1003 and Cisco 1004 User Guide