Instruction Manual

that you understand the potential impact of any command.
Conventions
For more information on document conventions, refer to the Cisco Technical Tips Conventions.
Hardware Overview
Cisco 1600 Series Routers are composed of these router models:
Cisco 1601 and 1601REthernet/Serial Modular Router•
Cisco 1602 and 1602REthernet/Serial Modular Router with 56K CSU/DSU (4−wire)
Cisco 1603 and 1603REthernet/ISDN−BRI (S/T interface) Modular Router
•
Cisco 1604 and 1604REthernet/ISDN−BRI Modular Router with NT1 (U interface)•
Cisco 1605RDual Ethernet Modular Router•
In addition, all the 1600 router models have one WAN interface card (WIC) slot where you can insert one of
the WAN Interface Cards for the Cisco 1600 Series Routers.
Cisco 1601
Figure 1  Cisco 1601 and 1601R Rear Panel
Cisco 1602
Figure 2  Cisco 1602 and 1602R Rear Panel
Cisco 1603
Figure 3  Cisco 1603 and 1603R Rear Panel
Cisco 1604
Figure 4  Cisco 1604 and 1604R Rear Panel
Cisco − Cisco 1600 Series Router Architecture