Cisco 1605-R How To Use Manual page 36

Installing a Network Module in a Cisco 3600 Series or Cisco 2600 Series Router
•
Asynchronous modem (serial card only)—Used to connect the WAN interface card to
an analog telephone line.
•
Synchronous modem, channel service unit/data service unit (DSU/CSU), or other data
circuit-terminating equipment (DCE) (serial card only)—Used to connect the WAN
interface card to a digital WAN line.
•
External NT1 (ISDN BRI S/T and ISDN BRI S/T Leased-Line cards only)—Used to
connect the WAN interface card to an ISDN interface.
Installing a Network Module in a Cisco 3600 Series or
Cisco 2600 Series Router
This section describes how to install a network module (for WAN or voice interface cards)
in a Cisco 3600 series or Cisco 2600 series router.
To install a WAN or voice interface card in a network module or to install a WAN interface
card in a Cisco 2600 series chassis slot, see the "Before Installing a Voice Interface Card"
section on page 2-5.
To install a WAN interface card in a Cisco 1720 router or Cisco 1600 series router, see the
"Installing a WAN Interface Card in a Cisco 1720 Router or Cisco 1600 Series Router"
section on page 2-9.
Warning
equipment.
Warning
removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker
on the panel board that services the DC circuit, switch the circuit breaker to the OFF
position, and tape the switch handle of the circuit breaker in the OFF position.
2-2 Cisco WAN Interface Cards Hardware Installation Guide
Only trained and qualified personnel should be allowed to install or replace this
Before performing any of the following procedures, ensure that power is