Cisco Cisco VN 2900 Network Adaptation Interface Guía De Instalación

See the 

 for information on locating additional hardware 

documentation.

WAN interface cards and voice interface cards are not interchangeable. Voice interface cards cannot be 
installed in a WAN interface card slot or a two-slot WAN network module, and WAN interface cards 
cannot be installed in voice network modules. To prevent damage to the card, confirm that the slot or 
network module you intend to use supports the kind of interface card you intend to install.

Some Cisco network modules have one or two interface card slots, which support a variety of voice and 
data interface cards. To determine which interface cards are supported in your network module, see 

.

The following conditions apply to ISDN BRI and ISDN PRI network modules and interface cards:

Do not install an ISDN BRI WAN interface card or an ISDN BRI network module in the same 
chassis as an ISDN PRI network module unless you are using Cisco IOS Release 11.3(3)T or a later 
release.

Do not install newer BRI WAN interface cards in the same network module as older BRI WAN 
interface cards. To identify newer BRI WAN interface cards, examine the B-channel LEDs. Newer 
BRI WAN interface cards have B-channel LEDs that are arranged horizontally. Older BRI WAN 
interface cards have B-channel LEDs that are arranged vertically.

To install an interface card in a 1- or 2-slot network module, perform the following steps:

Turn off electrical power to the router. Leave the power cable plugged in to channel ESD voltages to 
ground.

(For the Cisco MWR 1941-DC router) Turn off power by turning the DC power source circuit breaker 
to OFF. Tape the circuit breaker in the OFF position. To channel ESD voltages to ground, do not remove 
the wire from the ground lug.

The following warnings apply to routers that use a DC power supply:

Before performing any of the following procedures, ensure that power is 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. Statement 7

To avoid electric shock, do not insert a WAN or voice interface card into a 2-slot module while power 
is on or network cables are connected. Statement 68

Remove all network cables, including telephone cables, from the router.