Cisco 2600 Series Operation Manual page 26

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Installing a WAN Interface Card in a Network Module Slot
Warning
or network cables are connected.
Warning
contact with telephone-network voltages.
Warning
lightning activity.
Warning
module while power is ON or network cables are connected.
Note
router. Before inserting a WAN interface card into a base module that is already installed
in the router chassis, you must turn OFF electrical power.
Note
(BRI) WAN interface card or an ISDN BRI network module in the same chassis as an ISDN
Primary Rate Interface (PRI) network module, unless you are using Cisco IOS
Release 11.3(3)T or later. Earlier releases of Cisco IOS software do not support this
configuration.
Note
older BRI WAN interface card. The easiest way to identify the newer and older cards is to
observe the LED placement: on the newer card, the B-channel LEDs are arranged
horizontally and on the older card, the B-channel LEDs are arranged vertically.
3-4
Cisco Network Modules Hardware Installation Guide
Do not insert a WAN interface card into a base module slot while power is ON
Before opening the chassis, disconnect the telephone-network cables to avoid
Do not work on the system or connect or disconnect cables during periods of
To avoid electric shock, do not insert a WAN interface card into a two-slot
A WAN interface card can be installed in a module that is already installed in a
Do not install an Integrated Services Digital Network (ISDN) Basic Rate Interface
Do not install a newer BRI WAN interface card in the same network module as an

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