1-30
Cisco 2900 Series and 3900 Series Hardware Installation Guide
OL-18712-02
Chapter 1 Overview of the Routers
LED Indicators
Note
On the Cisco 2911, 2921, 2951 routers and Cisco 3900 series routers the interface numbering scheme is
the same for asynchronous interfaces as for other types of interfaces. To configure the line associated
with an async interface, use the interface number to specify the async line. For example, line 0/3/0
specifies the line associated with interface serial 0/3/0 on an WIC-2A/S in slot 3. Similarly, line 1/22
specifies the line associated with interface async 1/22 on an NM-32A in network module slot 1.
LED Indicators
Table 1-13
summarizes the LED indicators that are located on the router bezel or chassis, but not on the
removable modules or interface cards.
For descriptions of LEDs in removable modules and interface cards, see the applicable documentation
for those products.
For LED troubleshooting information, including possible trouble causes and corrective actions, see
Table 1-13
.
Voice port in a BRI expansion
module (internal slot) in an
extension voice module (EVM)
Interface-type
2
/
0
/
port
Port numbers are 8 to 11 in expansion module 0.
Port numbers are 16 to 19 in expansion module 1.
voice-port 2/0/x
BRI interface in a BRI expansion
module (internal slot) in an
extension voice module
Interface-type
2
/
port
Port numbers are 0 to 3 if one expansion module is installed.
Port numbers are 0 to 7 if two expansion modules are installed.
interface bri 2/x
1. Interface abbreviations: fa = Fast Ethernet; gi = Gigabit Ethernet; USB = universal serial bus; BRI = ISDN basic rate interface.
2. The interfaces listed are examples only; other possible interface types are not listed.
3. Only interface card slot numbers 1 and 3 are used for double-width (HWIC-D).
4. Specify the line number in the Cisco IOS command-line interface (CLI) by using the interface number for the associated asynchronous serial
interface.
5. The network module slot number is 1 for all Cisco 2900 series routers.
Table 1-12
Interface Numbering on Cisco 2911, 2921, 2951 ISRs and Cisco 3900 ISRs (continued)
Port Location
IOS Command Line Interface
Examples
1
,
2
Table 1-13
Cisco 2900 and 3900 Series Routers LED Indicators
LED
Color
Description
Cisco 2900
Routers
Cisco 3900
Routers
POE
Green
IP phone power is on.
Front bezel
Front bezel
Amber
IP phone power is not on.
POE Boost
Green
IP Phone power is supplied by
POE Boost power supply.
—
—
Off
External POE Boost power
supply is not on.
—
—
PS/PS1
Green
System is running.
Front bezel
Front bezel
Amber
System is not running.