5-15
Cisco Network Modules Hardware Installation Guide
OL-2485-20
Chapter 5 Connecting Serial Network Modules
4-, 8-, and 16-Port Asynchronous/Synchronous Serial Network Modules
Figure 5-17 16-Port Asynchronous/Synchronous Serial Network Module LEDs
The NM-16 A/S network module has LEDs that indicate the status of the port. When the LED is green,
the physical port is in the up state. When the LED is yellow, the port is in loopback mode. (See
Table 5-9
.)
EN
NM-
16A/S
82225
15
14
11
10
13
12
9
8
7
6
3
2
5
4
1
0
Status LEDs
Status LEDs
Enable LEDs
Table 5-9
16-port Asynchronous Status LEDs and Enabled LEDs
Mode
LED Color
Meaning
DCE
Green
Data terminal ready (DTR) and request to send (RTS) are present.
DTE
Green
Data set ready (DSR), data carrier detect (DCD), and clear to send (STC)
are present.
Loopback
Yellow
The port is in loopback mode