Cisco CISCO2650 - 2650 Router Hardware Installation Manual page 293

Chapter 27 Connecting Circuit Emulation Over IP Network Modules
4-Port Serial Interface Network Module (NM-CEM-4SER) LEDs
See
Figure 27-3 4-Port Serial Interface Network Module (NM-CEM-4SER) LEDs
NM-CEM-4SER
Table 27-1 4-Port Serial Interface Network Module (NM-CEM-4SER) LEDs
LED
ACT
LP
AL
EN
Connecting 4-Port Serial Interface Network Modules to the
Network
The 4-port serial interface network module uses Smart Serial connectors, permitting each port to support
a basic or extended set of serial control signals, depending on the cable connected to the port.
Caution To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety,
connect the 4-port serial interface network module (NM-CEM-4SER) only to intrabuilding or
nonexposed wiring or cabling. The intrabuilding cable must be shielded and the shield must be grounded
at both ends.
The following basic set of control signals is used on Cisco 12-in-1 cables:
•
•
•
•
•
•
OL-2485-20
Figure 27-3 for the location of network module LEDs and
CEM 3
ACT LP
CEM 1
Active
Color
Green
Yellow
Red
Green
Data Terminal Ready (DTR)
Data Set Ready (DSR)
Request to Send (RTS)
Clear to Send (CTS)
Data Carrier Detect (DCD)
Local Loop (LL)
Connecting 4-Port Serial Interface Network Modules to the Network
Loopback
Meaning
The channel on this port is operational.
A local or network loopback is present on the port.
Not used.
The network module has passed self-test and is available to the router.
Cisco Network Modules Hardware Installation Guide
Table 27-1 for LED descriptions.
See Manual before installation.
CEM 2
LP ACT
EN
AL
CEM 0
Active
Alarm
Enable
27-3