Datasheet

Connecting Cisco CEoIP Network Modules to the Network
Connecting 4-Port Serial Interface Network Modules to the Network
3
Connecting Cisco CEoIP Network Modules to the Network
4-Port Serial Interface Network Module (NM-CEM-4SER) LEDs
See Figure 3 for the location of network module LEDs and Table 1 for LED descriptions.
Figure 3 4-Port Serial Interface Network Module (NM-CEM-4SER) LEDs
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:
• Data Terminal Ready (DTR)
• Data Set Ready (DSR)
• Request to Send (RTS)
• Clear to Send (CTS)
• Data Carrier Detect (DCD)
• Local Loop (LL)
Table 1 4-Port Serial Interface Network Module (NM-CEM-4SER) LEDs
LED Color Meaning
ACT Green The channel on this port is operational.
LP Yellow A local or network loopback is present on the port.
AL Red Not used.
EN Green The network module has passed self-test and is available to the router.
AL
EN
NM-CEM-4SER
See Manual before installation.
Connectors for Extended
Control Signals
CEM 3
CEM 1
CEM 2
CEM 0
ACT LP
LP ACT
88922
Loopback
Active
Active
Alarm
Enable