Cisco Systems OL-12811-01 PRI Module LEDs, Connecting CE1/PRI-U Modules to the Network, Meaning

Connecting Cisco ISDN PRI Network Modules to the Network

PRI Module LEDs

Connecting CE1/PRI-U Modules to the Network

To connect a CE1/PRI-U (75-ohm) module to the network, use the appropriate cable to connect the CE1/PRI-U port to an E1 CSU (see Figure 18). These ports are color-coded tan. The illustration shows a CSU with BNC connectors.

Figure 18 Connecting a CE1/PRI-U Module to an E1 CSU (DB-15-to-BNC Connectors)

FE-PRI
1FE-1CE1-B/U
REMOTE ALARM	LOCAL ALARM	LOOP BACK	CARRIER DETECT

CTRLR 0

				10/100BaseT
COLL	LINK	100Mbps	FDX	EN

CE1/PRI-U

E1 cable for 75-ohm unbalanced connections with BNC connectors at the network end

H7471

E1 CSU

BNC connectors

PRI Module LEDs

All network modules have an enable (EN) LED. This LED indicates that the module has passed its self-tests and is available to the router.

All PRI modules display four additional LEDs for each port. These LEDs are described in Table 4.

Table 4	ISDN PRI Network Module LEDs
LED	Meaning
RA	Local alarm at remote end of connection
LA	Loss of signal, loss of frame, or unavailability because of
	excessive errors
LP	Loopback mode
CD	Carrier received on telco link

Channelized T1/E1 PRI Network Module with G.703 LEDs

Figure 19 and Figure 20 show channelized T1/E1 PRI network module with G.703 LEDs. See Table 5 for LED definitions.

For LEDs found on all PRI network modules, see Table 4.

Connecting Cisco ISDN PRI Network Modules to the Network

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