4-Port ISDN BRI PIMs

The 4-port ISDN BRI PIMs have four physical ports that support the ISDN BRI S/T (Figure 30) or ISDN BRI U (Figure 31) interface type.

Figure 30: ISDN BRI S/T PIM

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Figure 31: ISDN BRI U PIM

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ISDN BRI PIMs provide the following key features:

For pinouts of cable connectors for ISDN PIMs, see ISDN RJ-45 Connector Pinout.

For installing and removing a PIM, see Replacing a PIM.

ISDN LEDs indicate PIM and port status. Table 31 describes the meaning of the LED states.

Table 31: LEDs for ISDN BRI S/T and U PIMs

Label	Color	State	Description
ONLINE	Green	Blinking	Call setup is successful on either the B1 or B2 channel.
	Green	On steadily	ISDN Layer 2 is active.
	Amber	On steadily	ISDN Layer 1 is active. ISDN Layer 2 is unavailable.
	Red	Disconnected	BRI interface port is not connected. ISDN Layer 1 is unavailable.
	Unlit	Off	BRI interface is offline.
STATUS	Green	On steadily	PIM is online and operational.
	Red	Disconnected	PIM is not operational and needs replacement.
	Unlit	Off	PIM is offline.