Cisco Systems PA-4T manual LEDs

LEDs

Table 1-7	X.21 Adapter Cable Signals
DTE Cable (CAB-X21MT=)						DCE Cable (CAB-X21FC=)
Router End, HD1					Network End,	Router End, HD					Network End,
60-Position Plug					DB-15 Plug	60-Position Plug					DB-15 Receptacle
Signal		Pin		Pin	Signal	Signal	Pin			Pin	Signal
Shield ground		46		1	Shield ground	Shield ground	46			1	Shield ground
TxD/RxD+		11	—>	2	Transmit+	RxD/TxD+	11	—>	2	Transmit+
TxD/RxD–		12	—>	9	Transmit–	RxD/TxD–	12		—>	9	Transmit–
RTS/CTS+		9	—>	3	Control+	CTS/RTS+	9	—>	3	Control+
RTS/CTS –		10	—>	10	Control–	CTS/RTS –	10		—>	10	Control–
RxD/TxD+		28	<—	4	Receive+	TxD/RxD+	28	<—	4	Receive+
RxD/TxD–		27	<—	11	Receive–	TxD/RxD–	27		<—	11	Receive–
CTS/RTS+		1	<—	5	Indication+	RTS/CTS+	1	<—	5	Indication+
CTS/RTS –		2	<—	12	Indication–	RTS/CTS–	2		<—	12	Indication–
RxC/TxCE+		26	<—	6	Timing+	TxC/RxC+	26	<—	6	Timing+
RxC/TxCE–		25	<—	13	Timing–	TxC/RxC –	25		<—	13	Timing–
Circuit ground		15		8	Circuit ground	Circuit ground	15			8	Circuit ground
Ground		48			Shorting group	Ground	48				Shorting
Mode_2		47				Mode_2	47				group
Ground		51			Shorting group	Ground	51
Mode_DCE		52				Mode_DCE	52

1 HD = high density.

LEDs

The PA-4T+ contains the enabled LED, standard on all port adapters, and one status LED for each port. After system initialization, the enabled LED goes on to indicate that the PA-4T+ has been enabled for operation. (The LEDs are shown in Figure 1-9.)

Figure 1-9 LEDs on the PA-4T+—Horizontal Orientation

EN

TD TC RD RC LB CD

H4491

The following conditions must be met before the PA-4T+ is enabled:

•

•

•

The port adapter is correctly connected to the backplane midplane and receiving power.

A valid system software image for the port adapter has been downloaded successfully.

The system software recognizes the port adapter or VIP2 with an installed PA-4T+.

Overview 1-15