Card Type	T1 CSU/DSU
Chipset	Unidentified
T1 Transfer Rate	1.544Mbps
T1 Protocol	AMI, B8ZS
Frame Type	SF, ESF, Ericsson
Data Bus	Serial

CONNECTIONS
Function	Label	Function	Label
PREVIOUS button	BT1	V.24 DCE serial control port	CN6
NEXT button	BT2	V.24 DTE serial control port	CN7
ESCAPE button	BT3	EIA-530 or V.35 serial data port 1	CN8
SELECT button	BT4	EIA-530 or V.35 serial data port 2	CN9
Monitor receive port	CN1	Fuse for power source 1	F1
Monitor transmit port	CN2	Fuse for power source 2	F2
T1 line out (Network interface)	CN3	LCD display	LCD
RS-422 auxiliary clock port	CN4	PCMCIA slot	SL1
T1 line in (Terminal interface)	CN5	DC power in (see pinout below)	SC1
Note:Standard V.35 serial ports are available on included adapter cables.

SC1 PINOUT
Function	Screw	Function	Screw
+24 to +48DC power in	1	-24 to -48DC power in (source 1)	3
Ground	2	-24 to -48DC power in (source 2)	4

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
RXD	Yellow	On	DSU is receiving data from data port indicated by LED1-2
RXD	Yellow	Off	DSU is not receiving data from data port indicated by LED1-2
TXD	Yellow	On	DSU is transmitting data to data port indicated by LED1-2
TXD	Yellow	Off	DSU is not transmitting data to data port indicated by LED1-2
CTS	Yellow	On	Data port indicated by LED1-2 CTS is high
CTS	Yellow	Off	Data port indicated by LED1-2 CTS is low
RTS	Yellow	On	Data port indicated by LED1-2 RTS is high
RTS	Yellow	Off	Data port indicated by LED1-2 RTS is low
1	Yellow	On	TXD, RXD, CTS, and RTS LEDs indicate status of data port 1
1	Yellow	Blinking	Loss of Signal detected on data port 1
1	Yellow	Off	TXD, RXD, CTS, and RTS LEDs do not indicate status of data port 1
2	Yellow	On	TXD, RXD, CTS, and RTS LEDs indicate status of data port 2
2	Yellow	Blinking	Loss of Signal detected on data port 2
2	Yellow	Off	TXD, RXD, CTS, and RTS LEDs do not indicate status of data port 2
DATA	Green	On	Valid data signal detected on T1 network interface
DATA	Green	Off	No valid signal detected on T1 network interface
RED	Red	On	Loss Of Signal condition detected on T1 network interface
RED	Red	Slow blink	Alarm Indication Signal condition detected on T1 network interface
RED	Red	Fast blink	T1 network interface signal is out of frame synchronization
RED	Red	Off	No red alarm conditions detected on T1 network interface
YEL	Yellow	On	Remote Loss Of Signal or out of frame synchronization condition detected on T1 network interface
YEL	Yellow	Off	No remote Loss Of Signal or out of frame synchronization condition detected on T1 network interface
T1	Green	On	Valid data signal detected on T1 terminal interface
T1	Red	On	Loss Of Signal, out of frame synchronization, Alarm Indication Signal, or yellow alarm condition detected on T1 terminal interface
T1	N/A	Off	No valid signal detected on T1 terminal interface

DIAGNOSTIC LED(S) (CON’T)
LED	Color	Status	Condition
TEST	Yellow	On	Local loopback test in progress
TEST	Yellow	Blinking	Test code, remote loopback, or Bit Error Rate Test in progress
TEST	Yellow	Off	No tests are in progress
PWR	Green	On	Power is on
PWR	Red	On	Self-test failed
PWR	Green	Blinking	User is logged in
PWR	Alternating green/red	Blinking	Downloading software
PWR	N/A	Off	Power is off