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

CONNECTIONS
Function	Label	Function	Label
T1 line in	CN1	V.35 serial data port via DB-25 connector	CN5
DCE serial control port	CN2	AC power in	CN6
DTE serial control port	CN3	Alarm cutoff switch	S5
EIA-530 serial data port	CN4
Note:Standard V.35 serial port is provided on an included adapter cable.

USER CONFIGURABLE SETTINGS
Setting		Label	Position
»	Control port parity disabled	S1/3	On
	Control port parity enabled	S1/3	Off
»	Control port parity set to odd	S1/4	On
	Control port parity set to even	S1/4	Off
»	Control port uses 8 data bits	S1/5	On
	Control port uses 7 data bits	S1/5	Off
»	Control port uses 1 stop bit	S1/6	On
	Control port uses 2 stop bits	S1/6	Off
»	V.35 data port enabled	S1/7	On
	EIA-530 data port enabled	S1/7	Off
»	Alarm reporting output to DCE control port	S1/8	On
	Alarm reporting output to DTE control port	S1/8	Off

CONTROL PORT SPEED SELECTION
Setting		S1/1	S1/2
»	9600bps	On	On
	4800bps	On	Off
	2400bps	Off	On
	1200bps	Off	Off

LINE BUILD OUT SELECTION
Setting		S2	S3
»	0 dB	Off	Off
	-7.5 dB	On	Off
	-15 dB	Off	On
	-22.5 dB	On	On

THUMBWEEL FUNCTION SELECTION
Function	S4	S6	S5
Reset loopback tests	Pushed	Position 0	Not pushed
Reset to factory defaults and switch settings	Pushed for 2 sec.	Position 3	Pushed for 2 sec.
Begin near-end line loopback test	Pushed	Position 4	Not pushed
Begin near-end payload loopback test	Pushed	Position 5	Not pushed
Begin near-end local loopback test	Pushed	Position 6	Not pushed
Begin data near-end terminal loopback test	Pushed	Position 7	Not pushed
Reset IDSU address to 00:00:000	Pushed for 2 sec.	Position 7	Pushed for 2 sec.
Send QRST test code	Pushed	Position 8	Not pushed
Send 3 in 24 test code	Pushed	Position 9	Not pushed
Note:S4 and S6 must always be held for at least one-half of one second for the above functions to take effect.

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
RCV	Green	On	DSU is receiving data from network
RCV	Green	Off	DSU is not receiving data from network
XMT	Green	On	DSU is transmitting data to network
XMT	Green	Off	DSU is not transmitting data to network
FEI	Red	On	Remote is out of PLCP lock
FEI	Red	Blinking	Remote block error detected
FEI	Red	Off	Remote PLCP normal
NEI	Red	On	Local DSU is out of PLCP lock
NEI	Red	Blinking	Local DSU detected a block error
NEI	Red	Off	Local DSU PLCP normal
DATA	Green	On	Valid data signal detected
DATA	Green	Blinking	Network Set, Reset, or Test code detected
DATA	Green	Off	No valid signal detected
CV	Red	On	Code Violation, Frame Sync, or CRC error detected
CV	Red	Off	Error not detected
LOS	Red	On	Loss Of Signal condition detected
LOS	Red	Off	Loss Of Signal condition not detected
OOF	Red	On	Signal is out of frame synchronization
OOF	Red	Off	Signal is not out of frame synchronization
AIS	Red	On	Alarm Indication Signal condition detected
AIS	Red	Off	Alarm Indication Signal condition not detected
YEL	Yellow	On	Remote Yellow Alarm condition detected
YEL	Yellow	Blinking	Local Yellow Alarm condition detected
YEL	Yellow	Off	Yellow Alarm condition not detected
PWR	Green	On	Power is on
PWR	Red	On	Self-test failed
PWR	Green	Blinking	Downloading software
PWR	N/A	Off	Power is off
LOOP	Yellow	On	Local loopback test in progress
LOOP	Yellow	Blinking	Remote loopback test in progress
LOOP	Yellow	Off	Loopback test not in progress
SEND	Yellow	On	Test code being sent
SEND	Yellow	Blinking	Remote loopback test may be in progress but cannot be verified
SEND	Yellow	Off	Test code not being sent
ALM	Red	On	Alarm condition detected and awaiting user intervention
ALM	Green	On	Alarm condition detected; user intervention in progress
ALM	N/A	Off	Alarm condition not detected