Card Type	T1 CSU/DSU
Chipset	Unidentified
T1 Transfer Rate	56Kbps x 24/64Kbps x 24
T1 Protocol	AMI, B8ZS
Frame Type	D4, SF, ESF
Data Bus	Serial

CONNECTIONS
Function	Label	Function	Label
LEFT button	BT1	T1 line out (Network Interface)	CN3
ENTER button	BT2	T1 line in (Terminal Interface)	CN4
RIGHT button	BT3	Serial control port	CN5
AC power in	CN1	LCD display	LCD
V.35, RS-422, or RS-449 serial data port	CN2	Power switch	SW1
Note:The type of serial port CN2 is determined by which daughtercard is installed in the unit. No further information about the daughtercard is available.

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
RED	Unidentified	On	T1 signal has been out of frame for more than 2.5 seconds
RED	Unidentified	Off	T1 signal has not been out of frame for more than 2.5 seconds
YEL	Unidentified	On	Yellow alarm signal detected
YEL	Unidentified	Off	Yellow alarm signal not detected
AIS	Unidentified	On	All Ones Signal detected
AIS	Unidentified	Off	All Ones Signal not detected
LOS	Unidentified	On	Loss of Signal condition detected for more than 150ms
LOS	Unidentified	Off	Loss of Signal condition not detected for more than 150ms
SES	Unidentified	On	Large quantity of errors detected in the last second
SES	Unidentified	Off	Small quantity of errors detected in the last second

DIAGNOSTIC LED(S) (CON'T)
LED	Color	Status	Condition
T1A	Unidentified	On	Valid signal detected on T1 network interface
T1A	Unidentified	Off	Valid signal not detected on T1 network interface
DTEA	Unidentified	On	Valid signal detected at DTE
DTEA	Unidentified	Off	Valid signal not detected at DTE
DS1A	Unidentified	On	Valid signal detected on T1 terminal interface
DS1A	Unidentified	Off	Valid signal not detected on T1 terminal interface
T1B	Unidentified	On	T1 network interface in test mode
T1B	Unidentified	Off	T1 network interface not in test mode
DTEB	Unidentified	On	DTE in test mode
DTEB	Unidentified	Off	DTE not in test mode
DS1B	Unidentified	On	T1 terminal interface in test mode
DS1B	Unidentified	Off	T1 terminal interface not in test mode