Card Type	T1 CSU/DSU
Chip Set	Unidentified
I/O Options	25-pin serial port (RS-232), power, network interface via RJ-48
T1 Transfer Rate	1.544Mbps
T1 Protocol	AMI, B8ZS
Frame type	D4, ESF
Data Bus	External

CONNECTIONS
Function	Label	Function	Label
DTE/DCE serial port (25-pin connector)	CN1	Power connector	CN3
Network interface via RJ-48 connector	CN2
Note: 2711 also available with a 34-pin male connector for V.35 interface

USER CONFIGURABLE SETTINGS
Setting		Label	Position
»	ESF/B8ZS framing and coding enabled	SW1/4	Off
	D4/AMI framing and coding enabled	SW1/4	On
»	64Kbps DSO rate	SW1/5	On
	56Kbps DSO rate	SW1/5	Off
»	Transmit clock derived from receive line signal	SW1/6	Off
	Transmit clock generated internally	SW1/6	On

DATA RATE
n x56		n x64	SW1/1	SW1/2	SW1/3
	Clear channel (unstructured)	Off	Off	Off
	112Kbps	128Kbps	On	Off	Off
	224Kbps	256Kbps	Off	On	Off
	336Kbps	384Kbps	On	On	Off
	448Kbps	512Kbps	Off	Off	On
	672Kbps	768Kbps	On	Off	On
	896Kbps	1.024Mbps	Off	On	On
»	1.344Mbps	1.536Mbps	On	On	On

LINE BUILD
Net build		SW1/7	SW1/8
»	0dB	Off	Off
	-7.5dB	On	Off
	-15dB	Off	On
	-22.5dB	On	On

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
TXD	Green	On	DTE is transmitting data to CSU/DSU
TXD	Green	Off	DTE is not transmitting data to CSU/DSU
RXD	Green	On	DTE is receiving data from CSU/DSU
RXD	Green	Off	DTE is not receiving data from CSU/DSU
LOS	Red	On	Loss of signal or loss of frame condition detected on network
LOS	Red	Off	Loss of signal or loss of frame condition not detected on network
ALM	Red	On	Alarm condition detected on network
ALM	Red	Off	Alarm condition not detected on network
ERR	Red	On	Error second (ES) detected on received configuration information
ERR	Red	Off	Error second (ES) not detected on received configuration information
TST	Yellow	On	Device is conducting a loopback test
TST	Yellow	Off	Device is not conducting a loopback test
PWR	Green	On	Power is on
PWR	Green	Off	Power is off