Card Type	Network Termination Unit
NIC Type	E1
Chip Set	Unidentified
I/O Options	BNC connectors (2), auxiliary port (RJ-48), communication port (RJ-48), HDSL network interface via RJ-48 connector, test jacks (6), power jack, 15-pin G.703 DTE port, 25-pin DTE ports (4), clock port
Maximum Transfer Rate	2.048Mbps
Data Bus	External

CONNECTIONS
Function	Label	Function	Label
Test jack - Lp1 HDSL line	CN1	G.703 DTE port (15-pin connector)	CN10
Test jack - Lp2 HDSL line	CN2	HDSL network interface via RJ-48 connector	CN11
Test jack - E1 line in	CN3	DTE port 3 (25-pin serial connector)	CN12
Test jack - E1 line out	CN4	DTE port 4 (25-pin serial connector)	CN13
Test jack - E1 monitor In	CN5	15-pin clock port	CN14
Test jack - E1 monitor out	CN6	DTE port 1 (25-pin serial connector)	CN15
Power Jack	CN7	DTE port 2 (25-pin serial connector)	CN16
Auxiliary port	CN8	BNC connector - receive	RX
Communication port	CN9	BNC connector - transmit	TX

USER CONFIGURABLE SETTINGS
Setting	Label	Position
Open shield connection established	SW1	On
Earth shield connection established	SW1	Off
120ohm balanced network interface selected	SW2	In
75ohm unbalanced network interface selected	SW2	Out
Note: SW1 must be on when using the 120ohm interface

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
OK	Green	On	NTU power is on
OK	Green	Blinking	NTU is downloading software
OK	Green	Off	NTU power is off or detecting a system failure
FAIL	Yellow	On	Device error has been detected
FAIL	Yellow	Off	Device error has not been detected on network
FAIL	Yellow	Blinking	NTU is conducting a self test
TST	Yellow	On	NTU is executing a loopback or pattern test
TST	Yellow	Off	NTU is not executing a test
SIG1	Green	On	NTU is receiving a recoverable signal from network on loop 1
SIG1	Green	Off	NTU cannot recover the signal from network on loop 1
SIG2	Green	On	NTU is receiving a recoverable signal from network on loop 2
SIG2	Green	Off	NTU cannot recover the signal from network on loop 2
OOF	Yellow	On	Out of frame condition detected on network
OOF	Yellow	Off	Out of frame condition not detected on network
ALM	Yellow	On	Alarm condition detected on network
ALM	Yellow	Off	Alarm condition not detected on network

G.703 DTE PORT AND DATA PORT LED(S)
LED	Color	Status	G.703 DTE port	Data port
LED1	Green	On	A recoverable signal is being received from G.703 DTE port	DTR signal is high
LED1	Green	Off	NTU cannot recover the signal from G.703 DTE port	DTR signal is low
LED2	Yellow	On	Out of frame condition detected on G.703 DTE signal	Receiving all ones from the DTE
LED2	Yellow	Off	Out of frame condition not detected on G.703 DTE signal	Receiving all zeros from the DTE
LED2	Yellow	Blinking	N/A	Data is being transferred
LED3	Yellow	On	Alarm condition detected on G.703 DTE signal	Transmitting all ones from the DTE
LED3	Yellow	Off	Alarm condition not detected on G.703 DTE signal	Transmitting all zeros from the DTE
LED3	Yellow	Blinking	N/A	Data is being transferred
LED4	Yellow	On	A pulse density violation was detected (and corrected) on G.703 DTE signal	CTS signal is high
LED4	Yellow	Off	A pulse density violation was not detected on G.703 DTE signal	CTS signal is low
LED5	Yellow	On	A bipolar violation was detected (and corrected) on G.703 DTE signal	RTS signal is high
LED5	Yellow	Off	A bipolar violation was not detected on G.703 DTE signal	RTS signal is low