Card Type	E3 DSU/CSU
Chip Set	Unidentified
I/O Options	AC power connector, DC power and alarm relay terminal block, 9-pin serial ports (2), DTE port via 25-pin V.35 connector, DTE port via HSSI connector, monitor jack - receive, monitor jack -send, E3 network interface via BNC connectors (2), External clock via BNC connector
E3 Transfer Rate	2.048Mbps
E3 Protocol	PLCP
E3 Line Coding	RZ, HDB3
Frame type	G.751, G.703, G.823
Data Bus	External

CONNECTIONS
Function	Label	Function	Label
BNC external clock connector	CLK	DC power & alarm relay terminal block	CN6
DTE port via HSSI connector	CN1	Monitor jack - send	CN7
DTE port via 25-pin connector	CN2	Monitor jack - receive	CN8
9-pin serial port 1	CN3	Fuse	F1
9-pin serial port 2	CN4	BNC E3 network interface - receive	RCV
AC power connector	CN5	BNC E3 network interface - transmit	XMT

DIAGNOSTIC LEDS (DTE STATUS)
LED	Color	Status	Condition
INS	Green	On	Module is in-service and functioning normally
INS	Yellow	On	Module is functioning normally but is not generating any alarms
INS	Red	On	A controller failure has been detected
NTST	Unidentified	On	Bidirectional DTE/Network loopback test is in progress
NTST	Unidentified	Off	Module is not conducting a bidirectional DTE/Network loopback test
TD	Unidentified	Blinking	Data is being transmitted to the E3 network
TD	Unidentified	Off	Data is not being transmitted to the E3 network
RD	Unidentified	Blinking	Data is being received from the E3 network
RD	Unidentified	Off	Data is not being received from the E3 network
RTS	Unidentified	On	RTS signal is high
RTS	Unidentified	Off	RTS signal is low
CTS	Unidentified	On	CTS signal is high
CTS	Unidentified	Off	CTS signal is low
DTR	Unidentified	On	DTR signal is high
DTR	Unidentified	Off	DTR signal is low

DIAGNOSTIC LEDS (PCLP ALARM STATUS)
RED	Unidentified	On	Out of frame (OOF) conditions detected on received PLCP signal
RED	Unidentified	Off	Out of frame (OOF) conditions not detected on received PLCP signal
YEL	Unidentified	On	Receiving unit in the SMDS fabric is out of frame
YEL	Unidentified	Off	Receiving unit in the SMDS fabric is not out of frame
PAR	Unidentified	On	BIP8 parity errors have been detected in the receive PCLP
PAR	Unidentified	Off	BIP8 parity errors have not been detected in the receive PCLP

DIAGNOSTIC LEDS (E3 NETWORK STATUS)
EINS	Green	On	Module is in-service and functioning normally
EINS	Yellow	On	Module is functioning normally but is not generating any alarms
EINS	Red	On	A module failure has been detected
ALM	Unidentified	On	DSU/CSU is in alarm state
ALM	Unidentified	Off	DSU/CSU is not in alarm state
OOF	Unidentified	On	Loss of signal (LOS) or out of frame (OOF) alarm condition has been detected on E3 receive signal
OOF	Unidentified	Off	Loss of signal (LOS) or out of frame (OOF) alarm condition has not been detected on E3 receive signal
YEL2	Unidentified	On	Out of frame alarm signal detected on far-end equipment
YEL2	Unidentified	Off	Out of frame alarm signal not detected on far-end equipment
AIS	Unidentified	On	Alarm indication signal detected on network
AIS	Unidentified	Off	Alarm indication signal not detected on network
BPV	Unidentified	Blinking	Bipolar violations or HDB3 errors have been detected on E3 network
BPV	Unidentified	Off	Bipolar violations or HDB3 errors have not been detected on E3 network
PAR2	Unidentified	On	BIP8 parity errors have been detected on E3 network
PAR2	Unidentified	Off	BIP8 parity errors have not been detected on E3 network

DIAGNOSTIC LEDS (PROCESSOR STATUS)
RXL3	Unidentified	On	Unit is reassembling an L3_PDU
RXL3	Unidentified	Off	Unit is not reassembling an L3_PDU
RXL2	Unidentified	On	Unit is performing L2 processing on received signal
RXL2	Unidentified	Off	Unit is not performing L2 processing on received signal
TXL3	Unidentified	On	Unit is processing an L3 transmit signal
TXL3	Unidentified	Off	Unit is not processing an L3 transmit signal
TXL2	Unidentified	On	Unit is processing an L2 transmit signal
TXL2	Unidentified	Off	Unit is not processing an L2 transmit signal
Note: Pressing STAT and ENTER buttons simultaniously lights all LEDs to verify lamp functionality