Card Type	T1 CSU
Chip Set	Unidentified
I/O Options	AC power connector, power switch, serial port, T1 network interface via RJ-48 connector (2), Alarm relay terminal block, palmtop port via RJ-12 connector (2), data port via 44-pin connector (4)
Wiring Type	RJ-48 shielded twisted pair
T1 Transfer Rate	1.544Mbps
T1 Protocol	AMI, B8ZS
Frame type	D4, ESF
Data Bus	External

CONNECTIONS
Function	Label	Function	Label
AC power connector	CN1	44-pin DTE port 3	CN7
Serial port	CN2	44-pin DTE port 4	CN8
44-pin DTE port 1	CN3	RJ-48 network interface - line 1	CN9
RJ-12 palmtop connector	CN4	RJ-48 network interface - line 2	CN10
RJ-12 palmtop connector	CN5	Alarm relay terminal block	CN11
44-pin DTE port 2	CN6	Power	SW1

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
PW	Green	On	Power is on
PW	Green	Off	Power is off
ER	Red	On	Self test in progress
ER	Red	Blinking	Device is not functional due to fault or error
ER	Red	Off	Device is functional
P1	Green	On	Channel 1 is active
P1	Green	Blinking	CSU is in diagnostic mode. BERT, auto-BERT, remote loopback, or local loopback test in progress
P1	Green	Off	Channel 1 is inactive
P2	Green	On	Channel 2 is active
P2	Green	Blinking	CSU is in diagnostic mode. BERT, auto-BERT, remote loopback, or local loopback test in progress
P2	Green	Off	Channel 2 is inactive
P3	Green	On	Channel 3 is active
P3	Green	Blinking	CSU is in diagnostic mode. BERT, auto-BERT, remote loopback, or local loopback test in progress
P3	Green	Off	Channel 3 is inactive
P4	Green	On	Channel 4 is active
P4	Green	Blinking	CSU is in diagnostic mode. BERT, auto-BERT, remote loopback, or local loopback test in progress
P4	Green	Off	Channel 4 is inactive
LS1	Red	On	Loss of synchronization detected on network line 1
LS1	Red	Off	Loss of synchronization not detected on network line 1
RA1	Red	On	Improper receive signal or no signal detected on network line 1
RA1	Red	Off	Improper receive signal or no signal detected on network line 1
1S1	Yellow	On	Blue alarm condition detected. All ones (AIS) received from network
1S1	Yellow	Off	Blue alarm condition not detected on network line 1
RL1	Yellow	On	Device in line 1 loopback diagnostic mode
RL1	Yellow	Off	Device not in line 1 loopback diagnostic mode
LL1	Unidentified	Off	Not used
LA1	Green	On	Link is active on line 1
LA1	Green	Blinking	Device unable to establish line 1 communications, possible configuration error
LA1	Green	Off	Link is inactive
LS2	Red	On	Loss of synchronization detected on network line 2
LS2	Red	Off	Loss of synchronization not detected on network line 2
RA2	Red	On	Improper receive signal or no signal detected on network line 2
RA2	Red	Off	Improper receive signal or no signal detected on network line 2
1S2	Yellow	On	Blue alarm condition detected. All ones (AIS) received from network
1S2	Yellow	Off	Blue alarm condition not detected on network line 2
RL2	Yellow	On	Device in line 2 loopback diagnostic mode
RL2	Yellow	Off	Device not in line 2 loopback diagnostic mode
LL2	Unidentified	Off	Not used
LA2	Green	On	Link is active on line 2
LA2	Green	Blinking	Device unable to establish line 2 communications, possible configuration error
LA2	Green	Off	Link is inactive. Line 2 disabled