Card Type	E1 CSU/DSU
Chip Set	TI TMS320C51
I/O options	MVIP bus, serial port
Processor	80386SX
Processor Speed	25MHz
Maximum Transfer Rate	2.048Mbps
Maximum Onboard Memory	4MB DRAM/256KB SRAM
Data Bus	16-bit ISA
Data Modulation Protocol	HDB3, AMI

CONNECTIONS
Function	Label	Function	Label
75ohm line in	J2	DSP daughterboard	JP7
75ohm line out	J3	Mini-ISA daughterboard	JP8
MVIP bus	JP5	RS-232 port (see pinout below)	JP20

JP20 PINOUT
Pin	Function
1	Ground
2	Transmit
3	Receive
4	Ground

DRAM
Size	Bank 0	Bank 1
2MB	(4) 1M x 4	NONE
4MB	(4) 1M x 4	(4) 1M x 4

BASE I/O ADDRESS (FIRST DIGIT)
Setting	S1/1	S1/2	S1/3
0 xxx h	On	On	On
2 xxx h	Off	On	On
4 xxx h	On	Off	On
6 xxx h	Off	Off	On
8 xxx h	On	On	Off
A xxx h	Off	On	Off
C xxx h	On	Off	Off
E xxx h	Off	Off	Off

BASE I/O ADDRESS (LAST THREE DIGITS)
Setting	S1/4	S1/5	S1/6
x 100h	On	Off	Off
x 180h	Off	On	Off
x 1A0h	Off	Off	On
x 1C0h	Off	On	On
x 280h	On	On	Off
x 2A0h	On	Off	On
x 2C0h	On	On	On
x 340h	Off	Off	Off

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
D1	Red	On	MVIP processor request in progress
D1	Red	Off	MVIP processor request not in progress
D1	Green	On	MVIP processor grant in progress
D1	Green	Off	MVIP processor grant not in progress
D2	Red	On	Task processor 1 request in progress
D2	Red	Off	Task processor 1 request not in progress
D2	Green	On	Task processor 1 grant in progress
D2	Green	Off	Task processor 1 grant not in progress

DIAGNOSTIC LED(S) (CON’T)
LED	Color	Status	Condition
D3	Red	On	Task processor 2 request in progress
D3	Red	Off	Task processor 2 request not in progress
D3	Green	On	Task processor 2 grant in progress
D3	Green	Off	Task processor 2 grant not in progress
D4	Red	On	Task processor 3 request in progress
D4	Red	Off	Task processor 3 request not in progress
D4	Green	On	Task processor 3 grant in progress
D4	Green	Off	Task processor 3 grant not in progress
D5	Red	On	Task processor 4 request in progress
D5	Red	Off	Task processor 4 request not in progress
D5	Green	On	Task processor 4 grant in progress
D5	Green	Off	Task processor 4 grant not in progress
D6	Red	On	Task processor 5 request in progress
D6	Red	Off	Task processor 5 request not in progress
D6	Green	On	Task processor 5 grant in progress
D6	Green	Off	Task processor 5 grant not in progress
D7	Red	On	Task processor 6 request in progress
D7	Red	Off	Task processor 6 request not in progress
D7	Green	On	Task processor 6 grant in progress
D7	Green	Off	Task processor 6 grant not in progress
D8	Red	On	Processor is reset
D8	Red	Off	Processor is not reset
D8	Green	On	SRAM is busy
D8	Green	Off	SRAM is not busy
D9	Red	On	Processor is transmitting data
D9	Red	Off	Processor is receiving data
D9	Green	On	Host is reading/writing to SRAM
D9	Green	Off	Processor is reading/writing to SRAM
D10	Red	On	DSP chips are reset
D10	Red	Off	DSP chips are not reset
D11	Yellow	On	Yellow alert status has occurred
D11	Yellow	Off	Yellow alert status has not occurred
D12	Red	On	Red alert status has occurred
D12	Red	Off	Red alert status has not occurred
D13	Green	On	Diagnostics are being performed
D13	Green	Off	Diagnostics are not being performed
D14	Green	On	T1 signal detected
D14	Green	Off	T1 signal not detected