Card Type	Modem (synchronous/asynchronous)
Chipset	Unidentified
Maximum Data Rate	128Kbps (64Kbps for V.24)
Data Modulation	Proprietary
Data Bus	Serial

CONNECTIONS
Function	Label	Function	Label
RESET button	BT1	DC power in	CN9
TEST button	BT2	Header to daughterboard J3	J1
Analog Loopback Test button	BT3	Header to interface board J4, J5, or J6	J2
TEST button	BT4	Header to main board J1	J3
Line out via ADO-8 jack	CN1	Header to main board J2	J4
V.24 serial port	CN2	Header to main board J2	J5
DC power in	CN3	Header to main board J2	J6
Line out via ADO-8 jack	CN4	1A fuse	F1
V.35 serial port	CN5	1A fuse	F2
DC power in	CN6	800mA fuse	F3
Line out via ADO-8 jack	CN7	800mA fuse	F4
X.21 serial port	CN8	800mA fuse	F5
Note: The V.24 daughterboard has a maximum line speed of 64Kbps.

USER CONFIGURABLE SETTINGS
Setting	Label	Position
í Serial interface PS2 signal has no effect	S1/1	Off
Serial interface PS2 signal generates remote digital loopback test	S1/1	On
í Serial interface PS3 signal has no effect	S1/2	Off
Serial interface PS3 signal generates analog loopback test	S1/2	On
í Factory configured - do not alter	S1/3	Off
í Factory configured - do not alter	S1/4	Off
í Modem ignores RTS after 10 seconds of synchronization loss	S1/5	On
Modem does not ignore RTS after 10 seconds of synchronization loss	S1/5	Off
í Loopback tests automatically disabled after 20 seconds	S1/6	On
Loopback tests not disabled after 20 seconds	S1/6	Off
í Factory configured - do not alter	S1/7	On
í Factory configured - do not alter	S1/8	Off

S2 TO M2 SIGNAL DELAY AND M5 SIGNAL CONFIGURATION
Delay	M5 Signal	SC1
20 mS	Constant	Position 3
20 mS	Switched	Position 7
30 mS	Constant	Position 2
30 mS	Switched	Position 6
60 mS	Constant	Position 1
60 mS	Switched	Position 5
í Constant	Constant	Position A
Constant	Switched	Position F

M1 SIGNAL CONFIGURATION
Setting	SC2
í Forced high	Position 0
Dependent on remote S1 signal	Position 1
Dependent on line	Position 2
Dependent on remote S1 signal and line	Position 3
Dependent on test	Position 4
Dependent on remote S1 signal and test	Position 5
Dependent on line and test	Position 6
Dependent on remote S1 signal, line, and test	Position 7
Dependent on local S1 signal	Position 8
Dependent on remote and local S1 signals	Position 9
Dependent on line and local S1 signal	Position A
Dependent on remote and local S1 signals and line	Position B
Dependent on test and local S1 signal	Position C
Dependent on remote and local S1 signals and test	Position D
Dependent on line, test, and local S1 signal	Position E
Dependent on remote and local S1 signals, line, and test	Position F
Note: This switch has no function when the X.21 interface board is installed.

CLOCK SOURCE SELECTION
Source	Type	SC3
External	Master	Position 1
í Clock loop	Slave	Position 2
Internal	Master	Position 3

LINE SPEED SELECTION
Synchronous	Asynchronous	SC4
4800bps	N/A	Position 6
8000bps	N/A	Position 7
í 9600bps	N/A	Position 8
16Kbps	N/A	Position 9
19.2Kbps	N/A	Position A
32Kbps	N/A	Position B
38.4Kbps	N/A	Position C
64Kbps	0 to 9600bps	Position D
76.8Kbps	N/A	Position E
128Kbps	0 to 19.2Kbps	Position F

LOOPBACK PATTERN SELECTION
Setting	SC5
í Pattern 0	Position 0
Pattern 1	Position 1
Pattern 2	Position 2
Pattern 3	Position 3

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
ERR	Red	On	Error condition detected
ERR	Red	Blinking	Error condition detected
ERR	Red	Off	Error condition not detected
ON	Green	On	Power is on
ON	Green	Off	Power is off
TXD	Green	Blinking	Modem is transmitting data
TXD	Green	Off	Modem is not transmitting data
RXD	Yellow	Blinking	Modem is receiving data
RXD	Yellow	Off	Modem is not receiving data
RTS	Green	On	RTS signal is high
RTS	Green	Off	RTS signal is low
DCD	Yellow	On	Carrier signal detected
DCD	Yellow	Off	Carrier signal not detected
TEST	Red	On	Self-test in progress
TEST	Red	Off	Self-test not in progress
AL	Red	On	Analog loopback test in progress
AL	Red	Off	Analog loopback test not in progress
RDL	Red	On	Remote digital loopback test in progress
RDL	Red	Off	Remote digital loopback test not in progress