2140 modem/telephone/ISDN Settings and Configuration

Card Type	Modem (synchronous/asynchronous)
Chip Set	Unidentified
Maximum Data Rate	2400bps
Data Bus	External
Data Modulation Protocol	Unidentified

CONNECTIONS
Function	Label		Function		Label
Line out		CN1		Talk/data switch		SW1
Line in		CN2		Power switch		SW2
RS-232/422		CN3		Volume		R1
AC power in		CN4

USER CONFIGURABLE SETTINGS
Setting	Label	Position
í Chassis ground connected to signal ground	JP1	Pins 2 & 3 closed
Chassis ground not connected to signal ground	JP1	Pins 1 & 2 closed
í Transmit level set to -9 (permissive)	JP3	Pins 2 & 3 closed
Transmit level set to programmable	JP3	Pins 1 & 2 closed
í Internal clock source	S2/1	Off
External clock source	S2/1	On
í 511 scrambler disabled	S2/2	Off
511 scrambler enabled	S2/2	On
í 200ms answer-back tone echo suppression enabled	S2/3	On
200ms answer-back tone echo suppression disabled	S2/3	Off
í RTS/CTS synchronization delay set to 150ms	S2/4	On
RTS/CTS synchronization delay set to 25ms	S2/4	Off
í CD signal level set to -30dBm	S2/5	Off
CD signal level set to -45dBm	S2/5	On
í Modem will disconnect immediately on low DTR	S2/6	Off
Modem will disconnect after 60 seconds of low DTR	S2/6	On
í Do not squelch receiver during carrier detection	S2/7	Off
Squelch receiver during carrier detection	S2/7	On
í Auto-answer enabled	S2/8	On
Auto-answer disabled	S2/8	Off
í Wait for dial tone before dialing; comma modifier pause time normal	S3/1	Off
Dial without waiting for dial tone; comma modifier pause time set to 2s	S3/1	On
í Modem will not disconnect when CD and RTS are idle	S3/2	Off
Modem will disconnect after 20 seconds of idle CD and RTS	S3/2	On

HANDSET POLARITY
Setting	JP2
í Normal	Pins 1 & 2, 3 & 4 closed
Reversed	Pins 1 & 3, 2 & 4 closed

COMMAND SET
Setting	S3/3	S3/4
í UDS proprietary	Off	Off
V.25bis Bisync mode	On	Off
V.25bis HDLC mode	Off	On
V.25bis SDLC mode	On	On

DISCONNECT DETECTION TIME
Setting	S4/1	S4/2
í Disabled	Off	Off
8ms disconnect	On	Off
90ms disconnect	Off	On
200ms disconnect	On	On

SPEAKER
Setting	S4/3	S4/4
í On until connection	On	Off
Always off	Off	Off
On 30 seconds after connection	Off	On
Always on	On	On

LINE EQUALIZATION
Setting	S4/5	S4/6
No equalization	Off	On
Normal equalization	Off	Off
í Normal equalization	On	On
Maximum equalization	On	Off

DISCONNECT DETECTION TIME
Setting	S4/7	S4/8
í DSR follows DTR with 120ms delay	On	Off
DSR normal	Off	Off
DSR forced high	Off	On
DSR follows RTS	On	On

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
MR/RI	Red	On	Power is on
MR/RI	Red	Off	Power is off
MR/RI	Red	Blinking	Phone is ringing
TR	Red	On	DTR signal is high
TR	Red	Off	DTR signal is low
RS	Red	On	RTS signal is high
RS	Red	Off	RTS signal is low
CS	Red	On	CTS signal is high
CS	Red	Off	CTS signal is low
CD	Red	On	Carrier signal has been detected
CD	Red	Off	Carrier signal has not been detected
RD	Red	On	Modem is receiving data
RD	Red	Off	Modem is not receiving data
TD	Red	On	Modem is transmitting data
TD	Red	Off	Modem is not transmitting data
Note: The function of PR/TM is unidentified.