MTM-15 modem/telephone/ISDN Settings and Configuration

CONNECTIONS
Purpose	Location	Purpose	Location
RS-232/422	CN1	Digital loopback switch	DIG
DC power	CN2	Local loopback switch	ANA
Transmit	XMT	Remote digital loopback switch	REM
Receive	RCV	Test switch	PATT
Ground	GND	Reset	RESET

ANALOG LOOPBACK
Setting	JP3
Enabled	Pins 1 & 2 closed
» Disabled	Pins 2 & 3 closed

ASYNCHRONOUS TO SYNCHRONOUS DEVIATION
Setting	SW2/S4
» 12.5%	Off
25%	On

BAUD RATE
Setting	SW1
1.2Kbps	0
2.4Kbps	1
4.8Kbps	2
» 9.6Kbps	3
19.2Kbps	4

BIT STOP
Setting	SW2/S2	SW2/S3
8 bits	Off	Off
9 bits	Off	On
» 10 bits	On	Off
11 bits	On	On

CD SIGNAL
Setting	JP2 Pin 1 & 2	JP2 Pin 3 & 4
CD normal	Open	Closed
» CD forced high	Closed	Open

CHASSIS TO SIGNAL GROUND
Setting	JP5 Pin 1 & 2	JP5 Pin 3 & 4
» Connected	Closed	Open
Disconnected	Open	Closed

CLOCK SOURCE
Setting	JP1/A	JP1/B	JP1/C
» Internal	Closed	Open	Open
External	Open	Closed	Open
Receive	Open	Open	Closed

RECEIVE IMPEDANCE
Setting	JP8 Pin 1 & 2	JP8 Pin 3 & 4
» 600 Ohms	Closed	Open
High	Open	Closed

REMOTE LOOPBACK
Setting	JP4
SQ output	Pins 1 & 2 closed
» Remote loopback	Pins 2 & 3 closed

SYNCHRONOUS/ASYNCHRONOUS SELECTOR
Setting	SW2/S1
» Synchronous	On
Asynchronous	Off

TRANSMISSION LEVEL
Setting	JP6/A	JP6/B	JP6/C	JP6/D	JP6/E
» 0dBm	Closed	Open	Open	Open	Open
-3dBm	Open	Closed	Open	Open	Open
-6dBm	Open	Open	Closed	Open	Open
-9dBm	Open	Open	Open	Closed	Open
-12dBm	Open	Open	Open	Open	Closed

TRANSMIT IMPEDANCE
Setting	JP7 Pin 1 & 2	JP7 Pin 3 & 4
» 600 Ohms	Closed	Open
Low	Open	Closed

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
PWR	Green	On	Power is on
PWR	Green	Off	Power is off
RTS	Yellow	On	Request to Send enabled
RTS	Yellow	Off	Request to Send disabled
TD	Yellow	On	Modem is transmitting steady SPACE
TD	Yellow	Off	Modem is not transmitting data
TD	Yellow	Blinking	Modem is transmitting data
RD	Yellow	On	Modem is receiving steady SPACE
RD	Yellow	Off	Modem is not receiving data
RD	Yellow	Blinking	Modem is receiving data
DCD	Yellow	On	Carrier signal detected
DCD	Yellow	Off	Carrier signal not detected
TEST	Red	On	Modem in test mode
TEST	Red	Off	Modem not in test mode
SQ	Yellow	On	Good line quality
SQ	Yellow	Blinking	Poor line quality
SQ	Yellow	Dim	PATT test failed