ADTRAN ISU 2X64 user manual Appendix E, EIA-232 Interface

			Appendix E
		Connector Pinouts
	PIN 13	PIN 1
		FEMALE
	PIN 25	PIN 14	Figure E-1
			EIA-232 Interface
				Table E-A
			EIA-232 Interface
Pin	Name	I/O	Description
1	Shield	I/O	Shield for cable
2	TD	I	Transmitted Data
3	RD	O	Received Data
4	RTS	I	Request to Send
5	CTS	O	Clear To Send
6	DSR	O	Data Set Ready
7	SG	I/O	Signal Ground
8	CD	O	Carrier Detect
9	NC	N/A	No Connection
10	NC	N/A	No Connection
11	NC	N/A	No Connection
12	NC	N/A	No Connection
13	NC	N/A	No Connection
14	NC	N/A	No Connection
..............................	15	TC	O Transmit Clock
16	NC	N/A	No Connection
17	RC	O	Receive Clock
18	NC	N/A	No Connection
19	NC	N/A	No Connection
20	DTR	I	Data Terminal Ready
21	NC	N/A	No Connection
22	RI	O	Ring Indicator
23	NC	N/A	No Connection
24	ETC	I	External Transmit Clock
25	NC	N/A	No Connection
I = Input	O = Output	N/A = Not Applicable

61200051L1-1D ISU 2x64 Dual Port ISDN Service Unit User Manual 119