Premier Mounts CDM-600 specifications Data Interface Connector Pin Assignments, Rr B

CDM-600 Satellite Modem	Revision 7
Connector Pinouts	MN/CDM600.IOM

5.4Data Interface Connector (P3B)

The Data Interface connector, a 25-pin D type female, conducts data input and output signals to and from the modem, and connects to customer’s terrestrial equipment, breakout panel, or protection switch. Refer to Table 5-4for pin assignments.

Table 5-4. Data Interface Connector Pin Assignments

Pin #

Generic Signal description

Direction

EIA-422 EIA 530 LVDS

V.35

EIA-232

Circuit #

2	Transmit Data A	DTE to Modem	SD A	SD A	BA	103
14	Transmit Data B	DTE to Modem	SD B	SD B	-	103
24	Transmit Clock A	DTE to Modem	TT A	SCTE A	DA	113
11	Transmit Clock B	DTE to Modem	TT B	SCTE B	-	113
15	Internal Transmit	Modem to DTE	ST A	SCT A	DB	114
	Clock A
12	Internal Transmit	Modem to DTE	ST B	SCT B	-	114
	Clock B
3	Receive Data A	Modem to DTE	RD A	RD A	BB	104
16	Receive Data B	Modem to DTE	RD B	RD B	-	104
17	Receive Clock A	Modem to DTE	RT A	SCR A	DD	115
9	Receive Clock B	Modem to DTE	RT B	SCR B	-	115
8	Receiver Ready A	Modem to DTE	RR A	RLSD *	CF	109
10	Receiver Ready B	Modem to DTE	RR B	-	-	109
23	External Carrier Off	DTE to Modem	-	-	-	-
	(EIA-232 ‘1' or TTL
	‘low’ )
7	Signal Ground	-	SG	SG	AB	102
1	Shield	-	Shield	FG	AN	101
Notes:

1.Receiver Ready is an EIA-232 -level control signal on a V.35 interface.

2.DO NOT connect signals to pins which are not shown - these pins are reserved for use by the redundancy system.

3.‘B’ signal lines are not used for EIA-232 applications.

4.For X.21 operation, use the EIA-422 pins, but ignore Receive Clock if the Modem is DTE, and ignore Transmit clocks if the Modem is DCE.

5.For IDR operation using G.703, this primary interface becomes the 8 kbps EIA-422 overhead channel.

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