3Com 52x, 32x manual Universal to RS-449/V.36 Direct Connect Cable

2-14CHAPTER 2: OVERVIEW

UNIVERSAL to RS-449/V.36 Direct Connect Cable

This cable connects the UNIVERSAL connector on the bridge/router to the RS-449/V.36 port of an SNA legacy device.

To UNIVERSAL port on bridge/router																				To RS449/V.36 SNA Device
1	2	3	4	5	6	7	8	9	10	11 12		13		14		15	16 17 18 19	1	2	3	4	5	6	7	8	9	10		11	12		13		14	15 16 17 18		19
20	21	22	23 24		25	26	27	28 29		30	31		32		33	34 35 36 37		20	21	22	23	24	25	26	27 28			29	30		31		32 33		34 35	36 37
		37-pin female connector																				RS-449 male connector
				Name						Abbr						Pin				Pin			Abbr					Name

Shield	Shield	1
Request to Send	EIA (A)	7
Request to Send	EIA (B)	25
Transmit Data	SD (A)	4
Transmit Data	SD (B)	22
Receive Data	RD (A)	6
Receive Data	RD (B)	24
Request to Send	EIA (A)	7
Request to Send	EIA (B)	25
Data Mode	DM (A)	11
Data Mode	DM (B)	29
Terminal Ready	TR (A)	12
Terminal Ready	TR (B)	30
Receive Timing	RT (A)	8
Receive Timing	RT (B)	26
Terminal Timing	TT (A)	17
Terminal Timing	TT (B)	35
Terminal Timing	TT (A)	17
Terminal Timing	TT (B)	35
Signal Ground	SG	19
Send Common	SC	37
Receive Common	RC	20

1	Sheild	Shield
9	CS (A)	Clear to Send
27	CS (B)	Clear to Send
6	RD (A)	Receive Data
24	RD (B)	Receive Data
4	SD (A)	Send Data
22	SD (B)	Send Data
13	RR (A)	Receiver Ready
31	RR (B)	Receiver Ready
12	TR (A)	Terminal Ready
30	TR (B)	Terminal Ready
11	DM (A)	Data Mode
29	DM (B)	Data Mode
17	TT (A)	Terminal Timing
35	TT (B)	Terminal Timing
5	ST (A)	Send Timing
23	ST (B)	Send Timing
8	RT (A)	Receive Timing
26	RT (B)	Receive Timing
19	SG	Terminal Timing
37	SC	Send Common
20	RC	Receive Common

Figure 2-11UNIVERSAL to RS-449/V.36 Direct-Connect Cable

3Com does not sell this cable.