3Com 510, 520, 530 Interface Cable Characteristics, WAN Port Connecting Cable V.11/X.21 Support

Interface Cable Characteristics

WAN Port Connecting Cable – V.11/X.21 Support

The WAN port terminates with a 25-way D-type female connector. The port can be configured to support V.11 signalling characteristics at data transfer rates up to 2.048 Mbps. The WAN port connecting cable is not supplied with the unit. The following signalling characteristics should be observed when purchasing or fabricating a suitable cable.

			Interface Cable Characteristics		B-5
Pin			Signal name	Client end pin
Links 3Com end				no.
		pin no.		(15-way male
		(25-way male)		D-type connector)
2			Transmit Data A (TXDA)	2
3			Receive Data (RXDA)	4
	7		Signal Ground (Receive	8
			Data)
		12	Signal Ground
13			Indicate B (INDB)	12
14			Transmit Data B (TXDB)	9
15			Indicate A (INDA)	5
16			Receive Data B (RXDB)	11
17			Clock A (CLKA)	6
19			Clock B (CLKB)	13
23			Control B (CTRLB)	10
24			Control A (CTRLA)	3