3Com 530, 510, 520 manual WAN Port Connecting Cable V.35/V.36 Support

WAN Port Connecting Cable – V.35/V.36 Support

The WAN port terminates with a 25-way D-type female connector. The port can be configured to support V.36 signalling characteristics at data transfer rates up to 48 Kbps. 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.

7

Pin	Signal name	Client end
Links 3Com end		pin no.
pin no.		(34-way MRAC
(25-way male)		connector)
2	Transmit Data (TXD 103)	P
3	Receive Data (RXD 104)	R
4	Request To Send (RTS	C
	105)
5	Clear To Send (RTS 106)	D
6	Data Set Ready (DSR 107)	E

				Interface Cable Characteristics		B-7
Pin				Signal name	Client end
Links 3Com end					pin no.
			pin no.		(34-way MRAC
			(25-way male)		connector)
			7	Signal Ground	B
				(102)(Clear To Send)
	8			Data Carrier Detect (DCD	F
				109)
		11		Signal Ground
13				Serial Clock Transmit B	AA
				(SCTB 114)
14				Transmit Data B (TXDB	S
				103)
15				Serial Clock Transmit A	Y
				(SCTA 114)
16				Receive Data B (RXDB	T
				104)
17				Serial Clock Receive A	V
				(SCRA 115)
19				Serial Clock Receive B	X
				(SCRB 115)
20				Data Terminal Ready (DTR	H
				108)