Nortel Networks 1050, 1100, 1010 manual Single V.35/X.21 WAN interface card

Appendix A Technical specifications 57

Single V.35/X.21 WAN interface card

The single V.35/X.21 WAN interface card has a single DB28S connector that provides the signals needed to interface to V.35 and X.21 equipment. Figure 26 shows the single V.35/X.21 WAN interface card.

Figure 26 Single V.35/X.21 WAN interface card

CS160011A

You need a DSU/CSU (digital service unit/channel service unit) between the WAN connection and the gateway. You can order a V.35 or X.21 cable from Nortel to attach to the connector. This cable enables the WAN adapter to function as DTE (data terminal equipment).

Table 26 provides the V.35 cable pinouts. Table 27 on page 59 provides the X.21 cable pinouts. (The pair suffix A or B refers to an individual wire within a twisted pair.)

Table 26 V.35 cable pinouts

Standard-wired		Pair number	Special-wired
end 28-pin male	Signal name	and conductor	end 34-pin male	Notes
2	TXDA	pair 1A	P
14	TXDB	pair 1B	S
3	RXDA	pair 2A	R
16	RXDB	pair 2B	T
15	TXCA	pair 3A	Y
12	TXCB	pair 3B	AA
17	RXCA	pair 4A	V
9	RXCB	pair 4B	X
24	SCTEA	pair 5A	U
11	SCTEB	pair 5B	W
4	RTSA	pair 6A	C
19	RTSB	pair 6B	no conn	Note 1

Nortel VPN Router Installation — VPN Router 1010/1050/1100