User Guide

98 Appendix A Technical specifications
NN46110-318 02.01
Table 32 provides the V.90 modem port cable pinouts.
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 43 on
page 98 shows the single V.35/X.21 WAN interface card.
Figure 43 Single V.35/X.21 WAN interface card
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 to attach
to the connector. With this cable, the WAN adapter can function as DTE (data
terminal equipment).
Table 33 provides the V.35 cable pinouts. Table 34 on page 100 provides the X.21
cable pinouts. (The pair suffix A or B refers to an individual wire within a twisted
pair.)
Table 32 V.90 modem cable pinouts
Pin Function
1N/C
2Tip
3 Ring
4N/C
Table 33 V.35 cable pinouts
Standard-wired
end 28-pin male Signal name
Pair number
and conductor
Special-wired
end 34-pin male Notes
2 TXDA pair 1A P
14 TXDB pair 1B S
CS160011A