Appendix A Technical specifications 91
The following table provides the V.90 modem port cable pinouts.
Table 31 MV.90 modem cable pinouts
Pin | Function |
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1 | N/C |
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2 | Tip |
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3 | Ring |
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4 | N/C |
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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 to interface to V.35 and X.21 equipment. The following figure shows the single V.35/X.21 WAN interface card.
Figure 33 Single V.35/X.21 WAN interface card
CS160011A
You need a DSU/CSU 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 data terminal equipment (DTE).
“V.35 cable pinouts” on page 91 provides the V.35 cable pinouts. “X.21 cable pinouts” on page 94 provides the X.21 cable pinouts. (The pair suffix A or B refers to an individual wire within a twisted pair.)
Table 32 V.35 cable pinouts
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| Special- |
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| Pair number | wired end |
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end | Signal name | and conductor | Notes | |
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2 | TXDA | Pair 1A | P |
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14 | TXDB | Pair 1B | S |
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