The simplest way to connect a modem to a Digi RJ-45 jack is to use a Digi RJ-45 to DB-25 Cable Adapter. The following table shows how to apply the adapter wiring scheme to custom modem cables.
| RJ-45 (Digi End) |
DB-25 Male (Modem End) |
|||
|---|---|---|---|---|
| Signal | Pin | Pin | Signal | |
|
RI |
1 |
connected to |
22 |
RI |
|
DSR |
2 |
connected to |
6 |
DSR |
|
RTS |
3 |
connected to |
4 |
RTS |
|
GND |
4 |
connected (via shield) to |
1 (or shell) |
GND |
|
TxD |
5 |
connected to |
2 |
TxD |
|
RxD |
6 |
connected to |
3 |
RxD |
|
SG |
7 |
connected to |
7 |
SG |
|
CTS |
8 |
connected to |
5 |
CTS |
|
DTR |
9 |
connected to |
20 |
DTR |
|
DCD |
10 |
connected to |
8 |
DCD |