90030500B Installation Page 43
Connecting to modems
You can connect a modem to any available serial port on PortServer II.
1. Obtain a suitable cable to connect the modem to the serial port on PortServer II.
Most modems require a 10-pin cable; we suggest you obtain one of Digi Interna-
tional’s RJ-45 to DB-25 straight-through cables:
This cable type is illustrated below:
Figure 16 Full 10 Wire Modem cable
Note:
Any cable you construct or obtain must be shielded to comply with FCC certi-
fication requirements. The shield must be connected to Chassis Ground
(GND) at one end of the cable.
Table 2 Available Cables
DB-25 Male DB-25 Female DB-9 Male
24 Inch Cables
61020024 61030024 61070024
48 Inch Cables
61020048 61030048 N/A
RJ-45 (10 pin) DB-25 Male
RxD 6 3 RxD
RTS 3 4 RTS
CTS 8 5 CTS
DSR 2 6 DSR
Signal Gnd 7 7 Signal Gnd
DCD 10 8 DCD
DTR 9 20 DTR
RI 1 22 RI
TxD 5 2 TxD
Gnd - Shell Chassis Gnd
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