NETGEAR XM128 ISDN - Manual (Page 144)

Reference Guide for the Model XM128 ISDN Digital Modem
F-2 Serial Port Interface
Asynchronous Cable Connections
Table F-2 provides information about the asynchronous flow control cable connection.
22 125 CE Ring indicator (RI). ‹
24 113 DA Transmit clock signal (source: DTE). ?
25 142 Test indicator. ‹
Table F-2. Asynchronous flow control cable connection
Modem
(DCE) DB25 Signal To PC
(DTE) DB 9 To DCE
(Null) DB25 To
MAC Mini 8 To NeXT
68,040 Mini 8
2 TXD 3 3 3 3
3 RXD 2 2 5 5
4 RTS 7 5 1 6
5 CTS 8 4 2 8
6 DSR 6 20
7 Ground 5 7 4,8 4
8 CD (DCD) 1 20 2
20 DTR 4 6,8 1 1
22 RI 9
Table F-1. Serial port interface (continued)
Pin number
ITU-TSS
signal name EIA
signal name
Signal/pin description
Signal direction
DTE -DCE