Asynchronous Cable Connections - NETGEAR XM128 ISDN Reference Manual

Reference Guide for the Model XM128 ISDN Digital Modem
Table F-1. Serial port interface (continued)
ITU-TSS
Pin number
signal name
22 125
24 113
25 142

Asynchronous Cable Connections

Table F-2 provides information about the asynchronous flow control cable connection.
Table F-2. Asynchronous flow control cable connection
Modem Signal
(DCE) DB25
2 TXD
3 RXD
4 RTS
5 CTS
6 DSR
7 Ground
8 CD (DCD)
20 DTR
22 RI
F-2
EIA
Signal/pin description
signal name
CE Ring indicator (RI).
DA Transmit clock signal (source: DTE).
Test indicator.
To PC To DCE
(DTE) DB 9 (Null) DB25
3 3
2 2
7 5
8 4
6 20
5 7
1 20
4 6,8
9
To To NeXT
MAC Mini 8 68,040 Mini 8
3 3
5 5
1 6
2 8
4,8 4
2
1 1
Signal direction
DTE -DCE
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Serial Port Interface