13
SHM-B ASYNC
information concerning its DTE/DCE setting. Table 2
gives the EIA-232 pinning of the SHM-B with the
DTE/DCE switch in the DCE position.
Table 2. Pinning with DTE/DCE switch in the DCE position.
PIN NUMBER
SIGNAL NAME
DIRECTION
1
Protective Ground
—————
2
Transmitted Data TD*
To DCE
3
Received Data RD*
From DCE
4
Request to Send (RTS)
To DCE
5
Clear to Send (CTS)
From DCE
6
Data Set Ready (DSR)
From DCE
7
Signal Ground
—————
8
Received Line Signal Detector
From DCE
20
Data Terminal Ready (DTR)
To DCE
*Pins 2 and 3 (TD and RD) can be reversed using the DTE/DCE switch, S1 on the circuit
board. See Section 3.3 for details.
NOTE
Configure each SHM-B independently. Your local and
remote modems won’t necessarily be configured the same.
