Black Box ME800A-R2, Short-Haul Modem B, ME810 Pinning with DTE/DCE switch in the DCE position

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.

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