Black Box SW928C, SW929C, SW927C, SW925AE, SW926C manual Connecting to Printers, Connecting to Modems

MODULAR SMART SWITCH

IBM AT end	Modular Smart Switch end
9-Pin socket connector	25-Pin socket connector
2	TXD
	2
3	RXD
	3
5	GND
	7
6	DTR
8
	20
	CTS
	5
	4

Figure A-2. IBM AT Serial Cable Pinning.

A.3 Connecting to Printers

Most serial printers provide a standard DB25 connector for serial data. The required cable wiring is shown in Figure A-3. This wiring configuration is suitable for many popular printers such as HP® LaserJet®, QMS, Brother®, and Epson® (with serial-port card).

Modular Smart Switch end	Printer end
25-Pin socket connector	25-pin plug connector
TXD	3
2
RXD	2
3
CTS	20
5
6	5
DTR	6
20
GND	7
7

Figure A-3. Cable Pinout for Serial Printers.

MODULAR SMART SWITCH

A.4 Connecting to Modems

The cable shown in Figure A-4can be used to connect to most standard modems. Do not connect additional lines.

Modular Smart Switch end	Modem
	Printer end
25-Pin socket connector	25--pin plug connector
1	1
2	2
3	3
4	4
5	5
7	7
20	20

Figure A-4. Cable Pinout for Modems.

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