1.3 (Serial Interfaces)

Question 1

What is DB-9?

Answer 1

DB-9 is an analog 9-pin plug of the D-sub miniature (D-sub) connector plug and socket family for computer and communication devices.

Question 2

What are DB-9’s used for?

Answer 2

1. Used to be for modem connections
2. For RS-232 signals
3. NOW it is used configuration port for switches, routers, firewalls etc

Question 3

How to convert DB-9?

Answer 3

Use a USB to DB-9 converter cable