This is quality DB9 Male Connector that with solder tail package. DB9 connector is widely used for serial communication RS232, RS485 and RS422 interface.
RS232 DB9 Pinout Diagram
RS-232 Maximum Cable Length
The maximum cable length for RS-232 is 50ft, but in practise depends on baud rate, cable specific capacitance and ambient noise. The table below contains some rules-of-thumb from experiments done by Texas Instruments years ago.
| Baud rate | Maximum range / cable length |
|---|
| 19200 | 50ft |
| 9600 | 500ft |
| 4800 | 1000ft |
|
The DB9 Female Connector For RS232/RS422/RS485 is also available.