This modular adapter has a DB9 female connector that plugs into DB9 RS232 serial port and converts it to an RJ45 connection. These modular adapters convert from a DB9 to an RJ45 socket jack (female).
eBay
RJ45 Splitter Ethernet LAN Network Adapter RJ45 1 Male to 2/3/4 Female Cable Ports Connector
Aliexpress UK
This modular adapter has a DB9 female connector that plugs into DB9 RS232 serial port and converts it to an RJ45 connection. These modular adapters convert from a DB9 to an RJ45 socket jack (female).
eBay
ZoeRax 2-Pack Female to Female Keystone Jack Wall Plate with RJ45 Keystone Inline Coupler insert,
Aliexpress UK
This modular adapter has a DB9 female connector that plugs into DB9 RS232 serial port and converts it to an RJ45 connection. These modular adapters convert from a DB9 to an RJ45 socket jack (female).
eBay
Dual XLR 3Pin Male To RJ45 Female Audio Network Interface Female To XLR 3pin Female Audio Signal
Aliexpress UK
This modular adapter has a DB9 female connector that plugs into DB9 RS232 serial port and converts it to an RJ45 connection. These modular adapters convert from a DB9 to an RJ45 socket jack (female).
eBay
RS232 Cable to RS-232 DB9F to DB9F male to Female / male DB9 Connector Serial Null Modem cable
Aliexpress UK
DB9 9-Pin RS232 Serial Port Female to RJ45 Male Cat5e Cable 3M.
eBay
D-SUB DB9 DB15 DB25 Male Female Conversion Connector Adapter For LPT 25 Pin COM 9 Pin VGA 15Pin Mini
Aliexpress UK
Connect devices to your networking and enjoy the convenience of data transfer. Due to the differences between different monitors, the picture may not reflect the actual of the item.
eBay
High Quality For Motherboard 9 Pin Female to RS232 DB9 Pin Com Port Ribbon Serial Cable Connector
Aliexpress UK
This modular adapter has a DB9 female connector that plugs into DB9 RS232 serial port and converts it to an RJ45 connection. These modular adapters convert from a DB9 to an RJ45 socket jack (female).
eBay
Mitsubishi Q Series PLC Programming Cable D-sub DB9 Female RS232 Serial to Mini Din 6-pin Cable
Aliexpress UK
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eBay
Custom Pinout D-sub 9 Pin DB9 Female to Mini Din 6 Pin RS232 Serial Communication Cable
Aliexpress UK