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Modem Cables

47 modem cables from Dtech, C2G, StarTech.com and more.

Recommended Modem Cables

Startech.com

Gray, 10 ft

+Cross wired null modem design for direct serial connections
+Female DB9 to male DB25 connectors
+10 ft length for moderate-distance runs
No current price. Check it at the store.
StarTech.com

Gray, 10 ft

+10 ft length for serial connections across a desk or rack
+DB-9 male to female RS232 null modem design
No current price. Check it at the store.
C2G

Gray, 50 ft

+50 ft length for long runs from a phone jack
+Connects phone jack to broadband DSL modems, per the name
+Listed for high speed data transfer
−Long 50 ft length adds bulk to manage
No price recorded yet.
C2G

Beige, 6 ft

+6 ft length for short serial connections
+DB9 female to female null modem design
+RS232 serial connection
−Short 6 ft length limits placement between distant devices
No price recorded yet.
Dtech

Black, 10 ft

+10 foot length for flexible equipment placement
+Male to female design for extending serial connections
+Simple null modem crossover wiring
−Not a modem cable for network connections
No price recorded yet.
Dtech

10 ft

+10 foot length for flexible equipment placement
+Full handshaking with 7 wire crossover
+Male to male design for direct device connections
−Not a modem cable for network connections
No price recorded yet.
Dtech

Black, 15 ft

+15 ft length covers longer distances between devices
+Null modem wiring crosses TX and RX lines
+DB9 female-to-female connectors fit standard RS232 ports
−Female-to-female ends only connect to matching female ports
No price recorded yet.
Dtech

Black, 5 ft

+5 ft length suits short connections between nearby devices
+Null modem crossover wiring connects TX and RX lines
+DB9 female-to-female connectors fit standard RS232 ports
−Female-to-female ends only connect to matching female ports
No price recorded yet.
Dtech

Black, 6 ft

+6 ft length offers moderate reach between devices
+Cross TX/RX wiring supports data communication
+DB9 female-to-female connectors fit standard RS232 ports
−Female-to-female ends only connect to matching female ports
No price recorded yet.
Dtech

Black, 1.5 ft

+Short 1.5 ft length for close equipment connections
+Female to female DB9 connectors
+Null modem crossover wiring
−Only 1.5 ft long limits reach
No price recorded yet.
Dtech

Black, 10 ft

+10 ft length provides room for flexible equipment placement
+Null modem wiring uses crossed TX and RX lines
+DB9 male-to-male connectors fit standard RS232 ports
−Without handshake lines, some setups may need extra configuration
No price recorded yet.
Dtech

Black, 5 ft

+5 ft length suits short connections between nearby devices
+Null modem wiring crosses TX and RX lines
+DB9 male-to-male connectors fit standard RS232 ports
−Without handshake lines, some setups may need extra configuration
No price recorded yet.
Dtech

Black, 15 ft

+Long 15 ft length for distant equipment
+Male to male DB9 connectors
+Null modem crossover with TX and RX lines crossed
−Lacks full handshaking, only 2 pins crossed
No price recorded yet.
Epson

Beige, 6 ft

+6 ft length suits desktop printer setups
+DB-9 female to DB-25 male connectors
+Null modem serial wiring
−Shorter 6 ft length limits placement
No price recorded yet.
Letotech

Green, 5.9 ft

+5.9 ft length for desk-side connections
+USB 2.0 to DB9 female connection
+Cross-wired null modem pinout
−Green color is an unusual choice
No price recorded yet.
StarTech.com

Black

+Cross wired RS232 null modem design for serial connections
+DB-9 connectors on both ends
+1 m length suits nearby devices
−Short 1 m length limits placement between distant devices
No price recorded yet.
Tripp Lite

Black, 6 ft

+Serial RS232 null modem cable for direct device connections
+DB9 to DB25 female-to-male connectors for mismatched ports
+6-foot length for short runs between nearby equipment
−Only suits serial RS232 connections, not standard network cabling
No price recorded yet.
Tripp Lite

Black, 10 ft

+Serial RS232 null modem cable for direct device connections
+DB9 female-to-female connectors for linking two serial devices
+10-foot length for reaching across a bit more space
−Only suits serial RS232 connections, not standard network cabling
No price recorded yet.
Tripp Lite

Black, 6 ft

+USB-C to RJ45 design connects laptops directly to serial ports
+Rollover wiring for console access to Cisco modems and routers
+6-foot length for reaching nearby networking equipment
−Requires a USB-C port on the computer to connect
No price recorded yet.
Hoqqf

Black, 5 ft

+Two-pack gives two 5 ft cables
+Short 5 ft length suits close equipment connections
+Male to male straight wiring for both data connections
No price recorded yet.
Ayagroup

Beige, 6 ft

+6 ft length for connecting nearby serial devices
+DB9 female to DB25 male connectors listed
+Null modem design for direct device-to-device serial links
No price recorded yet.
Beszin

Gold, 25 ft

+25 ft length for reaching a phone jack from a distant modem
+Shielded construction for DSL data transfer
+RJ11 connectors for DSL modem connections
No price recorded yet.
C2G

Beige, 6 ft

+6 ft length for connecting nearby serial devices
+DB25 male to DB9 female connectors listed
+Null modem design for direct device-to-device serial links
No price recorded yet.
C2G

Black, 15 ft

+15 ft length for longer serial connections
+Male and female DB9 connectors listed
+Null modem design for direct device-to-device serial links
No price recorded yet.
Cable Leader

25 ft

+DB9 female to DB25 male null modem connection
+Twenty-five foot length for distant equipment
+Sold as a single pack
No price recorded yet.
CablesAndKits

Black, 6 ft

+6 ft length for console connections to Cisco routers
+DB25 to RJ45 connector pairing for console use
+Compatible with Cisco part 72-3663-01
No price recorded yet.
CableWholesale

Beige, 6 ft

+DB9 male to DB9 female serial connection
+Six foot length for close equipment placement
+Eight conductor construction
No price recorded yet.
CableWholesale

Beige, 10 ft

+10 ft length for serial connections between devices
+DB9 male to DB9 female connectors
+8 conductor construction
No price recorded yet.

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Spec scores, pros and cons, and prices are explained in the How it works section of the About page.