YCS basics
YCS basics 100 Foot DB9 9 Pin Serial / RS232 Male/Female Extension Cable
Bottom line: The YCS basics 100 Foot DB9 9 Pin Serial / RS232 Male/Female Extension ($29.97 on Amazon as of 2026-10-06): 100 ft length spans rooms, workshops or rack rows in one run; main trade-off: not a null modem; PC-to-PC links need a separate adapter.
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*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Pros & Cons
Pros
- ✓ 100 ft length spans rooms, workshops or rack rows in one run
- ✓ DB9 male-to-female ends extend an existing serial link without gender changers
- ✓ Straight-through pinout keeps your original DTE/DCE wiring intact
- ✓ Suits retro PC modems, switch console cables and serial lab gear
- ✓ Light gray jacket blends into walls and office cable runs
Cons
- ✗ Not a null modem; PC-to-PC links need a separate adapter
- ✗ 100 ft is excessive for desk setups and leaves a bulky coil
- ✗ Long RS-232 runs may need lower baud rates for stable data
- ✗ No USB end; PCs without a COM port need a USB-to-serial adapter
Manufacturer description
The YCS basics 100 Foot DB9 Serial Extension Cable gives your RS-232 equipment room to spread out. It has a DB9 male connector on one end and a DB9 female connector on the other, so you can lengthen a serial link that already works without adding gender changers. The wiring is straight through, pin for pin. It is not a null modem cable. That makes it the right choice when you are extending a connection that already works at short range. Examples include a retro PC talking to an external serial modem, a laptop reaching a network switch's DB9 console cable, or a lab instrument feeding a…
SpecPicks Verdict
SpecPicks scored YCS basics 100 Foot DB9 9 Pin Serial / RS232 Male/Female Extension… using a rating × review-volume × price-fit model applied to published specs and reviews across the cables & connectors category. YCS basics's cables & connectors lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for cables & connectors of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
Is this a null modem cable?
No. The YCS basics cable is wired straight through, so each pin connects to the same pin at the other end. To link two PCs or two DTE devices, add a null modem adapter at one end.
Which end plugs into my device?
The DB9 male end plugs into a female DB9 port or cable. The DB9 female end accepts a male DB9 port or plug. This lets you put the cable between an existing serial cable and the device it connects to.
Can I use it with a modern laptop that has no serial port?
Yes, with a USB-to-serial adapter that has a DB9 connector. Plug the adapter into the laptop and attach the cable end that matches the adapter's connector gender.
Can I extend a network switch console cable with it?
Yes, if your console cable ends in a DB9 connector. Connect the console cable's DB9 female end to this cable's male end, then plug the female end into your computer's male DB9 port or USB-serial adapter.
Will serial data stay reliable over the full 100 feet?
It depends on your equipment and baud rate. Long RS-232 runs are more sensitive at higher speeds. If you see garbled data, lower the baud rate and check your device's documentation for supported cable lengths.
Key Features
- 100 feet long
- Light gray
- One DB9 male connector
- One DB9 female connector
- Straight through (not a null modem cable)
Full Specifications
| Brand | YCS basics |
|---|---|
| Color | Gray |
| Model | LYSB009W996JQ-ELECTRNCS |
| Cable Type | Serial |
| Item Shape | Round |
| Model Name | LYSB009 |
| Unit Count | 1 Count |
| Item Length | 1200 inches |
| Part Number | D9MF100-B |
| Connector Type | DB9 |
| Number of Pins | 9 |
| Number of Items | 1 |
| Special Feature | 28 AWG |
| Connector Gender | Female, Male |
| Specification Met | RoHS |
| Compatible Devices | Modem |
| Indoor Outdoor Usage | Indoor, Outdoor |
| Customer Package Type | sealed anti-static bag |
| Connectivity Technology | Serial Port |
| Recommended Uses For Product | comptuer lab industrial |
Ready to buy?
YCS basics 100 Foot DB9 9 Pin Serial / RS232 Male/Female Extension Cable is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
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