BLACK BOX
BLACK BOX TL421A MODEM SPLITTER 4 PORT RS232-RJ45 FORMAT
Mfg Part Number: TL421A , Item #: 2568368
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Price: $145.59
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Quantity:
In Stock/Mfg Direct Ship
Last Updated: Jan 14, 2026
No Sales Tax except these states
, PO and Wire.
Featuring multiple ports for splitting modem signals, the compact 4-Port Modem Splitter (RS-232 on RJ-45) makes it easy and affordable for four terminals to share a single modem.
With it, you can avoid the cost of having to purchase and install multiple modems and multiple modem lines.
Plus, it's easy to set up and use. There are no user-configurable switches, jumpers, or settings on the modem splitter. Simply connect the modem and terminal (DTE) devices to it, then power up your modem and terminals as normal.
The splitter's master port connects to your modem using an RJ-45 straight-through cable and the appropriate RJ or DB adapter. Its other ports (Port 1 through Port 4) connect to your DTE terminal devices.
NOTE: Only one terminal device can send data to the modem at a time.
With it, you can avoid the cost of having to purchase and install multiple modems and multiple modem lines.
Plus, it's easy to set up and use. There are no user-configurable switches, jumpers, or settings on the modem splitter. Simply connect the modem and terminal (DTE) devices to it, then power up your modem and terminals as normal.
The splitter's master port connects to your modem using an RJ-45 straight-through cable and the appropriate RJ or DB adapter. Its other ports (Port 1 through Port 4) connect to your DTE terminal devices.
NOTE: Only one terminal device can send data to the modem at a time.
Main Specification
| General Information | |
| Manufacturer | Black Box Corporation |
| Manufacturer Part Number | TL421A |
| Manufacturer Website Address | http://www.blackbox.com |
| Brand Name | Black Box |
| Product Model | TL421A |
| Product Name | 4-Port Modem Splitter |
| Packaged Quantity | 1 |
| Product Type | Signal Splitter |
| Interfaces/Ports | |
| Network (RJ-45) | Yes |
| Number of Network (RJ-45) Ports | 5 |
| Physical Characteristics | |
| Height | 1" |
| Width | 2.2" |
| Depth | 4.3" |
| Weight (Approximate) | 4 oz |
| Miscellaneous | |
| Country of Origin | United States |
| Environmentally Friendly | Yes |
| Warranty | |
| Limited Warranty | 1 Year |
WARNING:: The plastic used in cable products can expose you to lead and lead components,
chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information go to www.P65Warnings.ca.gov
