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Black Box RS 232 Modem Splitter with RJ 45 Rackmou

Black Box TL421-C

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Manufacturer Part#  TL421-C

Provantage Code:  BABXHV7

Condition:  Factory New

  • Product Type: Signal Splitter
  • Country of Origin: United States
  • Number of Network (RJ-45) Ports: 5
  • TAA Compliant: Yes

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Black Box TL421-C Specifications

    RS 232 Modem Splitter with RJ 45 Rackmou

At a Glance

    Rear View
    • Enables four RS-232 terminal devices to share a single modem.
    • Transmits data received from the modem to all attached terminal devices.
    • Passive, non-powered. Operates transparent to data formats and speeds.
    • Only one terminal device can send data to the modem at a time.
    • transparent to data formats, rates & protocols.
    • RS232 data output by the attached terminal devices is logically OR gated by the modem splitter and then transmitted to the modem.


    Used with the RS-232 Modem Splitter Rackmount Chassis - 2U (TL400A), this splitter makes it easy and affordable for four terminals to share a single modem.

    With this system, 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.

Environmental Certification


Product NameRS 232 Modem Splitter with RJ 45 Rackmou
Manufacturer Part NumberTL421-C
Product TypeSignal Splitter
Number of Network (RJ-45) Ports5
TAA CompliantYes
Environmentally FriendlyYes
Network (RJ-45)Yes
Country of OriginUnited States
Limited Warranty1 Year
WARNING: The plastic used in cable products can expose you to lead and lead compounds, 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.
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Black Box TL421-C