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RS232 Compact Serial Activity Monitor

Monitor all leads on DB9 and DB25 interfaces.


2 In Stock
Extended Double Diamond™ Warranty Available (3 Additional Year)

*Required field

Product Features

  • Use with the optional Bounce-Back Module to test cable that's already installed.
  • Includes a soft case.
  • Jumpers can be ordered separately.


Tap into and monitor active lines with a data scope.

Tech Specs

CE Approval Yes
Connectors (2) DB25 on each end
Indicators Dual-state LEDs; Red for high, Green for low
Jumpers 6 straight, 2 daisychain
Leads Monitored All 25
Patching Voltage Source +V, -V
Power From the interface; (1) 9-volt battery; required to test cable
Size 0.8"H x 4"W x 3.4"D (2 x 10.2 x 8.6 cm)

* Technical specification weight is the unit weight. It is not the packaged shipping weight. For shipping weight, please contact Black Box customer service at 877-877-2269.


Double Diamond Warranty

Extended 1 Year Warranty Available

Protect your purchase with an additional 1 Year Double Diamond™ warranty!
Cost: $33.17

Extended 3 Year Warranty Available

Protect your purchase with an additional 3 Year Double Diamond™ warranty!
Cost: $66.34


Double Diamond™ Warranty (Standard)

Take the risk out of equipment purchases with the Double Diamond™ Warranty from Black Box Network Services.

The Double Diamond Warranty is our warranty that protects your Black Box® brand products* from accidental damage, including drops, water, and power surges.

The RS-232 Compact Serial Activity Monitor comes with a standard 1 Year Double Diamond™ Warranty (Standard) already included.

During the warranty period, Black Box Network Services will repair or replace your damaged equipment within one week of receipt at NO CHARGE!*

Plus, get an Extended Double Diamond Warranty.

You can also extend your warranty or protect a previously purchased Black Box® brand product** for an additional year—for only 10% of the purchase price! Or, extend your coverage for a full three years for only 20% of the purchase price!

Ordering an extended warranty is easy: When viewing a product in your shopping cart, just select the one or three years of additional coverage in the dropdown menu under “Warranty Options.” For details, contact Customer Service at 724-746-5500.

* Warranty subject to certain exclusions and limitations ** Certain products may not be eligible.

What’s more, we also have a 45-day return policy. Simply call Customer Service for a Return Authorization (RA) number, return your product in new condition and in the original package, and receive a full refund.