Black Box 1-800-316-7107

Helping you is our priority at Black Box.

You can contact us by phone, email, fax, or chat for immediate assistance.

We'll call you

A technical expert will call you within 30 seconds.

Submit Connecting call...

Call Us

For Customer Sales & Service and FREE 24/7 Tech Support


We'll respond in 60 seconds or less!

Send us a FAX



Send us an email

We'll answer within 60 minutes!

Email us now
Need Help? Get in touch, 24/7.

We're committed to providing the best customer service in the industry.
We're here for you, 24/7, 365. 

Black Box Brand Product Support 

IT Services & Voice Support 

Or click "Talk With Us" in our top nav to chat with us or to have us call you.


Pocket Opto Source, ST

Provides a light source for testing installed fiber optic cable.

Price: $213.10

Extended Double Diamond™ Warranty Available (3 Additional Year)

Product Features

  • Send a beam of light from your Opto Source down the cable, so someone at the other end can receive the signal in the tester.
  • Works with multimode fiber.
  • Tech Specs

    Output Wavelength 850 n ± 15 nm at ± 3 dBm
    Power Output –20 dBm ±0.5 dBm (100µ-core fiber); –23 dBm ±1 dBm (62.5µ-core fiber); –26 dBm ±1 dBm (50µ-core fiber)
    Readout Range –22 dBm to –40 dBm
    Readout Resolution 2 dBm
    CE Approval Yes
    Connectors (1) ST
    Indicators PWR, Bargraph-style LED in 2-dBm increments
    Power 9-V, supplied by alkaline or nickel-cadmium transistor battery
    Size 4.5“H x 2.3“W x 1“D (11.4 x 5.8 x 2.5 cm)
    NOTE: Fiber testers are for use with glass-core fiber optic cable only.

    NOTE: 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 Double Diamond™ Warranty Available (3 Additional Year) Diamond

    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 Pocket Opto Source, ST comes with a standard 1 Year warranty 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.