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Black Box

Black Box Pro Switching Gang Switch - 4U, Multimode Fiber ST A/B Card Latching

$1,111.81
$998.17 SAVE $113.64
None availableas of 06/02/2026

Ships when available. Free shipping on most items when you spend $100 or more.

Compliance, certifications and origin

  • TAA compliant
  • Origin: United States
Rated excellent by our customers Read our reviews

Secure checkoutISO 9001:2015 and CMMC certifiedFamily owned since 1982

Free shipping on most items when you spend $100 or more.

Real people answer: chat with us, email customerservice@colamco.com, or call 1-800-692-8757, Monday to Friday, 8am to 5pm EST.

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Secure checkoutISO 9001:2015 and CMMC certifiedFamily owned since 1982

Free shipping on most items when you spend $100 or more.

Real people answer: chat with us, email customerservice@colamco.com, or call 1-800-692-8757, Monday to Friday, 8am to 5pm EST.

Overview

View user manual
  • External Power Supply 100- 240 VAC (SM961-PS)
  • Internal Power Supply -48 VDC (SM760-PS1)
  • Internal Power Supply Dual -48VDC (SM760-PS2)

Then select a Controller Card

  • Ethernet (SNMP) (SM962A)
  • Logic Only (SM964A)

Next, choose your A/B Switch Cards

  • Serial DBxx: DB25 A/B Non-Latching (SM965A)
  • DB9 A/B Non-Latching (SM966A)
  • DB15 A/B Non-Latching (SM967A)
  • Power: 240 VAC 1 in 2 out (SM971)
  • 120 VAC 2 in 1 out (SM973)
  • Video: 75-ohm F-Connector (SM976A)
  • Multimode: SC Latching (SM977A-SC)
  • ST Latching (SM977A-ST)
  • RJ45 Copper: CAT5e Latching (SM978A)
  • CAT6 Latching (SM979A)

This product works with Power Supply (SM961-PS), A/B Switch Cards (SM965A, etc.)

Technical specifications

General Information

Manufacturer Black Box Corporation
Manufacturer Part Number SM977A-ST
Manufacturer Website Address http://www.blackbox.com
Brand Name Black Box
Product Name Pro Switching Gang Switch - 4U, Multimode Fiber ST A/B Card Latching

Physical Characteristics

Product Color Black
Height 3"
Width 8.3"
Depth 9.3"
Weight (Approximate) 14 oz

Miscellaneous

Application / Usage Power Supply
Country of Origin United States
TAA Compliant Yes

Warranty

Limited Warranty 1 Year

Ratings and reviews

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Shipping and returns

Free shipping on most items when you spend $100 or more. In-stock items ship on the next open shipment slot. The buy box above shows the live order-by countdown and the estimated arrival date.

Need to send it back? Start a return online with a Request RMA and our team will take care of you. Keep the original packaging. Items must be returned in the condition received.

Questions about shipping or returns? Chat with us, email customerservice@colamco.com, or call 1-800-692-8757, Monday to Friday, 8am to 5pm EST.