null
Inmac

Inmac 1901 Clear Signal T-Switch Serial A/B Switch 2-Device DB25 RS-232

(No reviews yet) Write a Review
SKU:
47176
MPN:
1901
Condition:
Used
Availability:
Usually ships within 1-2 business days.
Weight:
3.00 LBS
Shipping:
Calculated at Checkout
  • Inmac 1901 Clear Signal T-Switch serial A/B switch – front view showing rotary A/B selector knob and Inmac branding
  • Inmac 1901 T-Switch rear panel showing DB25 port A, DB25 port B with adapter, and DB25 Common port labeled
  • Inmac 1901 label showing product number 1901, 2DEV 25P T-SW, serial number A10E76, Made in USA, Santa Clara CA
  • Inmac 1901 Clear Signal T-Switch front panel – side angle showing yellowed plastic housing and rotary switch
  • Inmac 1901 rear panel close-up showing DB25 port A, DB25 port B, and DB25 Common connector positions
$20.00
Was: $40.00
Current Stock: 1

Sold Out

Description

Inmac 1901 Clear Signal T-Switch Serial A/B Switch 2-Device DB25 RS-232

Manual rotary A/B switch for routing serial RS-232 data between two devices and one common port. Routes one input to one of two outputs via 25-pin DB25 connectors.

Specifications & What's Included

  • Brand: Inmac | Model: 1901 | Product Line: Clear Signal
  • Type: Serial A/B Data Transfer Switch
  • Connector Type: DB25 (25-pin) RS-232
  • Configuration: 3 ports (A, B, Common)
  • Switching Method: Manual rotary knob
  • Form Factor: Desktop
  • Unit only; no cables included

Applications

Serial A/B switches were standard infrastructure in telecom and data centers for connecting multiple devices to a single serial port or vice versa. Used with modems, terminals, printers, plotters, and control equipment requiring RS-232 connections. Compatible with any RS-232 serial equipment using DB25 connectors. Typically found in legacy industrial automation, telecommunications equipment, and mainframe environments.

Condition: Used
This Inmac 1901 Clear Signal T-Switch serial A/B switch has been inspected and appears to be in good condition. It was pulled from a working environment where it was previously in use. The plastic housing shows the yellowing typical of this era of equipment, and there is light surface wear consistent with normal use. All three DB25 ports (A, B, and Common) are present and intact, and the rotary A/B selector knob turns freely. Please view our photo set and contact us if you have any questions.
View AllClose

Warranty Information

We stand behind every item we sell with a 30-day money-back guarantee. If your item arrives not as described, you may return it within 30 days for a full refund. Please inspect your purchase upon arrival and contact us with any questions.
View AllClose

Additional Information

Brand:
Inmac
Model:
1901
MPN:
1901
Type:
Serial A/B Data Transfer Switch
SKU:
47176
Number of Devices:
2
Switch Configuration:
A/B (T-Switch)
Connector Type:
DB25 (25-pin)
Interface:
RS-232 Serial
Number of Ports:
3 (A, B, Common)
Switching Method:
Manual rotary knob
Form Factor:
Desktop
Country/Region of Manufacture:
United States
Product Line:
Clear Signal
Division:
Data Com Division
Seller Notes:
Unit only; no cables included. Inspected and pulled from a working environment.
Condition Notes:
Inmac 1901 Clear Signal serial A/B switch inspected and in good condition. Pulled from a working environment. Housing shows age-related yellowing and light surface wear. All DB25 ports intact; rotary selector knob operates freely.
View AllClose