Replacement of Push-Button Switches in Legacy Products


This article discusses the push-button switches found in the following Legacy Telos-branded products:

  • Desktop Director
  • Call Controller
  • Console Director
  • Zephyr Classic
  • Zephyr Express
  • TWO-x-12
  • Series 2101 Studio I/O
  • ABS Switch Console (ONE-x-Six, DIM, & 1A2)


The switches used in these products very suddenly became unavailable during the products' production spans. (the switch mfg. factory burned down) Unfortunately, there were no direct replacements available and alternatives had different terminal locations. Therefore, the PC boards housing them were re-designed and there are two versions in the field. This article will help you determine which type of switch your product has and what you need to do to replace them.

Determining Switch Type

You can immediately tell which type of switch is used in your device by pulling the switch cap off of the switch. This reveals the actuator, which is shaped like a plus sign (+). The color of this actuator (or the absence of the "+" shaped actuator) is the giveaway:

Old Style Switch:

A yellow or white '+' shaped actuator (depicted below) means you have the older (unavailable) style switches.

New Style Switch with Adapters:

The newer switches from Cherry need to use an adapter to accept the button cap. The adapter is either black or grey (depicted below).

New Style Switch with Adapter Removed:

The adapter may come off of the switch and remain inside the button cap. This reveals the native actuator for the new style switch. It looks like this:

Ordering Replacements

Please contact us for availablity of parts. Here are the Telos part numbers:

  • 1211-­00031 - Cherry Switch
  • 1453­-00015 - Adapter for Cherry Switch

These can be purchased directly from us or through your favorite Telos dealer.

If you have the older style switches, it will be best to replace the PC board with the more recent Cherry version. The circuit board will come complete with all newer style switches installed.

Contact our support team at for information. Please have the model or serial number of your product handy when you do this.

A Limited Quantity?

If you have the older switches and you need to replace a one or two, contact us and ask if we have any. Sometimes we can remove some from scrapped units if any are present.

DISCLAIMER: Keep in mind that you'll still have switches left on the board that may fail in the future and that the switches we might be able to provide are NOT NEW and may be untested.

Let us know how we can help

If you have further questions on this topic or have ideas about how we can improve this document, please contact us.

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