Many modern two-way radios have a feature that can allow a supervisor to remotely turn on the transmitter of one of the units of the connected radios. The user of that radio will be automatically put into hands-free communication with the supervisor or with others in the group, possibly with their knowledge. We reported on the vulnerability of this type of feature in a previous post

[here]. The feature has legitimate application for such things as emergency response for medical or safety services. Knowing that the capability exists could lead others to misuse the feature for eavesdropping. 

Workers at the San Francisco Zoo were abusing this capability in their radios. Their misadventures created union trouble with possible legal ramifications. Radios, telephone systems, intercom systems, all have features that can be misused. Employees need to understand proper use of the equipment. If you have such features you may want to consider having them disabled.

 

DTR Monitor mode

Monitor mode, available in many modern two-way radios, can allow eavesdropping.

 

SAN FRANCISCO (CBS SF) — Allegations that upper management at the San Francisco Zoo eavesdropped on employees using a radio communication system as a bugging device has union teamsters demanding the zoo uphold their employees’ right to privacy.

According to Teamsters Local Union 856 representative Tim Jenkins, the San Francisco Zoo’s executive director Tanya Peterson and its vice president of operations Robert Icard both have radios equipped with spyware giving them the capability to listen in on zoo employees’ private conversations without their knowledge.

Jenkins said almost all employees at the zoo were issued the new portable radios around six months ago, but that only two of the radios can be used to eavesdrop on employees as they go about their workday.

He said the radios are equipped with a feature that can pick up conversations that were not intended to be broadcast across radio waves, even as employees speak candidly with co-workers in bathrooms, during lunch breaks or during a phone call with a spouse or medical physician.

Teamsters Local 856 officials claim that this type of “eavesdropping” could be in violation of both state and federal laws and that they are calling for a full investigation.

Peterson said in a statement that the zoo’s recently purchased radios were not intended for listening in on the private conversations of zoo employees.

“Zoo management has no interest in monitoring conversations of its employees,” Peterson said.

She also said that the emergency monitoring function on the new radio system was a vendor feature designed to assist with medical and safety emergencies.

Peterson said that when she was made aware of the radio’s capabilities to listen in on employees, the feature was disabled.

But Jenkins said disabling the emergency monitoring feature is not enough.

The union, which represents about 100 non-managerial employees at the zoo, was approached on March 12 by a whistleblower, identified only as a non-union manager.

The whistleblower contacted a union steward to tell them that he had heard Icard secretly listening in on an employee and making fun of the way that person talked.

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