code: public void activateChannels(
              String agentId,
              String placeName
      ) throws WorkspaceApiException {
          this.activateChannels(agentId, null, placeName, null, null);
      }
docs: Activates the voice channel using the provided resources. If the channel is successfully activated,
  Workspace sends additional information about the state of active resources (DNs, channels) via events. The
  resources you provide are associated with the agent for the duration of the session.
  @param agentId The unique ID of the agent.
  @param placeName The name of the place to use for the agent.