String to = params.get("callTo").getAsString();
Session toSession = registry.get(to).getSession();
JsonObject icParams = new JsonObject();
params.addProperty("from", name);
JsonObject icResponse = (JsonObject) toSession.sendRequest(
"incommingCall", icParams);
String callResponse = icResponse.get("callResponse").getAsString();
if ("Accept".equals(callResponse)) {