oh.variable = malloc(100);
        if(oh.variable == NULL) {
                ast_log(LOG_WARNING, "Out of memory\n");
                return NULL;
        }

        snprintf(oh.variable, 100, "_PARKEDAT=%u", lot);

        dchan = __ast_request_and_dial(dialtech, AST_FORMAT_SLINEAR, dialstr,30000, &outstate, chan->callerid, &oh);