This object is to control the debugging level of modem. This control is only available for IAD with RG function. For level 0, the log output is disabled always. For level 1, the log setting is set to default to enable all logs below to logging on and also enable the log out put. Foe level 2, the the log setting is set to default and also enabling verbose mode for more debugging and also enable the log output. So, to use this logging feature for IAD product (with RG), the debug level value should be set to 1 or 2 to enable the log output and then change the setting for each control below to have specific logs. For non-IAD (without RG) product, this OID can only use to control the log output. If its value is zero, then the output is disabled; otherwise, the log output is enabled.