2N - VoiceBlue Litemodule or a SIM card is absent, the red LED remains lighted. If aGSM module is not supplied, the respective GSM LED is blinkingred. Upon a correct GSM module initialisation, the SIM card islogged in, which is signalled by a quickly blinking green LED. Ifthe log-in has been successful, the LED goes out. If not, it shinesred continuously.In normal operation, a continuous green LED indicates anincoming or outgoing call within the particular GSM module.19VoIPon www.voipon.co.uk sales@voipon.co.uk Tel: +44 (0)1245 808195 Fax: +44 (0)1245 808299