The RS-232 connector supports full protocol and 9 PIN standard M (Options). (TIA/EIA-562). You have to select 19200 bps as RS-232 interface speed. For further information, see the Nokia 6090 webpage: 6. Select Send and press M (OK) or select Save to store the http://www.nokia.com.
GSM900 antenna. Handsfree can also be provided by using the audio line out • Connect only the 6090 handset to the system connector as signal of the 6090 in combination with an appropriate FM shown in the installation picture.
The SIM card also contains security-related information. The Nokia 6090 contains two SIM cards: one in the handset, a plug-in SIM card, and a larger one in the phone unit: the IC-1 card. The cards differ solely in size.