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.
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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.
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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.