Nokia phone can support three protocols of transmission over cable:
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M2BUS (called often simply MBUS) - 9600,N,...
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FBUS - 115200
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AT mode - 19600
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You cable can support each of them...and phone must be compatible with it
+(for example, CAN'T use DLR-3 with phone, which show "headset connected"
+after connecting it)...
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Schematics
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Simple M2BUS (only) cable:
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Note:
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74HC04 must be in HC version
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Dioda Zenera 3,2 V it required for phones different than 21xx, 3110
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FBUS cable:
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Switch for M2BUS/FBUS for cable above:
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Cable for AT mode is unavailable here, because it needs programmed chip
+and I don't know, what programm should be inside...
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To make FBUS/MBUS cable you have to connect:
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FBUS - GND, TX and RX
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M2BUS - MBUS and GND
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Phone connectors
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What are original cables for Nokia phones ?
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DAU-3 (or DAU-3H) - cable for Nokia series 2100.
+Sell with Nokia Cellularware (it isn't produced now).
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+DAU-4S - cable for Nokia 3110 and all models in series 8100 (8110, 8110i, 8148 and 8148i).
+Sell with Nokia Cellularware (it isn't produced now).
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+DAU-4F - uniwersal (FBUS/M2BUS) cable without switch,
+for Nokia 3110 and all models in series 8100 (8110, 8110i, 8148 and 8148i).
+Sell with Nokia Cellular Data Suite 1.0 (it isn't produced now).
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+DAU-9P - uniwersal (FBUS/M2BUS) cable without switch, for Nokia 51x0/61x0.
+Sell with Nokia Cellular Data Suite 1.2 - 3.0a.
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+DLR-1 - cable sell with Nokia 9000 Communicator. It can be used
+to exchange date between phone and computer and installing software into phone.
+It's M2BUS cable.
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+DLR-2 - cable sell with Nokia 9110 Communicator. It can be used
+to exchange date between phone and computer and installing software into phone.
+It's M2BUS cable, but can't be used with programs working with this protocol (needs
+some small changes - after them will not work original Communicator programms).
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+DLR-3 and DLR-3P - cables for Nokia 7110/6210. Supports AT mode and FBUS.
+FIXME: MBUS too ?
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Can I use DLR-3 cable with my phone ?
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See post from gnokii maillist:
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The dlr-3 CAN'T work with the older phones. this is because the
+converter in the cable is powered by the phone. this is done by the
+phone by raising the !mic-gnd! pin to vcc. if the cable doesn't
+repond on the mbus after 1 second, the power is dropped. a older
+phone doesn't do this, so the converter is unpowered.
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To decide if a phone needs a dau-9 (the old one, powered by pc) or
+the new one (dlr-3) simply connect a dlr-3 to the phone. if the
+phone says "headset connected" it isn't capable of using a dlr-3
+and you have to change to a dau-9.
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Page created from materials from www.fkn.pl
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