Selfmade Nokia DLR-3P Datacable (atrox)

A thousend thanks to:

• "omolas" probably the first analysis of the DLR-3 cable
• Marcelo Puhl (email only) for sharing his knowladge about MBUS with me.
• N. Hüttisch aka nobbi

These cables has been tested with

• 6210
• 7110

• 3280
• 6160i
• 6162i
• 6161i
• 6185 / 6185i
• 5185i
• 5165i
• 7160
• 7190

THE FIRST VERSION

The first Version does not support any flowcontrol but the rest works perfectly. You can make data connections with your favorite Terminal-Program or even surf the Internet, when you disable Hardware-Handshake(RTS/CTS) in the Dialup/Modem-Properties! All you need is:

• 4x 100 nF (ceramic)
• 3x 1K Resistors
• 1x 100 Ohm Resitor
• 1x 15K Resistor
• 1x BAT-41 Schottky-Diode
• 1x 8 Mhz resonator or a 8 Mhz Quarz + 2x 20 pF
• 1x max3232 level-Shifter with charge-pump
• 1x PIC16F84 microprocessor
• 1x Sub-D 9 Connector and a 3 wire Cable
• 1x Phone Connector and a 7 wire Cable
• a HEX-File with the a PIC-program (© Copyright 2001 Adrian Dabrowski)
• The debug-LED with the 1K resistor is optional (heartbeat)

• Description of the phone connector can be found here.
• Description of the Sub-D Connector. Watch out! Pin numbers in the circuit diagram are correct, but the SUBD9-Symbol isn't!
• For a description of the MBUS-Protocol look into the MBUS-Section.
• If you connect RTS and CTS at the Sub-D Connector, this cable will also work with Logomanager.

THE SECOND VERSION

This version of my data cable supports CTS (so the phone won't be flooded with to much data at once), and DCD because some programs need this, to work properly. A downside, however, is that you need two max3232 or ADM3202 (or one max3237 which is only available as SMD) As a result this circuit works with the "6210 Cable" Standard-Driver from your Nokia-CD without any changes in the "properties" dialogebox! It also has been tested with Logomanager, PC-BackupRestore, etc.

• 8x 100 nF (you may like to use 3 more, to decouple each IC)
• 3x 1K Resistors
• 1x 100 Ohm Resitor
• 1x 15K Resistor
• 1x BAT-41 Schottky-Diode
• 1x 4/8 Mhz resonator or a 4/8 Mhz crystal + 2x 20 pF
• 2x max3232 level shifter with charge-pump
• 1x the very popular PIC16F84
• Sockets are recommended.
• 1x Sub-D 9 Connector (female) and a 5 wire Cable
• 1x Phone Connector and a 7 wire Cable
• a HEX-File (8Mhz Version) (4Mhz Version)(LOST, WANTED) with the PIC-programm
  (© Copyright 2001 Adrian Dabrowski)
• You can still connect a debug-LED with a 1K resistor to RA2

THIRD VERSION

The upcomming third Version will support even more!

• CTS signal is important when "uploading" or sending more DATA to the phone than it can send to the GSM-Network. With this signal the Phone can ask the PC to wait until all Data is sent, otherwise data may get lost. (Higher Protocols have their own checksums, and will detect such cases most of the times, but it will nether-the-less slow down the connection) [2nd Version]
• DCD signal; may be important to some Applications, others just ignore it. DCD tells the PC that a data-connection exists. [2nd Version]
• DTR-Drop: This is sometimes used to hang up a connection instead of using "+++ ~1sec~ ath". [New]
• RTS signal got somehow unimportant, because virtually all PCs and Notebooks use bufferd UARTs and are fast enough to handle all data. [2nd Version: static; 3nd Version: dynamic]
• nice circuit diagrams :)