OK, just finished selfmade cable.
Rx and Tx do through the MAX, and CTS(5), RTS(6), DCD(7) are connected to the GND(2) trough 10k resisors. Without this it does not work. Or other way is to connect RTS to CTS straigt, it will communicate with the PC then also. Communication with the PC was fine in both cases. So, sefmade cable is considered to work correctly, at least for the AT commands.
Tried swapping Rx and Tx as Ioannis sugested, but it just made my phone to go off. After restart it was working fine. So, nothing was wrong with my pinout.
Now, NavMicroSystems, i am not that sure about powering cable from COM port. It is rather powered by the phone itself (as strange as it sounds). As a proof i can say, that i was able to communicate with the PC, using original cable with only 3 wires (Rx, Tx, GND), rest of them i disconnected for the experimental sake. And in this configuration it was working with hyperterm or some similar software except original Siemens software, which did not detect the phone. Only when you connect also CTS line, the phone will be detected by the Siemens software.
I should mention again, i'm experimenting on S65 and S55 phones which are rather new, and they are different from older Siemens models, pinout of the phone's interface and connector itself are different.
So, now my setup looks like this: PIC--->MAX232--->MAX232(selfmade cable)--->Pnone
From above, and as NavMicroSystems says, both MAXes can be ommited. Will try then connecting straight PIC to Phone using serout2 in inverted mode.
Wish me good luck
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