Thank you very much! You are gentlemen and didn’t leave girl in a trouble 🙂 I’ve started this discussion and then disappeared – not good, please, don’t think I’m thankless 🙂 I’m following your “conversation” very attentively.
1) Some more details: this firm is based on military sub-unit and they use their own equipment (not usual modems of well known vendors), it’s a development of their laboratory, so I can expect everything :() And except fixed objects and the server they have portable terminals (located in cars) with which they can test the state of any modem at any time.
2) Dear Pan, thanks a lot for very useful information and detailed explanation (especially – about transmitting DTMF through network (much better than in the university)
3) Dear Pix, thank you very much for all your help and for your advice – I spoke with our TAC, I think in some days Fault Report will be opened. They asked me for some traces – so I have K 15 with me and ready to give them all information they want 🙂 But you know I’ve found more help and useful advices here than from our TAC. I don’t want to hurt your colleagues, it’s only a praise to you.
Soon I’ll have more information.