I'm using a Cisco 3640 with Mica modems (tested Portwares 2.7.2.0/2.7.4.0/2.9.4.0) for dial-in to mobile users over GSM/HSCSD. When dialing from the GSM to the Cisco router, I am able to connect only at speed 9600/9600 bps. Connection requests with h...