I'm trying to connect to a modem which will only respond at 2400 baud. If I try from an old standalone desk modem, it manages this fine. Through a Cisco MICA modem in our access router, it seems to connect at 21600, and freezes after the connect line. Any higher requested rate (using modem registers S30 and S31 to restrict the baud rate) connects at 33600 with the same response - nothing. Connecting at lower than 2400 just gives me gobbledegook back.
Most similar devices I'm connecting to manage this fine, it's just this one that seems anomalous. Anyone seen anything like this before and can suggest anything to try to fix it? Getting the modem at the far end replaced is not an option I'm afraid, as I can get access - just not via the route I want to.