i have C40 and TANDBERG Profile 3000MXP , i cant seem to find the option "sip listenport" under the configuration so Im wondering if those two devices don't support it at all , or it isn't in my current software version "TC5.1.4.295090" for c40 and F7.0 PAL for "TANDBERG Profile 3000MXP" and i need an upgrade to get it.
