Hi, There is any way to use the PSTN line callwaiting functionality (including callwaiting callerID) with an X00P card? When a second incoming call, on an internal ATA I hear the callwaiting tone, but I don't know how to switch to the other caller through ATA->*->X100P. More, the callerid is not displayed during callwaiting (just during a standard call). There is any direct way to switch the calls from the phone connected to an ATA device? There is any modification to be made in the callerid.c file for the callwaiting callerid functionality? (I have to make one for the normal call in order to support my provider type of callerid signal, but does not work for callwaiting callerid too). Thanks, Dan