I have a RUT955, running the latest firmware RUT9XX_R_00.04.75
I am trying to send a sms to a group via post/get but it always just returns "ERROR". Sending to one number works perfectly. I have tried all possible number formats but can't find why this isn't working. I have another device where it does work, but can see no difference between the two other than that the one is sending from the LAN and this one is sending via the WAN address...
Any clues as to what to check or help would be much appreciated.