Hi, Trying to figure out how 3CX is passing the below config to the phones when that P Value doesn't seem to be in the 3CX supported templates for grandstream. I've created a new template for a 2135 and set this P value to 0 but it's getting overwritten somehow. Enable transfer via non-Transfer MPK. 0 - No, 1 - Yes. Default is 0 --> <!-- Number: 0,1 --> <!-- Mandatory --> <P22162>1</P22162> We use grandstream for all our installs and want to be able to use attended transfer and blind transfer with the help of using BLF's but it looks like you have to select either attended or blind if you want to use BLF's to transfer.