T48G - Prevent new line on DSS Key press

[someone1]

Hello,

I have a few T46G phones which I can do this with, but when trying on my T48G phones, I cannot.

I setup a few keys to be prefix keys (e.g. Voicemail). With the T46G phones, I can press the key and then the BLF of the person I want to transfer or park to and it will take effect on the current call (Line 1).

Replicating this on the T48G somewhat works, but instead of applying the key presses to the current call, it places it on hold and picks up Line 2 as if I'm starting a new call.

Is there a setting somewhere to make it behave like it does on the T46G? This becomes a problem when we want to "park to extension" - if it picks up a second line the prefix does nothing (unlike a transfer where you can hit transfer) - the key presses need to take effect on the current call in order to be parked.

Thank you.