Not sure if this is more of a handset manufacture area or PBX, I will try both.
Using Yealink T46's, spent a while going though all their settings cant find any thing for it, but it goes like this.
For simplicity and speed this is the most used transfer type with customers.
A = External
B = Internal (i.e Reception)
C = Internal (other desk phone)
A calls into B wants to speak to C
B calls C putting A on hold (using BLF button)
B & C are talking B transfers A while in call using transfer soft key.
A is connected with C
If C is not paying attention they wont know A has been connected as its a silent connection, is there a way for some tone here? a quick beep?.
The work around is B ends the call to C and does a blind transfer but this adds a few more button presses and is less 'smooth'
Should I approach yealink for this?
Fairly sure the same was true on snom handsets as well.