Howdy all,
I have recently added a SPA525G2 to our existing Mitel 5000 CP.
Let me start off with the comment that this is very nearly a perfect IP phone. If it had a gigabit switch instead of 10/100 it would get there
I have it working on the Mitel switch -- I can make/receive calls, get voice mail indications, etc...
I have only one feature that's giving me fits -- Attended Transfer.
On the Mitel we have two options for performing transfers -- Transfer to Ring (3345) and Transfer to Hold (3346).
I use the *3345 for blind transfer, and it works exactly as expected.
However, for the attended transfer, I have yet to get it to work right -- I cannot transfer the call after the user picks up... it only tells me that the transfer failed, and then I cannot get back to the calls.
Troubleshooting settings I have played with:
SIP - Hold Target Before Refer, Keep Referee when REFER Failed
SIP - NAT SUpport - Handle VIA, Insert VIA
Regional - Referral Services Codes (*3345)
Extension - Blind Attn-Xfer Enable
