I just installed a small SL2100 (3) Phones I upgraded it to latest software 1.05
I noticed that the phones seem to have a little bit of tinny sound when on speaker while listening to Voice Mail /internal and I believe external as well but cant remember at this time (The SL1100 seems much clearer while listening to voice mail )

(I did remove the piece of plastic around the phone)

The customer didn't say anything but I certainly notice it compare to SL1100

also when I tried to program line calibration it went thru the steps but then came back with the word error on the screen

They are using copper lines from Verizon

I spoke with Tech support and they said that they have seen this with SIP Trunks

I was just wondering if anyone else has seen this