Hot key pad: without lifting the handset, dial the number, then press dial (soft key option on the first or second softkey on the top left).

"sometimes the clipping is so bad that you cant use it."

Same problem, if I hit the mute key it stops clipping, un-mute then same gig, hang up, make another call and all works great.

Note:
Some phones that have this are a year old, others are no more than 5 months old, so IMHO, not a bad batch because the phones were bought at different times.

You do know you can use any SIP phone on the IPitomy system. There phones don't seem to be working for us, I wonder if anyone here has used other SIP phones?

The box seems solid, The IP550 phones are not so solid.

FYI
The new company they reccomend for SIP trunks seem to be very good (6 months using them). As mentioned, we have two systems side by side in our office, out going calls are made on the IPitomy via sip trunks.

We have no experience yet on incoming traffic since all incoming goes through are traditional ESI phone system.

My father is the pro with this you may want to speak with him.

Bryan