NB:         Plug into outside network cable   Note that on the InterTel 8622 phone there is a set of programmable buttons on right. The top two are MUTE (on left) and FWD (on right) The bottom two are TRANSFER (on the left) and OUTGOING (on the right)   To switch phone mode to SIP (unusual) press number keys 1&2 when plugging into power To switch phone to Inter-Tel (correct) press number keys 5&6 when […]