Getting some SBC configured for testing. Calls between Cisco SPA-502G units behind the SBC.. are fine. Calls between one of them and the 504G on my desk.. fine. External calls with "their" MOH.. fine. Internal calls with our own MUCH at my own desk.. fine. Internal calls with our own MOH for those handsets behind the SBC.. choppy! Seems odd that other legs are fine.. except when I'm on hold. Anybody else?