We love our Balance 30, and we would like to see the addition of a SIP back-to-back User Agent (B2BUA) to improve the reliability of VoIP telephony during a WAN link failure. A B2BUA acts as the registrar for every device on the LAN and the device for every registrar on the WAN, effectively creating two call segments. When a WAN link fails, the B2BUA could send a re-register for all of its client devices to the “real” SIP registrar without the client devices ever noticing a problem. This would prevent the need to re-power or restart IP phones when a WAN link fails. If executed fast enough, it could also continue calls-in-progress with only minimal drop out at the moment of a WAN failure.
Keep up the great work!