1) Do I understand correctly, that SIP is supported only on the Tenor DX, and is not supported for analog/digital series?
2) Does anyone have practical exprience with SIP on Tenor DX? Is it stable? How well it works with Cisco GW/Cisco SIP server? Other SIP servers (e.g. IPTEL’s ser)? Does it support symmetric NAT traversal (for SIP UAs behind the NAT)?