入门级1条线路IP电话 支持SIP 2.0 (RFC3261) 和相关RFC 协议 支持2个SIP服务器 128x48像素显示器 高清语音 PoE(可选) 支持TR-069Phone features vxworks OS Supports SIP 2.0 (RFC3261) and correlative RFCs SIP supports 2 SIP servers, and backup SIP proxy servers. Supports SIP UDP/TCP/TLS SIP support SIP domain, SIPauthentication (none, basic, MD5),DNS name of server, Peer to Peer/ IP Call Display Display Resolution: 128x48Feature Keys Large dot matrix LCD display and softkeys make user easier to use Soft keys programmable; function keys pro |