其他功能
| 网络结构 |
G.711 A-/U-law, G.723.1, G.729A/B, G.728, G.726, iLBC. |
| 安全特性 |
MD5, MD5-sess |
协议
| 数据链路协议 |
TCP/UDP/IP |
| 管理协议 |
SIP2.0, TCP/UDP/IP, RTP/RTCP, HTTP, ICMP, ARP/RARP, DNS,DHCP, NTP, PPPoE,TFTP |
另外
| 数据传输率（最大） |
100 Mbit/s |
| 连接方式 |
Wired |
VOIP PSTN FXS and FXO port
Use easily your existing analogue telephone devices for Voice-over-ip calls! All-In-1 VoIP device with PSTN life line port FXS and FXO port.
• Model: Grandstream 488
• Support SIP2.0, TCP/UDP/IP, RTP/RTCP, HTTP, ICMP, ARP/RARP, DNS,DHCP (both client and server), NTP, PPPoE,TFTP, etc.
• Supports also dialing directly to IP address (without SIP server)
• Autodetect incoming calls on PSTN line or Voice-over-ip
• Caller ID supported
• 1 x 10Base-T WAN port
• 1 x 10Base-T LAN port
• 1 x FXS port analogue telephone port
• 1 x PSTN life line port
• Built-in router, NAT and Gateway
• Powerful digital signal processing (DSP) to ensure superb audio
quality; advanced adaptive jitter control and packet loss concealment
technology
• Ultra compact (wallet size) and lightweight design, great companion
for travelers
• Support various vocoders including G.711 A-/U-law, G.723.1,
G.729A/B, G.728, G.726, iLBC.
• Support Caller ID/Name display or block, Hold, Call Waiting, Call
Transfer, Call Forward, Flash, Three-Way Conferencing (pending)
• Support customizable ring tone (pending)
• Fax pass through and T.38 (pending)
• Support silence suppression and VAD, AGC and echo
cancellation (G.168)
• Support standard encryption and authentication (DIGEST using MD5 and MD5-sess)
• Support layer-2 (802.1Q VLAN, 802.1p) and layer-3 (DiffServ, ToS) QoS
• Support automated NAT traversal without manual manipulation of firewall/NAT
• Support remote automated provisioning and software upgrade even through firewall/NAT to
enable “zero configuration” and “plug-and-dial” for end users
• Support device configuration via built-in IVR, Web browser or central configuration file
• Support DNS SRV Look Up
• SIP Server Fail Over (pending)
