Weatherproof Telephone Emergency phone public telephone for Tunnel
|Widely used in the place of water proof, moisture proof, fire proof, anti-noise, dust proof, antifreeze, such as subway, highways, power plants, gas stations, docks, steel companies, etc.|
|1. Support SIP 2.0 (RFC3261) and SIP-related RFC.2. Speech Coding: G.711A / u, G.7231 high / low, G.729a / b, G.722, G.722.1, G.726.3. Echo cancellation: Support G.168, full duplex, support VAD, CNG.4.DTMF to support: SIP info, DTMF Relay, RFC2833.5. Support SIP application, including SIP Call forward / transfer (blind / attended) / hold / waiting / 3 way talking.6. Support server conference.7. Support path, gruu.8. Support SIP Privacy.
9. Support xDSL PPPoE, and supports break automatically redial.
10. Support VLAN (DATA VLAN and VOICE VLAN).
11. Support STUN client.
12.WAN port supports primary and secondary DNS servers, support for DHCP mode can be selected using the dynamically obtained DNS DNS address or use a static configuration.
13.Support DHCP Client on WAN port.
14. Support DNS Relay, SNTP Client, Firewall.
15.Qos support Diffserv.
16. Support command network tools: Including ping, trace route, telnet client.
17. By IPBPX, it enables group calls, broadcast function.