ZyXEL P-2812HNU-F1 User Guide - Page 284
Voice Specifications
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Chapter 28 Product Specifications Table 90 Firmware Specifications (continued) Other Protocol Support • Transparent bridging for unsupported network layer protocols • IP Multicasting IGMP v1, v2, v3 • IGMP Proxy/Snooping Management • Embedded Web Configurator • CLI (Command Line Interpreter) • Firmware upgrade and configuration file restore through Web/FTP/SCP/ SFTP • Remote Management Control: Telnet, FTP, Web, SSH/SCP/SFTP, and ICMP. • Remote Firmware Upgrade • Syslog • TR-069 • TR-064 Voice Specifications Note: To take full advantage of the supplementary phone services available through the Device's phone port, you may need to subscribe to the services from your VoIP service provider. Note: Not all features are supported by all service providers. Consult your service provider for more information. Table 91 Voice Features Voice over IP SIP standard (RFC3261), as well as phone features. TYPE-II CPEs support 2 FXS ports design which allows users to make 2 VoIP phone calls at the same time. Multiple SIP Accounts You can simultaneously use multiple voice (SIP) accounts and assign them to the telephone port (up to two accounts). Echo Cancellation You device supports G.168, an ITU-T standard for eliminating the echo caused by the sound of your voice reverberating in the telephone receiver while you talk. Comfort Noise Generation Your device generates background noise to fill moments of silence when the other device in a call stops transmitting because the other party is not speaking (as total silence could easily be mistaken for a lost connection). Dynamic Jitter Buffer The built-in adaptive buffer helps to smooth out the variations in delay (jitter) for voice traffic. This helps ensure good voice quality for your conversations. Voice Activity Detection/Silence Suppression Voice Activity Detection (VAD) reduces the bandwidth that a call uses by not transmitting when you are not speaking. Caller ID The Device supports caller ID, which allows you to see the originating number of an incoming call (on a phone with a suitable display). Call Return With call return, you can place a call to the last number that called you (either answered or missed). The last incoming call can be through either SIP or PSTN. Multiple Voice Channels Your device can simultaneously handle multiple voice channels (telephone calls). Additionally you can answer an incoming phone call on a VoIP account, even while someone else is using the account for a phone call. Call waiting This feature allows you to hear an alert when you are already using the phone and another person calls you. You can then either reject the new incoming call, put your current call on hold and receive the new incoming call, or end the current call and receive the new incoming call. 284 P-2812HNU(L)-Fx Series User's Guide