ZyXEL P-2802HWL-I3 User Guide - Page 330
Product Specifications, P-2802HWL-I Series User's Guide, Voice Features
View all ZyXEL P-2802HWL-I3 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 330 highlights
Chapter 26 Product Specifications Table 148 Voice Features 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. Call forwarding With this feature, you can set the ZyXEL Device to forward calls to a specified number, either unconditionally (always), when your number is busy, or when you do not answer. You can also forward incoming calls from one specified number to another. Caller ID The ZyXEL Device supports caller ID, which allows you to see the originating number of an incoming call (on a phone with a suitable display). REN A Ringer Equivalence Number (REN) is used to determine the number of devices (like telephones or fax machines) that may be connected to the telephone line. Your device has a REN of three, so it can support three devices per telephone port. 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. Multiple SIP Accounts You can simultaneously use multiple voice (SIP) accounts and assign them to one or both telephone ports. 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. Voice Activity Detection/Silence Suppression Voice Activity Detection (VAD) reduces the bandwidth that a call uses by not transmitting when you are not speaking. 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). 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. QoS (Quality of Service) Quality of Service (QoS) mechanisms help to provide better service on a perflow basis. Your device supports Type of Service (ToS) tagging and Differentiated Services (DiffServ) tagging. This allows the device to tag voice frames so they can be prioritized over the network. SIP ALG Your device is a SIP Application Layer Gateway (ALG). It allows VoIP calls to pass through NAT for devices behind it (such as a SIP-based VoIP software application on a computer). Other Voice Features SIP version 2 (Session Initiating Protocol RFC 3261) SDP (Session Description Protocol RFC 2327) RTP (RFC 1889) RTCP (RFC 1890) Voice codecs (coder/decoders) G.711, G.726, G.729 Fax and data modem discrimination DTMF Detection and Generation DTMF: In-band and Out-band traffic (RFC 2833),(PCM), (SIP INFO) Point-to-point call establishment between two IADs Quick dialing through predefined phone book, which maps the phone dialing number and destination URL. Flexible Dial Plan (RFC3525 section 7.1.14) 330 P-2802H(W)(L)-I Series User's Guide