ZyXEL Communications P-2812HNU-51c User Manual page 284

Chapter 28 Product Specifications
Table 90 Firmware Specifications (continued)
Other Protocol Support
Management
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
Multiple SIP
Accounts
Echo Cancellation
Comfort Noise
Generation
Dynamic Jitter
Buffer
Voice Activity
Detection/Silence
Suppression
Caller ID
Call Return
Multiple Voice
Channels
Call waiting
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• Transparent bridging for unsupported network layer protocols
• IP Multicasting IGMP v1, v2, v3
• IGMP Proxy/Snooping
• 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
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.
You can simultaneously use multiple voice (SIP) accounts and assign them to
the telephone port (up to two accounts).
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.
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).
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 (VAD) reduces the bandwidth that a call uses by not
transmitting when you are not speaking.
The Device supports caller ID, which allows you to see the originating number
of an incoming call (on a phone with a suitable display).
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.
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.
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.
P-2812HNU(L)-Fx Series User's Guide