VOIP Gateway 2FXS / 2AFXS / 4AFXS (SIP/ H.323)

Gateway 2FXS/2AFXS/4AFXS is a 2port/4port tel. extension to IP network gateway. It provides VoIP & FoIP with easily operation and configuration. Support DHCP features for Plug & Play operation. Designed for Home, SOHO and IP telephony call use

Key Features:
* ITU-T H.323 v3 / SIP compliance
* Support H.235 security function
* Automatically Gatekeeper Discovery
* Alternate Gatekeeper selection
* Provide Peer-to-Peer Mode (Non Gatekeeper needed) selection
* Line polarity reversal generation
* Provide call progress tone
* PPPoE (option)
* Behind NAT router or IP sharing device
* E.164 Dial Plan
* DTMF detection/generation
* TFTP/FTP software upgrade
* Remote configuration/reset
* MS-NetMeeting v3.0 compatible
* Support Fixed IP and DHCP
* Support QOS by setting TOS (Type Of Service) parameters of VoIP packet
* Automatically FAX detection
* Group 3 Fax relay at 2.4 - 14.4 kbps
* Support T.38 protocol
* Codec -- G.711 A/u-Law, G.723.1, G.729A, G.729
* VAD (Voice Activity Detection), CNG (Comfort Noise Generation)
* G.168/165-compliant adaptive echo cancellation
* Dynamic Jitter Buffer
* Bad Frame Interpolation
* Completed voice band signaling support
* Generate Caller ID (DTMF or FSK)
* Provide Inband or Outband DTMF generation/detection
* Provide H.450 services (Hold, Transfer, Forward)
* Gain/Attenuation Settings
Provide Progress Tone: Dial tone, busy tone, call-holding tone, 2nd Dial tone and ring-back tone