The D-Link DVG-6004S VoIP trunk gateways connect an IP network to POTS (plain old telephone service) analog lines to send IP voice and data to the conventional phone sets and fax machines. Designed as a cost-effective VoIP solution for a small to medium-sized business and the branch office, these devices provide 4 FXO (Foreign eXchange Office) ports for 4 phone line connections. IP network connection can be through any of the 4 LAN ports or the WAN port (all 10/100BASE-TX Ethernet interfaces).

For Office Use. In a remote IP phone to local analog phone line application, a branch office can take in IP voice calls from a head office, then route them to local destinations equipped with only analog phones. the remote office pays only for the local analog phone time. The gateways connect analog callers to the IP network without involving operators or incurring toll charges from telephone companies

The DVG-6004S VoIP gateways can be deployed to interface VoIP infrastructure with a Public Switched Telephone Network (PSTN). They allow analog phone callers to place calls through the long-distance trunk line. The gateways accept dial tone and ring current from the connected equipment, and facilitate the use of conventional phone sets and fax machines on a VoIP network. Guaranteed Voice Quality.

The DVG-6004S gateways deliver clear sound, voice and reliable fax calling through implementation of internationally recognized standards for voice and data networking.

They incorporate Quality of Service (QoS) functions to ensure that voice received through is the same as or even surpasses that received on the ordinary phone. Convenient Call Features. The DVG-6004S gateways support extensive call features,allowing the service providers to offer these functions to their subscribers. Provided that the telephone sets at the end-users side support these functions, callers can take advantage of these convenient features. Configuration of individual phone connection is easy, using the multi-language Interactive Voice Response (IVR) or the web-based user’s interface.

Shared Broadband Connection/Integrated 8-Port Switch. The gateways provide a convenient router function to permit office users to share the broadband line. With 8 integrated Ethernet ports, office computers can readily connect to these gateways and use their built-in NAT/DHCP server functions for automatic logon.

• FEATURES

VoIP trunk

• 4 FXO Ports.
• Compatible With SIP Services.
• Extensive Call Feature Support.
• Guaranteed Toll-Quality Voice Even in Busy Network.

Call Features

• Call Hold, Wait, Forward, Transfer.
• Speed Dialing, Repeat Dialing, 3-Way Conference.
• Greeting Message, Caller ID Delivery.
• Easy Tracking With Call Detailed Records.

Voice Features

• SIP (RFC3261) compatible.
• SIP method: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS,PING, PRACK, PUBLISH, REFER, REGISTER,SUBSCRIBE, UPDATE.
• SIP Extension: Session Timer (UPDATE or re-INVITE), Proxy Required, P-Asserted (RFC3325), MWI (RFC3842).
• Voice CODEC: G.711 a /u law, G.726, G.729A, G.723.1.
• CNG (Comfort Noise Generation).
• VAD (Voice Activity Detection).
• Silence suppression/detection.
• G.165/G.168 echo cancellation.
• Adaptive Jitter Buffer and programmable Gain Control.
• In-Band DTMF, Out-Of-Band DTMF relay (RFC2833, SIP INFO).
• Multiple SIP Proxy server entries with fail-over mechanism.
• T.30 (G.III) / Real time T.38 / Secured T.38 FAX relay.
• DTMF, FSK (Bellcore & ETSI) Caller ID detection and generation.
• Caller ID Restriction (CLIR) support.
• FXO hang up detection: Busy Tone cadence auto learning/detection.
• Single Number / Account for multiple ports.
• Group hunting function.
• Digit Map.
• E.164 Numbering & ENUM support.
• Recordable greeting message.
• Hot-Line, Warm-Line support.