Grandstream GXW4024

GXW4024 is a high density VoIP gateway, based on SIP standards and compatible with large number of IP PBX softswitch systems.

This gateway has 24 FXS ports with high quality of voice, rich set of features, flexible dial plan table and advanced security features. GXW4024 is designed for small and medium businesses, allows creating low cost hybrid IP and analog phone systems, for creation of VoIP systems which do not require big investments, while maintaining investment in analog telephones and faxes and traditional PBX.

Its main characteristics are the availability of 24 phone ports with RJ11 connectors and 50-pin TELCO connector. Device allows creating up to 2 SIP profiles per server and independent accounts on each port. GXW4024 supports G.711, G.723, G.726, G.729 A/B/E, iLBC, T.38 FAX voice codec and provides support for G.168 echo cancellation.

Providers in database: 6433

Echo cancellation module VPMADT032

VPMADT032 echo cancellation module is meant to be used with the Digium IP telephony boards; it provides echo cancellation for configurable long "tail" of up to 128 ms (1024 samples) simultaneously for all ports of the board. All IP-PBX Asterisk servers, connected to the telephone network (PSTN) have one common problem, which is "hybrid echo" - echo obtained due to the difference in the load-wire and four-wire telephone circuits. Echo appears as a distorted reflection and a detainee of the caller's voice, who is subscribed to IP-PBX Asterisk while talking to PSTN subscribers.

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