Gizmo Project

Gizmo5 is based on the Session Initiation Protocol and can interoperate with other SIP-based networks directly, including the public switched telephone network. The latter requires the Gizmo5 service features CallOut and CallIn, available at a fee, whereas calls to other VoIP users are generally free of cost. Gizmo5 also uses encryption (Secure Real-time Transport Protocol) for network calls and works well with Phil Zimmermann's new Zfone security features.

Gizmo5 supports the following Codecs:

GSM — fixed bit rate, not loss tolerant, narrow band (8khz sampling rate)
PCMA — fixed bit rate (8 kHz sampling rate)
PCMU — fixed bit rate (8 kHz sampling rate, high band width)
EG711 (Enhanced G.711) — fixed bit rate, loss tolerant, narrowband
iSAC — variable bit rate, loss tolerant, narrow and wideband (8 to 16khz)
iLBC — variable bit rate, loss tolerant, narrow
iPCMwb — 16 kHz sampling rate
iPCM — fixed bit rate, loss tolerant, wideband

Download Links:

Gizmo Project 4.0.5.400