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The SyVoice module by SyChip allows a mobile phone to roam between a cellular network and a WLAN network, giving the user the flexibility to maintain the most cost effective voice connection.
The SyVoice VoIP engine is optimized to reduce power dissipation by offloading all the functions necessary to maintain a VoIP call from the host processor. The VoIP engine consumes only 18mA of current during a call, allowing phones to have talk times of more than five hours and standby times in excess of 100 hours.
VWLAN7100 combines a VoIP processor and an 802.11b/g WLAN modem. The module is designed to easily interface with most baseband and application processors on the market. The module also incorporates software features such as a SIP 2.0 stack; VoCoders G.711, G.729AB, G.723, G.726, jitter buffer; call control functions including origination/termination, forwarding, waiting, hold, transfer and 3-way; audio control; and IPSEC.
SyChip will provide the driver to support operating systems such as Rex, Windows Mobile, Linux, Nucleus and Symbian Operating Systems.
The WLAN section of the CSM supports features such as WMM, Quality of Service (QoS) traffic prioritization critical for VoIP and multimedia applications, WPA2 (IEEE802.11i) security and Bluetooth co-existence.
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