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Internet Telephony Gateway
VGW-400 Series
(Quality of Service), 802.1Q VLAN tagging, and IP TOS (Type of Service) technology. Using
voice and data VLAN can easily separate the data and voice, thus maintaining the best quality.
Supporting Caller ID
Both the FXS and FXO ports of the VGW-400 Series support caller ID function, help user
identify calling number easily and verify number. It also helps to block anonymous call by
filtering strange calls. The FXS port transmits Caller ID, while the FXO port receives Caller ID.
The Caller ID interoperates with analog phones, public switched telephone networks (PSTN)
and private branch exchanges (PBXs).
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