User`s guide

VigorTalk ATA24 Series User’s Guide
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The VigorTalk ATA-24 series integrates a rich suite of functions. These products are very
suitable for providing multi-integrated solutions to SME markets. An application scenario for
the VigorTalk ATA-24 is depicted in Figure 1-1, which illustrates interconnections among
branch offices through the Internet via the VigorTalk ATA-24 adapter. By combining with an
existing PBX, an Internet phone from a remote branch can also access any extension number
on a local PBX or a traditional phone via PSTN. Also, with Internet phone features, the
company can benefit from reducing operation fees.
Internet Telephony, also known as Voice over Internet Protocol (VoIP), is a technology that
allows you to make telephone calls using a broadband Internet connection instead of a regular
(analog) phone line. Combining a PBX with the adapter allows you to call anyone who has an
Internet phone or a traditional telephone number – including local, long distance, mobile, and
international numbers. Internet Telephony offers features and services that are unavailable
with a traditional phone at no additional cost. Because Internet Telephony requires strictly
minimal packet delay and jitter (since voice quality is intolerant of packet loss), the adapter
integrates VoIP feature with QoS and packet loss concealment mechanisms to effectively
transport high priority voice traffic over IP with low latency. Another feature is T.38 fax relay.
By enabling and configuring fax rate on a dial peer, the originating and the terminating adapter
can enter fax relay transfer mode. By using the T.38 function, customers can also save on fax
expenses.