DSG InterPhone, Operation Manual

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InterPhone Operation Manual
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Overview
In the past, real-time voice communication is sent over the Public Switched Telephone Network
(PSTN). With the circuit switched technology, every call takes up a dedicated bandwidth. End-
to-end calls are established on the basis of a sequence of dialled digits, and the PSTN dedi-
cates a physical path between callers. Although the telephone equipment establishes the call
path at the beginning of the call, the path may change between calls, but not during any specific
call.
In comparison with the PSTN, an Internet Protocol (IP) network has a packet-switched
architecture. Data are transmitted in packets, and the path from end to end can vary within an
established session. The data packets also contain the destination IP address information,
with which packets are routed. As networking environments change, routing devices are up-
dated with dynamic protocols.
InterPhone is a complete Ethernet telephone set, which transmits voice traffic over IP-based
packet switched networks, and it is able to use as a traditional PSTN telephone.
All-in-one Design
InterPhone has its own processor and network interface; it works independently and intelligently!
Simply dial the IP address or device ID of the remote party from your InterPhone, then you are
ready to talk via the Internet. All of the communication costs will be eliminated except a local
Internet connection charge. InterPhone is the most convenient Ethernet phone for users to
make Internet phone calls remaining the same habit as they make IDD (International Direct
Dialling) calls.
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Overview