Overview; Principle; Function Description - Huawei espace 7810 Administrator's Manual

Huawei IP Phone eSpace
7810&7820&7830&7850&7870&7803X
Administrator Guide

1.1 Principle

Huawei IP phones use the digitalized transmission technology in packets based on the IP
technology. The basic principles are as follows:
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Voice data is transmitted through the IP network. The IP phone system converts the analog
signals of a common phone into IP packets that can be transmitted through the Internet, and
also converts the received IP packets to analog electric signals.

1.2 Function Description

In terms of the orientation, eSpace 7870, and 7850 are high-end-oriented products, eSpace
7830 and 7820 are a middle-end-oriented product, and eSpace 7810 is a low-end-oriented
product. eSpace 7870, 7850, 7830, 7820and 7810 are a series of products.
In terms of the functions, eSpace 7870, 7850, 7830 and 7820 use the advanced digital signal
processing (DSP) technology with the help of the automatic gain and comfort noise
generation (CNG) technologies. Therefore, eSpace 7870 and 7830 provide voice of high
quality, which is as good as the voice provided by the traditional public switched telephone
network (PSTN).
Codec Function
eSpace 7850, 7830, 7820 and 7810 support G.711A, G.711µ, G.722, G.723, G.726, G.729AB,
and iLBC codec mode, and configuration of voice codec priority. In general, retain the default
configuration of voice codec priority for deployment. If the network environment is complex,
you can adjust the codec priority according to the actual network bandwidth.
Issue 01 (2011-12-31)
Compress and encode voice data according to the voice compression algorithm.
Package the voice data based on a certain protocol such as the IP protocol.
Send data packets to the recipient through the IP network.
Decode and decompress voice packets after collecting the voice packets to restore the
voice packets to the original voice signals.
eSpace 7870 supports G.711A, G.711µ , G.722, G.723, G.726, and G.729AB except iLBC.
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Overview

1 Overview
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