eSpace 6805 IP Phone
Administrator Guide
2 Overview
Issue 01 (2014-01-06)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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2
Overview
2.1 Principle Introduction
The IP phone product adopts the digitalized transmission technology in packets based on the
IP technology. The basic principle is as follows:
Compress and code voice data according to the voice compression algorithm.
Pack the voice data based on a certain protocol such as the IP protocol.
Send the data packets to the recipient through the IP network.
Decode and decompress the voice packets after collecting the voice packets to restore the
voice packets to the original voice signals.
In this way, 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 for voices.
2.2 Functions
In terms of the functions, eSpace-series IP phones use the advanced digital signal processing
(DSP) technology with the help of the automatic gain and comfort noise generation (CNG)
technologies. Therefore, eSpace series provides voice of high quality, which is as good as the
voice provided by the traditional public switched telephone network (PSTN).
Codec Function
eSpace 6805 support G.723.1,G.729AB,G.711 A-law/μ-law,G.726,G.722 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.
If the network is in a good condition, G.711 A-law/μ-law is recommended to ensure high
voice quality.
If the network is not in a good condition, G.729AB or G.723.1 is recommended.
