Product guide

A5000 R5.4 Product Guide – SIP terminals – Aastra 6700i range
BPS0121AENAA01 Page 27/64
35.12 DHSG compatibility of the terminals
The DHSG protocol is used to manage remote go off hook and go on hook, from the headset. Aastra
terminals 6753i, 6755i, 6757i, 6735i, 6737i and 6739i are DHSG compatible (as of release R2.5.0).
The terminal automatically detects the DHSG headset connected.
The compatible headsets are GN Netcom headsets. For more information, please refer to chapter
“Managing headsets on Aastra Terminals”
Restriction: when a headphone is connected in DHSG mode, no keypad extension module can be
associated to the terminal.
35.13 G.722 support on Aastra 6700i
The table below compares the performances of the codecs supported by Aastra 6700i series terminals
and shows, among other things, that with the same bandwidth G.722 offers a better audio quality (HD)
than G.711 (SD):
Audio format
Sampling
frequency
Bit
rate
Restored
frequency
Quality
Support
G.729
8 kHz
8kb/s
300-3400Hz
SD
Aastra 6700i, BluStar
8000i, ACP, UCP
G.711
8 kHz
64kb/s
300-3400Hz
SD
Aastra, 6700i, BluStar
8000i, ACP, UCP
(Broadband)
G.722
16 kHz
64kb/s
7kHz
HD
6700i, BluStar 8000i
35.14 Comparison of the features of Aastra 6700i
For more information please refer to Chapter 10 "Table of Compatibility and Extension Levels" -
"Phones" tab.