TANDBERG 1700 MXP - Manual (Page 87)

D 13954.01
MAY 2006 87
TANDBERG 1700 MXP
USER GUIDE
Audio Algorithm
Control Panel > Call Quality Settings
CANCEL
Select this icon and press OK
to leave the menu undoing any
changes.
RESTORE DEFAULTS
Select this icon and press OK
to restore the default settings.
SAVE
Select this icon and press
OK to leave the menu putting
changes into effect.
AUDIO ALGORITHM
The system will automatically select the best audio algorithm based on the call rate and
the capabilities of the remote system. Use this menu to disable audio algorithms in case
you want to remove “low quality” audio, or if you have interoperability issues calling other
systems.
G.711
Normal quality audio (telephone quality 3.1kHz at 64kbps). This audio algorithm is manda-
tory for video conferencing equipment and is impossible to uncheck.
G.728
Compressed normal quality audio (telephone quality, 3.1 kHz at 16kbps)
G.722
High quality audio (7 kHz at 48kbps, 56kbps or 64kbps)
AACLD
CD-quality audio, MPEG-4 Advanced Audio Coding Low Delay (20 kHz, stereo at 128kbps,
mono at 64kbps).
G.722.1
Compressed high quality audio (7 kHz at 24kbps, 32kbps and 48kbps).
CALL RATE VS AUDIO ALGORITHMS SELECTED
Modify/remove algorithms used by unchecking the different audio algorithms.
Automatically preferred audio algorithms on
call rates up to and including 12kbps
1. G.722.1 (24kbps or 32kbps)
2. G.728 (16kbps)
3. AAC-LD (64kbps or 56kbps)
4. G.722 (56kbps, 64kbps or 48kbps)*
5. G.711 (64kbps, 56kbps or 48kbps)**
6. AAC-LD (48kbps or 128kbps) Automatically preferred audio algorithms on
call rates above 12kbps
1. AAC-LD (128kbps)***
2. AAC-LD (64kbps or 56kbps)
3. G.722 (64kbps, 56kbps or 48kbps)*
4. G.722.1 (32kbps or 24kbps)
5. G.728 (16kbps)
6. G.711 (64kbps, 56kbps, 48kbps)**
7. AAC-LD (48kbps or 128kbps)
* G.722 at 64kbps is used in H.323 (IP) calls only.
** G.711 at 64kbps is used in SIP and H.323 (IP) calls only.
*** Dependent on a call rate above the AAC-LD 128 threshold.
Note that this is not available on all TANDBERG systems.