To display current Account settings or to select which account
to display.
To display and configure available/unavailable codecs list.
Codec means coder-decoder which is used to transfer analog
signal to digital signal or vice versa.
Familiar codecs are PCMU(G711U), PCMA(G711A), G722
(wide-bandth codecs), G729 and so on.
To configure the video quality.
Codec Name: The default video codec is H264.
Codec Resolution: It can support QCIF, CIF, VGA, 4CIF,
Codec Bitrate: The lowest bitrate is 128, the highest
Codec payload: From 90-119.
To display and configure MWI, BLF, ACD subscription settings.
MWI: Message Waiting Indicator which is used to
indicate whether there is unread new voice message.
BLF: BLF is short for Busy Lamp Field which is used to
monitor the designated extension status.
ACD: Automatic Call Distribution is often used in offices
for customer service, such as call center. The setting
here is to negotiate with the server about expire time of
ACD subscription.