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AEQ
PHOENIX ALIO
21
3.7. Function keys.
The units operational keys are completed by 6 illuminated function
keys located at the right area of ALIO front panel. Some of these
keys ("IP", "SIP", "AUTO", "CODEC") configure parameters or
operating modes for the currently active channel only. "HELP" and
"MENU" keys are associated to functions that are common for the
unit.
The detailed description of the function for each key is described
below.
3.7.1. MODE keys ("IP" and "SIP").
These keys are labeled as "IP" and "SIP" and their operation are exclusive (only one of these
can be enabled at any given time). These keys affect the currently selected channel only
(PROG or COORD and provided that the latter is available - licensed). They allow the user to
select how Phoenix ALIO communicates with other equipment.
IP mode: RTP / SmartRTP
When the "IP" key is pressed, the unit will establish all communications in RTP mode, without
using SIP. In order to establish a communication in this mode, the destination IP address must
be known as well as the receiving audio port.
The standard operation, compatible with other manufacturers, requires that both sides of the
communication initiate the call (call the IP and the active audio port of the remote equipment)
and that both have selected the same encoding algorithm for the communication.
However, thanks to the "SmartRTP" functionality from AEQ, the task of making an RTP call is
greatly simplified. When operating Phoenix family of AudioCodecs with this mode activated, it is
only required that the "caller" launches the call. The remote equipment will automatically answer
and send its audio stream to the callers IP and port. Further, the AudioCodec will also detect
and automatically select the encoding algorithm that the calling unit is using to initiate the
communication. The call does not need to be manually accepted and the hang-up event (from
any end) will also be signaled to either unit.
NOTE: The illumination of the key will flash whenever the associated channel is unavailable
because the Ethernet link is down. Once the flashing of the key stops, communications can be
initiated.
Please refer to chapters 3.7.2, 4.2.1 and 5.3.1 for more details.
SIP mode: N/ACIP compatible
SIP (Session Initiation Protocol) is an alternative to RTP for making a call. The SIP key
configures the unit so all communications made with the currently active channels use this
signaling protocol, compatible with other codecs following N/ACIP standard from EBU. It can be
used directly between audiocodecs (DIRECT SIP) or taking advantage of an external Proxy
(PROXY SIP). Its function is to maintain a database of all registered codecs with their IP
addresses and listening ports making it possible to establish a connection between audiocodecs
located in different networks. This allows the user to "forget" about the IP address and port of
the remote unit.
SIP mode will alternatively change between DIRECT SIP and PROXY SIP when pressing the
"SIP" key repeatedly. Depending on the selected mode, the communications menu options
(MENU
COMMUNICATIONS
SIP) may vary slightly so the user only needs to configure the
required options.
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