Connect Dialog

- choose whether to connect via ISDN, to connect to dedicated X.21/V.35 lines, to establish any IP connections, or to loop the .

Connect dialog:

The Connect dialog is opened by either

Interface:

The look of the Connect dialog is context sensitive – relative to the selected interface.

•

ISDN:

If the ISDN interface is selected, a maximum of 8 numbers can be dialled at the same time. This depends on the number of available B-channels - see Status/ hardware.

•	X.21/V.35:

If interface X.21/V.35 is selected, the following port combinations are available:
- Port 1: The audio stream is sent out via X.21/V.35 port 1
- Port 2: The audio stream is sent out via X.21/V.35 port 2
- Port 1 & 2: The same audio stream is sent out via both X.21/V.35 ports
- IMUX Port 1 & 2: One audio stream is sent out on X.21/V.35 port 1 and 2, using Inverse Multiplexing.
       Example:
       A 128 kbit/s MPEG L2 signal is sent out via X.21/V.35 port
       1 and port 2 by using 64 kbit/s at each port.

•

IP:

If the IP interface is selected, the audio stream is sent out via the electrical or optical network interface. Thus, a Destination IP address MUST be entered, and either

- TCP,

- UDP,

- RTP,

- SDP,

- RTSP,

- SIP

must be selected.

Note (IP Port selection):

If RTP or SDP (SAP unchecked) is selected then additionally a port can be entered. The port is delimited to the IP-address by a ‘:’ (e.g. 225.0.0.11:5008).
Which port is used by default depends on the system software version:

a ) Ports if system software version < x.2.0.30:

b ) Ports if  system software version >= x.2.0.30:

Explanation:

x = 2 for CENTAURI I and x > 2 for Centauri II, GANYMED 1102 and MERKII

Note 2:

If UDP, RTP, SDP, RTSP or SIP is selected then right mouse clicking on #1 edit field opens a pop up menu which enables you to select if  encoder, decoder or both gets connected (default).

Note 3 (SDP):

SDP stands for session description protocol.

SDP also uses RTP but additionally a sdp file is created on the Flash card in the folder ‘www’. In this SDP file all necessary transmission info for the other side codec is stored (e.g. VLC player 0.8.2 reads this file and afterwards connects to the ).
More info about SDP can be found at chapter <Necessary settings for framed connections>/How to establish IP connections/SDP streaming>.

Note 4 (SAP):

SAP stands for session announcement protocol.

More or less it is an enhancement of SDP but the SDP files are not downloaded from a special device but they are available under the IP-address 224.2.127.254.

If SDP and Decoder is selected and SAP is checked then the looks at IP-address 224.2.127.254 for session description protocols. Encoders using SAP send their SDP files to this Multicast address. Every time the SAP box is newly checked the list box of ‘#1’ is updated with the currently available SAP streams.

Here the syntax of the listed SAP streams:

<IP-address of SAP encoder>:<hash id of SAP encoder> (<name of SAP encoder>)

More info about SAP can be found at chapter <Necessary settings for framed connections>/How to establish IP connections/SAP streaming>.

Note 5 (RTSP):

RTSP stands for real time streaming protocol.

Note 6 (SIP):

SIP stands for session initiation protocol.

More info about SIP can be found at chapter <Necessary settings for framed connections>/How to establish IP connections/SIP connections>.

•

Loop:

If the Loop interface is selected, the internal Encoder is directly connected to the internal Decoder.

This function is for test purposes, e.g. to check the audio quality through the Encode/Decode process.
 

To make a connection:

The selection of Communication interface and establishing the connection is initiated by clicking OK.

The dialog is closed as soon as the connects or frames-up.