SAP streaming is more or less an enhancement of SDP streaming (see SDP streaming). SDP and SAP streaming are supported with system software version 2.1.0.50 (or later).
General
SAP stands for session announcement protocol. Same as SDP streaming (see SDP streaming) a SDP file is created but additionally the SDP information is sent to the Multicast address 224.2.127.254. The SAP decoder retrieves the SDP information from this Multicast address (and not from the SDP Encoder). SAP announcements are sent on port 9875.
There are two advantages of SAP streaming compared to SDP streaming:
a) Since the SDP file must not be retrieved from the encoder device, unidirectional connections are sufficient (e.g. important for satellite transmissions).
b) At Multicast address 224.2.127.254 the SDP information of all SAP streaming encoders is available (and not just the SDP information of one device).
More info about SAP can be found in rfc 2974 (www.ietf.org/rfc/rfc2974.txt).
1. Configuration steps at 
encoder
1.1 Codec settings
Configure the codec settings via menu item Settings/Codec:
| • | Interface: IP/RTP |
| • | Encoder dependency: Remote |
| • | Encoder algorithm: Algorithm supported by the other side codec Note: With SAP streaming the  supports the algorithms AAC (MPEG4)and AAC (HE) |
| • | Decoder dependency: Remote |
1.2. Establish Connection
Click the CONNECT button to open the Connect-dialog:
| • | Select interface to IP |
| • | Select SDP |
| • | Click on IP-address field # 1 with right mouse button to open a popup menu and select encoder |
| • | Check SAP |
| • | Type in the IP-address |
| • | Click the OK-button to establish connection |
2. Configuration steps at decoder
2.1 Codec settings
Configure the codec settings via menu item Settings/Codec:
| • | Interface: IP/RTP |
| • | Encoder dependency: Remote |
| • | Decoder dependency: Remote |
2.2. Establish Connection
Click the CONNECT button to open the Connect-dialog:
| • | Select interface to IP |
| • | Select SDP |
| • | Click on IP-address field # 1 with right mouse button to open a popup menu and select decoder |
| • | Check SAP |
| • | After the SAP box is checked the list box of ‘#1’ is updated with the currently available SAP streams; one of these SAP streams must be selected |
| • | Click the OK-button to establish connection |
