I.R.I.S. 402 - Manual (Page 19)

RTSP Streaming:
The 4 RTSP streaming protocols below are available for different network environments.
UDP: This is unicast method in “RTP over UDP”. UDP is a simple transmission mode and more likely for
request of the most up-to-date information. However, video packets may be lost or dropped in the network
traffic as UDP does not guarantee the endpoint transmission. This method is usually applied in a smaller
scale of LAN or intranet environment where packet lost may not be an issue.
UDP Multicast: This provides RTP over UDP in multicast manner, which is one-to-many communication
over an IP infrastructure in a network.
TCP: This is unicast method in “RTP over RTSP (TCP)”. TCP is a reliable for end-to-end data transmission
when comparing to UDP mode. Thus, it is applied for quality of the data is concerned. This method is used
when data is sent through networks or Internet.
HTTP: It is unicast method in “RTP over RTSP over HTTP”. As firewalls normally allow HTTP protocol, it is
not necessary to enable the specific port for RTSP video traffic. That is the IP camera’s web page with live
video stream can be retrieved through HTTP port.
Network Connectivity:
This page details connectivity configuration, so that IP camera can be accessed without necessarily
providing the numerical IP address.
Enable UPnP Service: with UPnP enabled, the IP camera device can be easily discovered in Windows
Network (My Network Places). See “Discover devices in Windows Network” in previous section.
Enable DDNS Service: By registering this sort of service, the camera can be assigned and accessed over
an Internet connection with a hostname instead of IP address. To enable the services, visiting the website of
the service provider and registering an account are required.
Quality Service:
Quality Service provides network traffic management to guarantee the quality of services in higher priority,
especially when network is insufficient. DSCP (Different Service Code Point) is a 6-bit IP header which
defines the service level of the packet. According to the DSCP value, routers with PHB (Per-Hop Behavior)
will define a specific class of traffic for the packet, in terms of bandwidth, latency, or loss rate, etc. Enable
QoS and set DSCP value for the service to ensure its quality to be maintained.