Q-See QT Series User Manual page 40

Definitions and descriptions of network configuration:
Parameter Definition
HTTP Port The network port number for accessing the DVR from a remote location.
The default port is 85
Server Port The port number for data. The default port is 6036
Static IP
IP Address The IP address of the DVR on your network
Subnet Mask The server's subnet mask
Gateway The gateway of the router
DNS Server The address of the Domain Name System (DNS) server
PPPoE
User Name User name of the broadband account
Password Password for broadband account
SUBSTREAM
The substream is the data that is sent to remote monitoring devices. Due to bandwidth
concerns, these data streams are generally smaller than those sent directly to the DVR itself.
These streams run in parallel with the main stream sent to the hard drive and they do not
affect each other.
Substream settings are configured in the
same manner as that used for the primary
stream settings in the Record Bitrate
tab in Section 4.3 Certain settings will be
grayed out and cannot be changed due to
throughput concerns. The definitions are
repeated for your convenience:
Parameter Options
Resolution CIF
FPS 1-30
Encode VBR, CBR
Lowest
Quality
– Highest
Max Bitrate 256-2084kbps
40
What it Means
CIF = 352 x 240 pixels. Only this resolution is available in
the substream.
Frames per second. More frames makes for smoother
video but may not be possible due to bandwidth.
Variable Bit Rate versus Constant Bit Rate. VBR provides
better image quality for video with motion in it, but at the
expense of a larger file size.
Only available when VBR is selected. The higher the
quality, the more drive space required. CBR's default
setting is for higher quality.
This sets the maximum bitrate that each camera will
record at with VBR encoding selected.
PICTURE 4-24