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When only MPEG4 images are distributed, the
maximum number of distributions is determined
by the preset bit rate. When a distribution request
that exceeds the maximum number of
distributions is received, this request is denied.
When distributing only MPEG4 data
Maximum
Preset bit
number of
rate
distributions
0.6 Mbps
20
and below
3 Mbps and
4
below
6 Mbps and
2
below
Larger than 6
1
Mbps
When both JPEG and MPEG4 images are
distributed simultaneously, distribution up to two
clients for JPEG and MPEG4 respectively is
possible. However, distribution requests that
exceed a total bit rate of 20 Mbps will be denied.
Maximum
number of
Total bit rate
distributions
for JPEG
20 Mbps and
2
below
Insufficient network bandwidth
When there is insufficient bandwidth, the number
of JPEG frames (frame rate) that the client can
acquire will decrease. Delay will also occur in the
distribution of images. In the case of MPEG4,
noise interference may occur and playback may
fail.
Network Delay
When the client acquires JPEG via TCP, VN-
V686WPU will send out data while checking the
ACK from the client at the same time. For
networks with considerable delay, data cannot
be sent out until ACK is received, and therefore
the frame rate will drop. In the case of MPEG4,
noise interference may occur and playback may
fail.
Decrease in the frame rate due to network
delays can be eliminated by receiving data via
multicast.
Total maximum
bit rate
12 Mbps
12 Mbps
12 Mbps
Maximum
configurable
value (8 Mbps)
Maximum
number of
distributions
for MPEG4
2
Network Jitter
When there is considerable network jitter, delay
time may be prolonged and the image frame rate
may drop. In the case of MPEG4, noise
interference may occur and playback may fail.
Packet Loss
When acquiring images from VN-V686WPU via
TCP, packet loss may be recovered by TCP
transmission. When there is considerable delay
in the network, however, missing data may occur
and the image frame rate may drop. In the case
of MPEG4, noise interference may occur and
playback may fail.
When packet loss occurs during multicast
sending from VN-V686WPU, the image frame
rate may drop. In the case of MPEG4, noise
interference may occur and playback may fail.
List of Protocols and Port Numbers
Used by VN-V686WPU
VN-V686WPU uses the protocols and port
numbers listed below. Ensure that these ports
are allowed through the firewall when a firewall is
to be installed.
Protocol/Port No.
Source
TCP/80
TCP/5510
UDP/5510
UDP/9541
TCP/10020
TCP/10021
TCP/10023
TCP/32040
Destination
TCP/20, 21
TCP/25
TCP/110
TCP/User Setting
No.
UDP/123
UDP/User Setting
No.
Purpose of Use
JPEG/MPEG4 server,
Web Settings page, API
VSIP
VSIP
VSIP discovery protocol
(Reserved for
adjustment)
Alarm Server
FTP
Mail delivery
POP (Mail Delivery)
Sending alarm
SNTP
Sending alarm
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