JVC VN-X35U Instructions Manual page 26

Connection / Installation
Network Requirements
(continued)
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.
There may be a longer delay or interruption in
the audio.
Network Delay
When the client acquires JPEG via TCP,
VN-X35U 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.
Audio may be interrupted.
Decrease in the frame rate due to network delays
can be eliminated by receiving data via multicast.
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.
Audio may be interrupted.
Packet Loss
When acquiring images from VN-X35U 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.
Audio may be interrupted.
When packet loss occurs during multicast
sending from VN-X35U, the image frame rate
may drop. In the case of MPEG4, noise
interference may occur and playback may fail.
Audio may be interrupted.
26
List of Protocols and Port Numbers
Used by VN-X35U
VN-X35U 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
TCP/49298
Destination
TCP/20, 21
TCP/25
TCP/110
TCP/User Setting No.
UDP/123
UDP/User Setting No.
Purpose of Use
JPEG/MPEG4
acquisition, Web
Settings page, API,
Sending/Acquisition
of sound
VSIP
VSIP
VSIP discovery
protocol
(Reserved for
adjustment)
Alarm server
Sound data reception
FTP
Mail delivery
POP (Mail Delivery)
Sending alarm
SNTP
Sending alarm