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.

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.

Purpose of Use

 

 

Source

 

 

 

TCP/80

JPEG/MPEG4

 

acquisition, Web

 

Settings page, API,

 

Sending/Acquisition

 

of sound

 

 

TCP/5510

VSIP

 

 

UDP/5510

VSIP

 

 

UDP/9541

VSIP discovery

 

protocol

 

 

TCP/10020

(Reserved for

TCP/10021

adjustment)

TCP/10023

 

 

 

TCP/32040

Alarm server

 

 

TCP/49298

Sound data reception

 

 

Destination

 

 

 

TCP/20, 21

FTP

 

 

TCP/25

Mail delivery

 

 

TCP/110

POP (Mail Delivery)

 

 

TCP/User Setting No.

Sending alarm

 

 

UDP/123

SNTP

 

 

UDP/User Setting No.

Sending alarm

 

 

26