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Timing of Data Sending
512 bytes, or in other words, 64 msec of audio data may be sent during each transmission. Send audio data at
intervals as evenly as possible. A part of the data may be lost if audio data exceeding 2 seconds are sent to VN-V26 at
one time.
9. List of Protocols and Port Numbers Used with VN-V25/26
VN-V25/26 uses the following protocols and port numbers.
Protocol / Port Number Use
TCP 20, 21 FTP
TCP 25 SMTP (Mail by Alarm Action)
TCP 80 WEB setting page, API for Getting status and changing
settings, acquisition of JPEG/MPEG-4 from VN-V25/26 by
client, acquisition audio from VN-V26 by client
UDP 80 Search for VN-V25/26
TCP 110 POP (Mail by Alarm Action)
UDP 123 SNTP
TCP 10020, 10021, 10023 reserved for internal use
TCP 32040 Alarm server
TCP 49298 Audio sending from a client to VN-V26
TCP User Setting Alarm on TCP
UDP User Setting Alarm on UDP
UDP User Setting Multicast Streaming
10. Customizing VN-V25/26's Built-in Viewer
The built-in JPEG/MPEG-4 viewer of VN-V25/26 consists of an ActiveX control. The ActiveX is available for
customized viewer.
10.1. Properties of ActiveX
- RcvMode 0 for TCP, 1 for multicast
- IP IP Address of VN-V25/26 in case of TCP
- HttpPort Port Number of VN-V25/26 in case of TCP
- MultiIP IP Address of multicast
- MultiPort Port Number of multicast
- DispWidth Width of Display
- DispHeight Height of Display
- FrameRate Frame Rate of JPEG (MPEG-4 viewer does not have this property.)
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