VisorNET
" Video & Audio transmission equipment for security applications and services "
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Serial ports and alarm inputs & outputs |
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VisorNET versions and optional configurations |
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Audio |
Technical Specifications |
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AUDIO |
Full duplex two way audio communication: The VisorNET 4C equipment, when equipped with an MPEG4+audio internal board, allows the monitoring application (VisorCENTRAL) to establish a two-way full duplex audio communication with the location where the VisorNET is installed. For this audio communication, VisorNET uses state of the art voice over IP technology, which assures the best possible performance in terms of quality and bandwidth usage.
| Audio technical specifications | |
| Hardware | Plug-in internal daughter board for VisorNET 4C equipment |
| Audio inputs / outputs | One (1) channel and four (4) channel board available (each channel being a pair of microphone input and speaker output). |
| Type of connectors | Mini-jack connectors accessible in the back panel of the unit |
| Transmission protocol | H.323 (voice over IP) |
| Audio compression | G.723.1 |
| Bandwidth requirements | 5.3 Kbps |
| PC requirements at the central side | PC with sound card, microphone and speaker |
Note: VisorNET 2C units do not support audio internal daughter boards. Check with your Telsec representative about the possibility of upgrading your existing VisorNET 4C to support audio.
Hardware versions with 1 or 4 audio channels: The basic audio option for VisorNET 4C comes with one channel of audio (one microphone input and one speaker system output). The advanced audio daughter board holds four different channels of audio, acting as an audio multiplexor ; when using this advanced version, the VisorCENTRAL application can select which of the 4 audio channels to connect to, being also able to switch between channels as needed.
Voice over IP technology: VisorNET uses voice over IP technology and thus, it is subjected to the same set of technical requirements than any voice over IP audio system. According to this international audio standard, a certain number of ports need to be open in order for the communication to be established (firewalls, proxy servers and routers using NAT might have an effect on the VisorNET audio capabilities; ask your Telsec representative about the different scenarios were audio can be used or call Telsec to discuss if your current IT setting will work or what changes will be needed).
| Voice over IP technical specs | |
| TCP/UDP ports used | NetMeeting ports (see the documentation section for further information). |
| IP addresses |
Public IP address required at the VisorNET side (NAT supported) Public IP address required at the PC establishing the audio connection |
| Dynamic Bandwidth Control | YES |
| Full duplex | YES (quality depends on internet and bandwidth conditions and delays) |
Audio recording: Telsec is currently working in adding audio recording capabilities to the VisorNET system so that, additionally to making video recording onto VisorDISK units, the VisorNET will now also be able to send one audio stream to the VisorDISK so that it can be archived together with the video.
| Audio recording ( available 3Q2004 ) | |
| Recording device | VisorDISK (audio streams are sent to the VisorDISK through the network and are stored in the VisorDISK hard drives together with video). |
| Synchronization with video | Non real time synchronization (under normal circumstances, audio and video will have a time offset no higher than 1/4 of a second). |
| Audio storage format | G.723.1 is archived together with video in quicktime's MOV format |
| Storage space requirements |
1 hour of continuous audio recording = 2.5 MBytes 1 day of continuous audio recording = 59.4 MBytes 1 month of continuous audio recording = 1.8 GBytes |
Compatible with VisorCENTRAL application: The audio capabilities of VisorNET were designed to be used through the VisorCENTRAL applications as an enhancement to its video monitoring capabilities. Audio from the VisorNET is not compatible yet with VisorPORTAL and thus, it is not accesible yet for VisorPORTAL users.