1. Open IE, Click Tools / Internet options. (Figure Active1.jpg)
2. Choose Security page and click "Custom Level" button. (Figure Active2.jpg)
3. In "Download signed ActiveX controls" item, choose "Enable" or "Prompt". (Figure Active3.jpg)
   
   

Before using two-way audio, make sure your camera has connected with the speakers and the microphone. After that, go to the Client settings page to see which talk button control style you chose. Toggle or Push?

If you chose Toggle, this means you must click once before talking. Clicking again will disable voice input. Push means push to talk. When you want to talk, you have to hold down the button. If you release the button, the function will disable.

rtsp://<ip address>:<rtsp port>/<access name> instead of http://<ip address>:<http port>

The bit rate is involved with audio and video setting and the complexity of image. Please download the Calculator.exe tool. The "Calculator.exe" is used to obtain the values of frame rate, video bit arte and audio bit rate of server.

The user can use the information for bandwidth evaluation and network deployment.

It means fix the electronic shutter speed to decrease color rolling on the camera. The 1/100 is used for PAL and the 1/120 is used for NTSC.

Browsers other then IE are not supported. Our 2000 series products work for those browsers but not other models. You can use URL command as the following to get the get updated snapshots for other models

http://<Ipaddressofthecamera>/cgi-bin/video.jpg

Before use the two way audio, you have to make sure the connection between the microphone and speakers. You can use the external microphone if you want.

For PZ6000 series, you have to connect the AV cable which in the package of the product first. After that, you can connect the speakers with the white one. The people in the other place can open the IE and click talk button to talk with the people around the camera. Of course, the PC should install the microphone.

The following is the illustration.

For PZ, AV output is for two-way audio. The camera supports a built-in microphone or an external microphone and speakers. You can also connect a microphone and speakers to the client side, such as to a PC or a notebook. For PT, the AV output is for audio and video. You can use an AV cable to connect the PT camera with a PC or a monitor.

Advanced Audio Coding (AAC) is an audio compression standard that has evolved from MPEG2 - Layer 3 (MP3). AAC improves upon MP3 by using better filtering methods, noise shaping and quantization resolution to produce higher quality audio files at lower bit rates.

AAC is designed for use within digital broadcasting systems. With its ability to support sample rates from 8-128 KHz, it is the future of audio in multimedia.

GSM/AMR is an audio standard widely used for audio in GPRS and W-CDMA networks. The Global System for Mobile (GSM) Adaptive Multi-Rate (AMR) voice coder is defined in the ETSI GSM 06.90 specification. The Adaptive Multi Rate (AMR) speech codec is the default speech codec for GSM 2+ and WCDMA third generation wireless systems.

GSM-AMR is based on Algebraic CELP (ACELP) and operates at eight bit rates ranging from 4.75 Kbps to 12.2 Kbps. It is developed to preserve high speech quality under a wide range of transmission conditions.

The AMR codec is designed with a voice activity detector (VAD) and generation of comfort noise (CNG) parameters to reduce the number of transmitted bits and packets during silence periods.

For PZ6000 series and IP7138/IP7139 cameras, AV output is for two-way audio. The camera supports a built-in microphone or an external microphone and speakers. You can also connect a microphone and a speaker to the client side, such as to a PC or a notebook. So when the client side user opens IE, he/she can use a microphone that connects to PC and press the talk button on IE to talk. You can hear the audio from the camera if you connect the speakers into the camera’s A/V out.

For PT 31x2 cameras, the AV output is for audio and video. You can use an AV cable to connect the PT camera with a PC or a monitor.

Before using two way audio, make sure your camera has connected with the speakers and the microphone. After that, go to the Client settings page to see which talk button control style you chose. Toggle or Push?

If you chose Toggle, this means you must click once before talking. Clicking again will disable voice input.

Push means push to talk. When you want to talk, you have to hold down the button. If you release the button, the function will disable.

Check the following items first.

1. Make sure you didn’t check the "Mute" item on the Audio page or the Network page.
2. Make sure you forward the Audio control port number, such as 5002 on your router, if you are accessing the camera via Internet.
3. Check your Client settings page of the camera; make sure you didn’t disable Audio.

The camera has an internal microphone. You can see a hole near the lens of the camera; it is the internal microphone. You can also use an external microphone. You can receive the audio around the camera by using the internal microphone.

If you want to receive the audio from far away, then use an external microphone. Take the picture for example. If you are in the dining hall, then you can use an internal microphone. If you want to speak from the living room, then you must use an external microphone.

There are many microphone types. Our cameras only support condenser and dynamic microphones. It is best if the microphone and speaker’s accord with the following specs.

External Microphone interface: 3.5mm stereo type jack,

• TIP/RING (L/R): signal (10mV ~ 100mV) with 3.3VDC bias (max 1mA)
• Sleeve: Ground
• Input impedance: 75ohm
• Suggested microphone: Condenser (Electret) microphone

AV out Interface: 3.5mm stereo type jack

• TIP (L): line-level audio signal (max 0.9Vrms)
• RING (R): composite video signal (1Vrms)
• Sleeve: Ground
• Output impedance: 100ohm

As you know, in our products you can select constant (fixed) bit rate to control the amount of the video stream data per second. If you select fixed quality, the amount of video stream data would be floating depending on the motion in the video. (From 1Kbps~300Mbps) Fixed quality uses a higher bit rate during fast motion scenes and a lower bit rate during slow motion scenes.

Constant (fixed) bit rate means a constant bit rate must be used. The available bandwidth is fixed, like videoconferencing delivered on channels with fixed bandwidth. So you may lose some images during fast motion scenes.

Please refer to "Bandwidth file" to calculate the bandwidth requirement.