24AXIS 241QA/AXIS 241SA - Audio

Full-duplexmode means that you can transmit and receive audio (talk and listen) at the same time, without having to use any of the controls. This is just like having a telephone conversation. The only controls you may wish to use are the mute buttons to turn off the sound, and the sliders, to adjust the input/output volume levels. This mode requires that the client PC has a sound card with support for full-duplex audio. If your available bandwidth is 0.2 Mbit/s or less, it is recommended that you use Half-duplexmode instead.

Half-duplexmode also transmits and receives audio in both directions, but only in one direction at a time. This means that you must select when to receive or transmit audio with the help of the push-to-talk button. To speak, press and hold the button (check that the microphone is not muted). When finished, release the button. You will now be receiving audio from the other end of the connection.

Note that the push-to-talk button is configured from AMC, see AXIS Media Control (AMC), on page 14. It is also possible to configure the push-to-talk button so that it toggles between speaking and listening modes. Half-Duplex mode is best if you only have limited bandwidth available.

If you select the Simplex - Video server speaker only mode, the speaker connected to the AXIS 241QA/AXIS 241SA plays audio, but no audio is transmitted from the AXIS 241QA/AXIS 241SA to other web clients. This could be used to provide spoken instructions to a person seen in a camera. This mode requires you to use the push-to-talk button.

The Simplex - Video server microphone only mode transmits audio from the AXIS 241QA/AXIS 241SA to a web client. It does not receive audio from any other web client. This can be used in remote monitoring, and web attractions, to provide live audio and video of a monitored situation.

When using half-duplex, the Send the sound from the active client to all other clients option transmits the audio signal from the client talking to all the other clients.

Audio Input

Audio from an external microphone or a line source can be connected to the Line/Microphone In jack of the AXIS 241QA/AXIS 241SA. The audio source can be set to Microphone or Line. If you are using a microphone, the Input sensitivity can be set to High or Low. See Technical specifications, on page 66 for the exact maximum levels.

The Enable microphone power option provides DC power for the external microphone. If you use a small electret condenser microphone such as a clip-on microphone or a PC microphone, this option needs to be enabled.

To use a high impedance dynamic microphone, DC power should not be enabled. DC power will not harm the microphone, but if you are uncertain, try switching it off and on. DC power is enabled by default. To use a professional microphone requiring 48V phantom power, you need an external power supply and must use a balanced-unbalanced converter (audio transformer) in between.

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Axis Communications 241SA user manual Audio Input
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241SA specifications

Axis Communications, a leader in network video solutions, offers a diverse range of high-performance cameras designed to meet various security needs. One of its notable models is the Axis 241SA video encoder. This device embodies the company's commitment to providing advanced surveillance technology with cutting-edge features.

The Axis 241SA is an ideal solution for organizations looking to enhance their security infrastructure by integrating analog cameras into a digital network. With its ability to support multiple video formats, this video encoder enables operators to convert traditional analog video signals into digital streams efficiently. The device supports both Motion JPEG and MPEG-4 video compression, providing flexibility in terms of image quality and bandwidth use. Users can easily adjust the settings to maximize storage efficiency and optimize network performance.

One of the standout characteristics of the Axis 241SA is its robust support for Power over Ethernet (PoE). This feature simplifies installation by allowing the device to receive power and transmit video data through a single Ethernet cable, reducing the need for additional power sources and streamlining setup processes. The encoder can accommodate four analog video inputs, allowing multiple cameras to be connected, making it a cost-effective solution for small to medium-sized installations.

Furthermore, the Axis 241SA incorporates advanced security features to safeguard video streams and ensure data integrity. The device supports HTTPS encryption and password protection, preventing unauthorized access to camera feeds and configuration settings. This level of security is crucial in today’s digital landscape where cyber threats are prevalent.

The device also comes equipped with a user-friendly web interface, simplifying the operation and configuration process for users. Compatible with various video management software (VMS) solutions, the Axis 241SA allows for seamless integration into existing security systems, enhancing overall monitoring capabilities.

In summary, the Axis Communications 241SA video encoder is a powerful and versatile tool for transitioning from analog to digital surveillance systems. With its support for multiple video formats, PoE capability, strong security measures, and user-friendly interface, the Axis 241SA meets the demands of modern security environments while providing peace of mind to users. It presents an invaluable asset for businesses and organizations aiming to bolster their security infrastructure without compromising on performance or efficiency.
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