Moxa VPort 26A-1MP-T [27/82] Audio control

Moxa VPort 26A-1MP Accessing the VPort 26A-1MP’s Web-based Manager

3-3

Audio Control

The VPort 26A-1MP provides both audio input and audio output for voice over IP communication. Client users

can directly enable and disable the audio input (a microphone, for example) by checking the box of Enable

Audio Post on the VPort’s web homepage. You may also use the Client Setting to disable the audio

transmission.

Client Settings

Users can configure the following functions in Client Settings.

1. Encode standard: Shows the encoding algorithm currently being used. VPort 26A-1MP features built-in 2

encode engine to generate a maximum of three simultaneous video streams. Each client can select the

H.264 video streams from Stream 1, or the MJPEG/ H,264 video stream from Stream 2. To configure these

video streams, please go to:

System Configuration/Video/Video Performance.

2. Protocol Options: Choose one of four protocols to optimize your usage—Multicast (RTSP or Push) or

Unicast (UDP, TCP, HTTP).

• Multicast protocol can be used to send a single video stream to multiple clients. In this case, a lot of

bandwidth can be saved since only one video stream is transmitted over the network. However, the

network gateway (e.g., a switch) must support the multicast protocol (e.g., IGMP snooping). Otherwise,

the multicast video transmission will not be successful.

 RTSP: Enable the multicast video stream to be sent in RTSP control, which means the multicast

video stream will be sent only it receives the client’s request.

 Push: Enable the multicast video stream to be sent in Push control, which means that after this

setting is selected the multicast video stream will be sent continuously even without any client

request.

• Unicast protocol is used to send a single video stream to one client.

 UDP can be used to produce audio and video streams that are more real-time. However, some

packets may be lost due to network burst traffic, and images may become blurred.

 TCP can be used to prevent packet loss, which results in a more accurate video display. The

downside of using TCP is that the real-time delay is worse than with UDP protocol.

 HTTP can be used to prevent being blocked by a router’s firewall. The downside of using HTTP is

that the real-time delay is worse than with UDP protocol.

• Network Interface designates the connection interface for multicast video streams selection. The box

lists the current NIC interfaces. Select which NIC interface will receive multicast streams.

Once the IP camera is connected successfully, Protocol Options will indicate the selected protocol. The selected

protocol will be stored on the user’s PC, and will be used for the next connection.

NOTE

For multicast video stream settings, please refer to

System Configuration



Network



Multicast.