How ISDN MUX will work?

[satyagolti]

Hiii Good Morning

Any one can give write up on "How ISDN Mux ( Q-BRI)will work "

there is one question from my Clint when we are ein call with 4Lines in middle of the meeting if 2lines goes bad how bandwidth distribution will happens?

Thanks -Satya

[senthil]

Hi
Q/BRI or IMUX will have 4 numbers S/T interface cards inside. Each S/T interface card will handle 128 Kbps bandwidth . Suppose if you connected 4 lines means you connected four Physical ISDN lines that’s from the ISND Network Terminination Unit to your IMUX. So each 128k will be mux it and goes inside to the hardware unit (DSP) in videoconferencing system. Assume suppose you are connected with IP network sending packets to the DSP to do Coding and Encoding. In IP network the packets will be send in TX and Receive in RX. The same concept is in ISDN also. Like after termination of the ISDN Lines, the ISDN NT will send packets (TX) and receive packets (RX). In between two NT’s the packets will converts in to Digital signal format and send.

Dynamic Allocation of bandwidth

This feature should support your endpoint Based on the endpoint support if any one of line failure in between the meeting the endpoint will automatically adjust the bandwidth.

senthil

[satyagolti]

ThankX senthil

any some more comments

[pzielie]

>The user enters the phone number of the far end Codec and specifies bandwidth of the call (6 Channels or 384kbps)
>The Imux dials first ISDN phone number
>Once the first channel connects the dialing Imux requests 5 more dial numbers from the far end Codec (these numbers are the local dial number as opposed to the SPIDs)
>The dialing Imux dials the remaining 5 numbers
>When all channels are connected the Codecs perform a capabilities exchange across the bandwidth and negotiate the audio and video standards used