Cell Relay Archive

[mukul@trillium.com (Mukul Katiyar)]

At a virtual UNI multiple users may be connected over a single
User-Network interface.
Cross-connects ( mux ) are used for multiplexing/demultiplexing
more than one user interfaces on the user side of the UNI
on to a single physical interface at the network side of 
the UNI. At the user side each user may signal on vpi/vci 0,5.
The a cross connect then translates these signalling channels
on to exclusive signalling channels for each interface 
at the network side of the UNI (vpi/vci - x,5).


-Mukul



> 
> Peter Field wrote:
> > 
> > Each customer signalling channel (VPi=0/VCi=5) would have to be
> > cross-connected to a unique VPi/VCi on the output, but an ATM switch
> > will only terminate signalling on VPi=0/VCi=5. The "Virtual UNI"
> > overcomes this problem by allowing multiple signalling channels,
> > creating a number of "virtual UNIs", one for each customer, by allowing
> > each customer to use a specific VPi. So customer 1 could use
> > VPi=1/VCi=5, etc ...
> > 
> 
> peter,
> 
> very good explanation of virtual uni.  this sounds kind of like
> meta-signalling.  my question is, how do the signalling channel
> assignments get made?
> 
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