Cell Relay Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] Max number of Virtual UNIs at a UNI 4.0 interface?
I'm looking at some potential access network architectures for a new product (similar to a DSLAM). If the system uses virtual UNIs to allow users to do SVC signaling without doing switching in the access network (leaving the real work to the first ATM switch), then is the system limited to 256 subscribers per UNI 4.0 interface because each subscriber requires their own VP and there are only 8 bits of VPI in the UNI ATM header? If I want to support more than 256 end users (pretend they are xDSL subscribers connected to an access multiplexer), do I need to use more than one UNI 4.0 interface? Or is there a way to use the standard 12-bit VPI (without the GFC field) at a UNI 4.0 interface and use a higher speed interface (rather than multiple lower speed interfaces)? Any opinions from the product developers and operators? Thanks in advance. -Bill Krause, Electrical Eng., Aztek Engineering, Boulder, CO USA |
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