Woops... I failed to include this would be over Fiber :P Sorry... I sent this CC to the fiber list as well, so that was an oversight.
Matt Hoppes Director of Information Technology Indigo Wireless +1 (570) 723-7312 On 5/20/13 11:45 AM, Fred Goldstein wrote: > On 5/20/2013 11:12 AM, Matt Hoppes wrote: >> Hi All, >> Is anyone aware of a MUX that will let me MUX together T1s (needs to be >> transparent) and Ethernet? I need to MUX them together on one end, and >> then unMUX on the other end. Again... it all needs to be transparent. >> > > What is the underlying physical layer, asynchronous (Ethernet, including > a typical WISP radio) or isochronous (like a DS3)? There are different > muxes for each. In the RAD catalog, for instance, the RICi family > passes Ethernet over isochronous circuits (like native T1s and DS3s). > The IPmux family passes T1s over native Ethernet. > > Now one more thing to think about. If you're carrying T1s > transparently, you may need to pass the timing. I've run into cases > where the VoIP provider didn't realize that supplying the timing was > required. Often the remote end T1 can just be clocked locally, and > there's no need to pass timing across the Ethernet. But if the customer > needs you to be a timing source, you may need to use one of these two > methods: > > In one case it is straightforward -- when the physical layer is itself > isochronous (self-clocked); that's how SONET and DS3 work, for instance. > A mux for that can just pass timing natively, if you set it up right. > > If you're carrying the T1s over an asynchronous native medium like > non-synchronous Ethernet (some Ethernet PMDs are synchronous and pass > along timing, especially at 10G, but most aren't), and the T1s need > timing, then you may need to supply the timing independent of the > physical layer. The usual way to do this is PWE3, Pseudowire Emulation > over Ethernet, which is what the IPmux does; it's an option in Cisco > (and many other) media gateways too. > _______________________________________________ Wireless mailing list [email protected] http://lists.wispa.org/mailman/listinfo/wireless
