Cell Relay Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] Re: Are SONET frames queued for transmission?
In article <8ltoid$nk6$1@nnrp1.deja.com>, zoramthanga@my-deja.com wrote: > Hi all, > > I am interested in calculating the delay suffered by an ATM cell > when transmitted over a SONET/SDH transmission system. The question > is: Do SONET/SDH frames get queued up at the output port? If so, > in which layer (TC sublayer or PMD sublayer)? SONET is not a connectionless datagram scheme like Ethernet. It's a rigidly timed set of pipes, where bits in any given pipe never see any contention. The delay casued by SONET ADMs should be quite predictable (I suppose this would be specified in the product literature), and to that delay you would add the equally predictable propagation delay (caused by the distance traveled at the speed of light through fiber, which is a hair under 2E8 m/s). -- Bert albert.e.manfredi@boeing.com Sent via Deja.com http://www.deja.com/ Before you buy.
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