Cell Relay Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] Re: Optical vs. Electrical Interfaces
Fahad A Hoymany <fahad@judy.cs.pitt.edu> writes: > Our network provider says they cannot provide us with an optical > interface to their network. They can only give us an E3 electrical > interface. Maybe STM-1/STSX3? E3 is a european PDH standard. > 1. Does it matter if you use electrical or optical STM-1 interface? They're equivalent in terms of the data formats. Obviously, though, you can't plug one directly into the other. > 2. If they give us an electrical interface to their network, does that mean > the actual signal over the fiber link (into their network) is electrical? > Is it even possible that an electrical signal be carried over a fiber line? Uh, not exactly. The fibers aren't conductive. It's entirely possible, though, to mux an electrical signal onto a fiber, and the telco is probably doing this. (75 ohm coax drops are probably cheaper for them ...) -- James Carlson, Consulting S/W Engineer <carlson@ironbridgenetworks.com> IronBridge Networks / 55 Hayden Avenue 71.246W Vox: +1 781 402 8032 Lexington MA 02421-7996 / USA 42.423N Fax: +1 781 402 8092 "PPP Design and Debugging" --- http://people.ne.mediaone.net/carlson/ppp |
|