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Cell Relay Retreat>List Archive>month:1998-Jul> msg00238



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Optical vs. Electrical Interfaces

  • From: Fahad A Hoymany <fahad@judy.cs.pitt.edu>
  • Date: 21 Jul 1998 11:49:43 GMT

Hi,

        Our network provider says they cannot provide us with an optical
interface to their network.  They can only give us an E3 electrical
interface.   We want an STM-1 interface (155Mbps) but it seems that Cisco
does not have electrical interfaces for that speedit only has optical
interfaces for STM-1.  The questions are:

1. Does it matter if you use electrical or optical STM-1 interface?
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?

Thanks in advance
Fahad