| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 952.1 | | KONING::KONING | Paul Koning, A-13683 | Fri May 14 1993 13:25 | 8 |
| I don't know any of the details, but a generic answer that may help: the
SMF-PMD we use conforms to the Category I specs in the ANSI SMF-PMD standard.
There was a slight cut (1-2 dB) in the max transmit power level. That was
done to put the system into a different laser safety category and eliminate
the requirement for stringent protection (at least by USA rules; other
countries may differ).
paul
|
| 952.2 | thanks | COPCLU::SANDGREN | Keep it simple | Mon May 17 1993 11:20 | 8 |
|
Thanks for your info. But about the laser type (DFB or Fabry-
Perot), where could I find such information?
Thanks,
Poul
|
| 952.3 | | KONING::KONING | Paul Koning, A-13683 | Mon May 17 1993 13:41 | 5 |
| The product manager may know. Out of curiosity: why do you care? Whichever
it is, it conforms to the spec. If both conform, the answer may possibly
change over time as one or the other becomes more available or less expensive.
paul
|
| 952.4 | | COPCLU::SANDGREN | Keep it simple | Tue May 18 1993 06:04 | 6 |
|
Well I don't care, but appearently customer does, don't know the rea-
son..
Poul
|
| 952.5 | | ZUR01::HOTZ | Gregor; MCS, NaC Support, Schweiz | Wed May 19 1993 08:09 | 1 |
| 952.6 | DFBs are too expensive. | LEVERS::KIRK | tis a gift to be simple | Wed May 19 1993 13:02 | 16 |
| Without the purchase spec in hand, I can only provide some brief
information. DFB (Distributed Feedback) lasers are quite more
expensive than the Fabry-Perot type of lasers. The advantages of
the DFB lasers include greatly improved control of the spectral
width of the output, which means that they can be used at very
high data rates (Gigabits/second). They would be overkill for our
FDDI products.
I am seeking to put my hands on the purchase spec and will get the
manufacturers data sheet. Then I'll be able to provide more information
on the optical characteristics.
Dick Kirk
Network Interface Product Group
Network Engineering
|