Duncan,
You are on the right track by doing all the board-level tests up front. Your
customer will have to integrate the blade into their ATCA application and get
the entire system NEBS certified and approved by the end-customer (Verizon,
SBC, AT&T, etc.). I would also recommend that you don't overlook testing for
the EN 300 386 requirements that will be required for deployment into European
COs.
Here is a list of tests that I would recommend you perform to help ensure your
card won't be the weak link in any system ATCA application:
- Applicable surge testing which is dependant on the type of interface, i.e.,
intra-building or outside plant. (See appendix B in GR-1089 to determine your
type of equipment.)
- ESD according to GR-1089 (inside an ATCA chassis) and GR-78 (bare board)
- Radiated emissions inside a chassis - don't forget the extended GR-1089
limits
- Conducted emissions on all cables. DC power conducted emissions may be of
interest as well.
- EFT on all cables.
- Conducted immunity on all cables
- Radiated immunity with the board installed in an ATCA chassis
- Short circuit tests!
- Any applicable safety testing (dielectric withstand, thermals)
- Drop testing - bare board
- Thermal operation - inside an ATCA chassis with the neighbouring boards
loaded to the maximum the ATCA allows (300W?).
You may want to also do the following if you have any special components or
concerns:
- Airborne contaminants - inside an ATCA chassis
- Fire spread - inside an ATCA chassis
- DC power transients from AT&T and SBC
The best thing is to read through all of the requirements. The above lists are
>from the top of my head and are probably not all-inclusive. Your specific card
may have features that would necessitate other testing (AC power fault?,
etc.). A Verizon certified test lab will be a big help in deciding on the
applicable tests. You can get the list from:
http://www.verizonnebs.com/tcppage.html.
Good luck,
Marko
Marko Radojicic
NOKIA
Enterprise Solutions
313 Fairchild Drive, Mountain View, California 94043
Mobile (preferred) +1 650.796.1131
Desk +1 650.625.2624
email: marko.radoji...@nokia.com
From: owner-emc-p...@listserv.ieee.org
[mailto:owner-emc-p...@listserv.ieee.org]On Behalf Of ext JIM WIESE
Sent: Friday, November 19, 2004 6:27 AM
To: Duncan Hobbs; emc-p...@ieee.org
Subject: RE: NEBS Compliance of Single ATCA card
Hello Duncan,
Although I don't have an answer, you might also want to post this at the
NEBS WEB Group. It is located at:
http://groups.yahoo.com/group/nebsweb
Somebody there may be able to assist you as they all deal with NEBS issues.
This was formally the NEBS Forum on IEEE but was migrated to a Yahoo group
in September.
Good Luck,
Jim
Jim Wiese
NEBS Project Manager/Senior Compliance Engineer
ADTRAN, INC.
901 Explorer Blvd.
P.O. Box 14
Huntsville, AL 35814-4000
256-963-8431
256-963-8250 fax
jim.wi...@adtran.com
From: Duncan Hobbs [mailto:duncan_ho...@xyratex.com]
Sent: Friday, November 19, 2004 3:46 AM
To: emc-p...@ieee.org
Subject: NEBS Compliance of Single ATCA card
Group,
One division of our company is looking to design an ATCA card that is
designed to be installed in telco applications, although not directly
connected to a telco network. The card is to be sold as a single card
for systems integrators and therefore requires a chassis or frame to be
able to work. The card is intended for use in ATCA applications and
because of its close proximity to telco applications it is highly likely
that our customers will expect some level of NEBS compliance.
Has anyone in the group had experience of designing a NEBS compliant
ATCA card, and If so do you have any advice or design pointers.
Also as far as I understand, NEBS is a systems level standard so our
single ATCA card cannot comply with NEBS in its own right. Is this
correct?
>From a quick scan of the internet, It appears that most card
manufacturers claim to meet NEBS on single cards, one can only assume
that they have conducted tests relevant to the card i.e. they test to
ensure that the card would not fail NEBS when installed. Either that or
they have tested the card in a NEBS compliant chassis.
Our plan is to specify and design the card to meet the relevant NEBS
requirements and to do basic tests. We would then work with any systems
integrator to provide support for the card for the NEBS testing of their
complete system (in which they have fitted our card). The claim would be
that the ATCA card was 'designed to comply' as we would not have tested
the final system.
Are there any ATCA card manufacturers or systems integrators who may be
able to comment on what they would design for or look for when
purchasing such a card? Any comments or guidance would be grately
appreciated.
Regards,
Duncan.
Duncan Hobbs, Senior Compliance Engineer
Product Compliance Laboratory
Xyratex Technology Ltd.
Havant,
Hampshire,
U.K.
PO9 1SA
tel: 02392 496444
fax: 02392 49
