Telecom Certifications
Floyd Kling
(2/30/10
Confused about Embedded Modems and Telecom
Certifications?
Maybe
this paper will help will help.
Can Embedded Modems Obtain
Global Telecom Certification?
Here is a list of the more
common certifications that may be required
for PSTN (dial-up) modems. These
requirements are only for your reference, it
is not 'gospel'. Actual requirements
vary greatly depending on your final
product. Some of these may be
required, some optional. Make sure to
check with your Certification Agency for
clarification for these and perhaps other
requirements.
(This is Work in Progress)
1. FCC Part 15
(Emissions)
-
Part 15 defines the
amount of allowable emissions that may
be generated by any electrical device.
-
-
There are two levels:
If you meet Pt. 15B
requirements, you do not need to apply
for Pt.15A. 15B is for any
equipment you might find in the home.
Embedded Modems, since
they are a component, are not required,
by themselves, to meet Part 15A/B
standards because they cannot generate
emissions until they are plugged into
the host. It is a good idea that
your embedded modem manufacturer at
least test for excessive emissions on a
simple platform to ensure there are no
'spikes' that could fail your final
product.
All products sold in the
US are required to meet this standard.
Exempt are products that contain
internal oscillators below (15Khz)
This information can be
found under FCC Regulations "Section 47
CFR 15" ... here is a link for you.
(CFR... aka Code of Federal Regulations)
http://www.access.gpo.gov/cgi-bin/cfrassemble.cgi?title=200447
2. FCC Part 68 (PTT
Attachment-USA)
-
Part 68 defines the
characteristics of any product that
connects to the telephone network.
You cannot connect any device to a
telephone network unless you have an FCC
Part 68 registration number for that
device.
-
-
Embedded modems
require Part 68 registration.
Embedded modems Part 68 registrations
ARE TRANSFERABLE to the host system.
Meaning, if you install a Part 68
registered modem into your system, you
are automatically certified if you
follow the instructions of your Modem
Module Manufacturer. (labeling, trace
routing, etc)
Embedded modems
directed for connection to telephone
networks outside of the US, Canada and
the EU ARE NOT DIRECTLY TRANSFERABLE...
In fact, many countries do not allow
Embedded Modem Modules to be connected
to foreign telephone networks unless
certified for that specific country,
within the specific final product
itself.
This information can be
found under FCC Regulations "Section 47
CFR 68" ... here is a link for you.
(CFR... aka Code of Federal Regulations)
http://www.access.gpo.gov/cgi-bin/cfrassemble.cgi?title=200447
3. DOC CS-03 (PTT
Attachment-Canada)
-
Department of Canada (DOC)
rules for connection of telephony equipment
is defined by CS-03. In almost all
respects it is Identical to FCC Part 68 and
Part 15. However, the modem must be
submitted for DOC testing even though it has
been certified by the FCC.
An IC (Industry
Canada) label is required for products
that attach to the Canadian telco.
http://strategis.ic.gc.ca/epic/internet/inceb-bhst.nsf/en/h_tt00029e.html
4. CTR-21, TBR-21 and
TIA-968 (PTT Attachment - EU)
"A company that wants
to market a product that attached to the
PSTN in Europe and some other countries,
will be required to demonstrate terminal
compliance to the TBR 21/CTR 21
requirements".
What is TBR 21 and
CTR 21 and TIA-968?
TBR 21 is the Technical
Basis for Regulation produced
by the European Telecommunications
Standards Institute (ETSI)
in response to a European Commission
(EC) mandate to harmonize standards
within the European Community for
telecommunications terminal equipment
intended for connection to the PSTN (Public
Telephone Switched
Network).
CTR 21 is the
regulatory mandate for terminal
equipment attaching to the PSTN to
conform to TBR 21 and is adopted by the
national governing bodies of the EC
members.
Comparison of TBR 21
requirements to those for FCC Part 68
and TIA-968:
While any requirements almost the same
in most cases, some limit are slightly
different (more strict) for TBR 21.
Additionally, where TIA-968 focuses
solely on preventing terminal equipment
from harming the PSTN, TBR 21 does that
but also establishes requirements for
minimum functional performance, for
example: ringer sensitivity, DTMF
frequency and inter digit timings. TBR21
does not require terminal equipment
to survive the environment electrical
surges required by TIA-968.
Status of CTR-21
Most
European countries have adopted CTR 21
as their only national requirement for
attaching terminal equipment to their
PSTN. All the countries in the EU
will accept an embedded modem that
complies with CTR-21 and CE.
Depending on
the country, the product may need to
meet additional requirements and/or
testing before it can be connected to
the PSTN. For instance, some countries
additional requirements apply only to
products that use dial pulse address
signaling. In other countries,
limitations on sending levels are more
stringent due to the lack of gain
control within the PSTN network and the
potential harm to the network if the
sending levels exceed these limitations.
Most modems will easily adhere to these
requirements.
5. UL1950 and UL60950-1
(Safety)
UL's new standard for
some products safety UL60950-1 became
effective in April, 2003. It replaced
the older UL60950, which was published
back December 2000. The UL60950 and the
new UL60950-1 where developed for the
purpose of more closely meeting the
requirements to IEC60950, which is a
global standard used by many countries.
The old UL1950 was replaced by the first
UL60950 standard for all newly developed
products, but due to numerous changes to
UL60950 (third edition), it has been
upgraded to UL60950-1. This new
UL60950-1 (First Edition) is based on
the global IEC 60950-1 (First Edition).
If you are selling your products abroad,
these new changes will allow your
products be more easily
certified/recognized by European safety
agencies, and reducing the time to sell
your products into the international
markets.
6. CE Marking (Safety)
CE Marking on a
product is a manufacturer's declaration
that the product complies with the
essential requirements of the
relevant European health, safety and
environmental protection legislations,
in practice by many of the so-called
Product Directives.
- CE Marking on a
product indicates to governmental
officials that the product may be
legally placed on the market in
their country.
- CE Marking on a
product ensures the free movement
of the product within the EFTA &
European Union (EU) single market
(total 28 countries), and
- CE Marking on a
product permits the withdrawal of
the non-conforming products by
customs and enforcement/vigilance
authorities.
For the most part, obtaining
CE certification is not too difficult.
Submit your product to an authorized
laboratory and they will take you through
the gauntlet. There are required
tesing for compatibility, emmissions and
safety that must be tested and documented.
There are also marking and statement
requirements on labels and manuals but these
are mostly a documentation issue.
7. NEBS (Telco
Equipment Standard) Network Equipment
Building System
-
NEBS requirements take
certifications to a higher level. NEBS
covers a larger range of requirements
including, safety, protection of property,
and higher operational standards.
-
-
NEBS is not required for
attaching your equipment to the telephone
network. However, Telcos may
require that certain equipment they install
in their plants be compliant to some NEBS
specifications. This means, if you are going
to sell your equipment to one of the TELCO
carriers, you should look into any NEBS
Certs they may require on your equipment.
-
-
The requirements specific to
your product depends on the category it
falls into. If you have a PSTN modem,
if there is a requirement, it would probably
be under one of these three
Telcordia
Technologies (formerly Belcore)
standards .
- GR-63-CORE
Requires that all polymeric
materials, components, and
interconnect wire and cable used
within equipment assemblies comply
with certain UL flammability
requirements.
- GR-1089-CORE
Defines electromagnetic
compatibility and electrical safety
for network telecommunications
equipments.
- GR-487-CORE,
Issue 2, Generic Requirements for
Electronic Equipment Cabinets,
replaces Issue 1. GR-487-CORE
outlines the Telcordia view of
proposed generic requirements for
electronic equipment and broadband
cabinets.
-
Passing NEBS could be an
arduous task. Regarding the modem
portion, it could be as simple as adding PTC
(resettable) Fuses (3A/600V) in series with
TIP and another in series with RING.
The exact needed components to add to your
modem will depend on what protection you
modem already has (Probably very little) and
the exact NEBS requirements needed.
-
- The 3amp fuses are
not too friendly to the modem but helps
with NEBS. A more 'modem friendly' way
may be using lower current fuses.
It is possible to
minimize the component count and still
protect the modem with a single 275V
Sidactor (Teccor P3100EB or equal)
across T/R <on the modem side> and two
polyfuses rated at .15a (Raychem
TR600-150 or equal) in series with tip
and one in series with ring <on the line
side> . Again, this will depend on
the modem, but this has passed NEBS on
some systems.
Other successes report
acquiring GR-1089-CORE by the simple
addition of 2ea Raychem Circuit
Protection PolySwitch's - TSM600-250
(600V 250ma). You can read about it
here.
http://eepn.com/Locator/Products/ArticleID/26532/Action/Issue/26532.html
8. IEC-60601 Safety
standards for Medical Devices
IEC-60601 is a series of
standards containing the requirements
concerning basic safety and essential
performance that are generally
applicable to medical electrical
equipment. These requirements may be
supplemented or modified by the special
requirements as part of or a particular
standard for certain types of medical
electrical equipment.
-
IEC
60601-1 is the safety standard and
defines the general requirements for
electrical medical products.
-
IEC 60601-1(ed2) is the second
edition of the safety standard
-
IEC 60601-1-2 is the EMC
standard for emissions and immunity.
While
IEC 60601-1 is not specifically for
modems, being an electrical device,
modems would come under this standard
when used inside (or packaged with...
i.e. USB External) a medical device.
Even though a modem may be individually
tested <and passed> for IEC 60601-x, the
final system (product + modem) would
probably need to be tested together to
fully satisfy this requirement.
A worthwhile read on the
evolution of standards.
http://www.itu.int/aboutitu/overview/history.html
Here is some helpful
information from CCL in Salt Lake City, Utah
(posted 12/06)
http://www.cclab.com/telecommunications-testing.htm
Communication
Certification Laboratory
1940 West Alexander St
Salt Lake City, UT 84119
Tel: 801.972.6146
Fax: 801.972.8432
Email: info@cclab.com
Telecommunications Testing for North
America
In the United
States, the telecommunications
testing requirement is the TIS-968-A
standard and the FCC Part 68
standard. The majority of the
telecommunications requirements are
in the TIA-968-A standard however,
some requirements are still in FCC
Part 68. In the USA the
Administrative Council for Terminal
Attachment (ACTA) administers the
telecommunications testing. In
Canada the telecommunications
testing requirement is the Industry
Canada CS-03 specification
Telecommunications Testing For Japan
In Japan, the
Japanese Approvals Institute
publishes the telecommunications
testing requirements for
Telecommunications Equipment (JATE).
JATE publishes the technical
requirements for both equipment that
connects to the public switched
telephone network and to private or
leased lines. The old common name
for the technical requirements is
the Blue and Green Books.
Telecommunications Testing For
Singapore
The
telecommunications testing
requirements are published by the
Indo-Communications Development
Authority of Singapore (iDA
Singapore). For equipment that
connects to the public switched
telephone network the standard is
iDA TS PSTN 1. For equipment that
connects to the digital network the
standard is iDA DLCN 1.
Telecommunications
Testing For Europe
The European
Telecommunications Standards
Institute (ETSI) is an independent,
non-profit organization, to produce
telecommunications standards. Based
in Sophia Antipolis (France), the
European Telecommunications
Standards Institute (ETSI) is
officially responsible for
standardization of within Europe.
These technologies include
telecommunications, broadcasting and
related areas such as intelligent
transportation and medical
electronics. Popular ETSI standards
are TBR 12, TBR 13, TBR 21, and TBR
38.
Telecommunications Testing For Hong
Kong
In Hong Kong, the Office
of the Telecommunications Authority (OFA)
operates a Hong Kong Telecommunications
Equipment Evaluation and Certification
(HKTEC) scheme. The technical requirements
are published in documents in the HKTA
series issued by the Telecommunications
Authority. Common HATA standards are 2011,
2017, and 2023 for analog and digital
equipment.
Telecommunications Testing For
Australia
In Australia, the
telecommunications testing
requirements are mainly located in
the Australia Communications
Authority (ACA) S002 standard.
Depending on the equipment type, ACA
S003, ACA S004, or other ACA
standards might apply. The
telecommunications testing in
Australia is self declaration
process.
Telecommunications Testing For New
Zealand
The
telecommunications testing
requirements for New Zealand are
published by Telecom New Zealand.
The Telecom New Zealand scheme is
call Telepermit. The most common
standard is PTC 200: Requirements
for Analog Telecommunications
Equipment. Other standards are
published for digital equipment.
End
|