Would it be correct to not classify Infiniband as a telecommunications/network
port under CISPR22?
Our desire is to not perform a telecommunications/network port test on an
Infiniband copper cable. Usually Infiniband is used to connect servers with
high speed peripherals like disks or even server clusters and supercomputer
interconnects. We note that the Infiniband copper cable allows only very
limited maximum cable lengths. The slow speed Infiniband (1X - SDR) has a max
cable length of 20m, but most servers today are using the faster speed
Infiniband which has much shorter maximum cable lengths:
* 12X - SDR: 10m
* 4X - DDR: 10m
* 12X - DDR: 7m
Of course, optical Infiniband can have very long cable lengths, but an optical
cable cannot be tested for conducted emissions -- so this is not an issue.
Since CISPR22:1997+A1:2001+A2:2002, a telecommunications/network port has been
defined as:
point of connection for voice, data and signalling transfers intended to
interconnect widely-dispersed systems via such means as direct connection to
multi-user telecommunications networks (e.g. public switched
telecommunications networks (PSTN) integrated services digital networks
(ISDN), x-type digital subscriber lines (xDSL), etc.), local area networks
(e.g. Ethernet, Token Ring, etc.) and similar networks
NOTE: A port generally intended for interconnection of components of an
ITE
system under test (e.g. RS-232, IEEE Standard 1284 (parallel printer),
Universal Serial Bus (USB), IEEE Standard 1394 ("Fire Wire"), etc.) and is
used in accordance with its functional specifications (e.g. for the maximum
length of cable connected to it), is not considered to be a
telecommunications/network port under this definition.
Thanks.
--
Monrad L. Monsen
Worldwide Compliance Officer
Sun Microsystems
[email protected]
303.272.9612 Office
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