Re: Help needed with sc008 connections

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Date: Fri, 14 Nov 2003 22:56:24 GMT

In article <3fb4c503$0$14056$afc38c87@news.optusnet.com.au>, "alphadoc"
<all.the.fun@the.fair> writes:
:I have an sc008, but can't work out how to connect up from my cipca card to
:the hsj50.

  I am here assuming an 8-port SC008-AC CI star coupler.

  A-path and B-path transmit and receive coax pairs are connected from CIPCA
  to SC008, and A-path and B-path transmit and receive coax from SC008 to
  HSJ50 -- this is a total of four CI coax cable runs involved here. (Plus
  two stubby modularity cable coax runs. More on these later.)

  The A-path is a coax pair (one transmit and one receive) wired through
  the A-panel portion of the SC008, while the B-path uses a similar transmit
  and receive coax pair wired through the B-panel. The two panels of the
  SC008 are electrically isolated.

  Transmit A coax on CIPCA is wired to receive A on SC008, etc.

  Terminators are required in all unused transmit and receive connections
  on A and B panels.

  The modularity connections are typically a short coax cable from position
  1 to 4 (for configurations with CI nodes 0 through 7), with terminators
  on 2 and 5, and positions 3 and 6 are open -- the modularity is wired the
  same on both A and B panels. The modularity wiring is used (and is
  changed) when folks configuring the CISCE star coupler expander, for
  instance, or when additional panels are present (SC008-AD) and CI node
  addresses above 7 are needed.

  The CI coax needs to be very high quality cable, and anything more than
  even a gentle curve in the coax can and often will damage the cable. On
  many of the CI cabinets, there is a sticker indicating the radius for any
  curves present within the CI coax cabling; sharper bends can and often
  will cause cable damage and this can result in signal integrity problems,
  and the resulting communications errors and failures.

  Do not connect the CIPCA to the HSJ50 or to any other CI device -- the
  SC008 star coupler provides the necessary signal attenuation; the coupler
  is required in all CI configurations.

  I'll assume you know how to configure unique CI addresses on your two
  devices, as you asked about CI wiring and not about CI node addressing.

 ---------------------------- #include <rtfaq.h> -----------------------------
    For additional, please see the OpenVMS FAQ -- www.hp.com/go/openvms/faq
 --------------------------- pure personal opinion ---------------------------
        Hoff (Stephen) Hoffman OpenVMS Engineering hoff[at]hp.com

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