Re: [openss7] OpenSS7 for LMC1200P

["Brian F. G. Bidulock" <bidulock@openss7.org>]

Gualtiero,

I have built support for Q.703 Annex A into the L2 piece which
you should see posted this weekend.  You might consider running
the LMC1200 unchannelized (at full 2Mbps rate) under Q.703 Annex
A operation.  One of the reasons that it wasn't on my original
list was because I though it was unchannelized.  I don't know if
that would meet you final needs or not.

I should be posting the ACB56 and UDP Emulation link drivers to
the website this weekend.  Check back on Monday and take a look
at them.  I think that you will find that they provide all of
the STREAMS mechanisms for you: all you have to do is provide a
small set of missing functions in the driver; the L2 state
machines are already there for you.  The ACB56 driver will be an
excellent (although only 56kbps link) example of this.

The UDP emulation is written to provide some simple traffic
shaping to 1.544 or 2.0 Mbps and will perform Q.703 Annex A
emulation.  Between the two, you should be able to bring up a
full 2.0Mbps rate driver fairly quickly.

Also, you can check with LAN Media Corporation, but I believe
that the LMC1501, 2, or 4 cards provide channelized HDLC on 1, 2
or 4 T1 spans (respectively).  I don't know about E1 support,
and the cards were listed a while back as cPCI rather than PCI.
Depending on your needs, another card might be a better choice.

If you're going into the cPCI realm, you might consider that we
will be doing much work with the PT 388 cards (also on the links
page).

Channelized T1/E1 cards in regular PCI form factor seem rather
rare.

--Brian

On Thu, 14 Dec 2000, Gualtiero Asunis wrote:

> 
>    Gualtiero,
>    I will await your answer.  Let me know if I can provide any more
>    information which might help you come to a decision.
>    --Brian
>    
>    Hello Brian,
>    
>    I need to evaluate how much time is necessary to develop driver. I
>    don't know how Linux communicate with LMC1200 and how I can read bit
>    stream from LMC1200, to process it.
>    
>    The only documentation I found is about drivers supplied with board
>    (but I can't use them because they execute HDLC without separate 32
>    channels) and about the embedded chips. I don't know, for example, how
>    approach to internal registers of chip. How many months will I need to
>    understand how to approach to signalling channel of 2Mbps frame?
>    
>    
>    
>    Gualtiero

-- 
Brian F. G. Bidulock    ¦ The reasonable man adapts himself to the ¦
bidulock@openss7.org    ¦ world; the unreasonable one persists in  ¦
http://www.openss7.org/ ¦ trying  to adapt the  world  to himself. ¦
                        ¦ Therefore  all  progress  depends on the ¦
                        ¦ unreasonable man. -- George Bernard Shaw ¦