[H-GEN] Beware the JabberRIMy my friend (X2/K56Flex/V90)

[Ross Camm]

>From my understanding of RIMS, they take the digital signal straight from
the system 12 or AXE, before the line cards, and de-multiplex teh 2 meg
stream and convert it to analog. In other words the line cards are utilised
in the RIM, not the exchange.

Some early RIMS were 'non-intergrated' and as such did require an extra
a/d-d/a conversion, but I doubt this exists in new suburbs.

RIMS were introduced by telstra to save laying more copper cables. They
wizely prefered fibre.

So the RIMS are no doubt helping your modem transfer rates, as you only
have twisted pair to the RIM, not the exchange.

Rossco



At 07:40 PM 5/7/98 +1000, you wrote:
>A very interesting post from Christopher Burke to uq.general
>
>cheers,
>James
>
>---
>
>Path: nargun.cc.uq.edu.au!bunyip.cc.uq.edu.au!not-for-mail
>From: zzcburke at uq.net.au (Christopher Burke)
>Newsgroups: bne.general
>Subject: Beware  the JabberRIMy my friend (X2/K56Flex/V90)
>Date: Thu, 07 May 1998 08:34:21 GMT
>Organization: University of Queensland
>Lines: 30
>Message-ID: <355171fe.66381762 at news.uq.net.au>
>NNTP-Posting-Host: zzcburke.dialin.uq.net.au
>X-Newsreader: Forte Free Agent 1.11/32.235
>Xref: nargun.cc.uq.edu.au bne.general:3155
>
>Well I have found out why I will never ever get better than V34 on my
>phone - its called a RIM and is used in new estates (last 5 years).
>
>I thought to myself that being 2kms from a brand new System-12
>exchange in a new suburb with new cables that I wouldn't have the
>problem, but not the case.
>
>A RIM is an amazing 'corner cutting' device that means all our local
>phone lines get digitised onto a fibre, then at the exchange all the
>lines get converted back to analog and then into the exchange which
>immediately digitises them again.
>
>So when you see the error on your X2 modem 'Multiple CODECS in
>channel' thats what it means - only one D/A or A/D conversion allowed
>between your modem and the ISP's system.
>
>Well I've got three, and whats worse if I dial up my other line in the
>house the best I get is 19.2k - you guessed it - because there is now
>6 D/A or A/D lines.
>
>Apart from high speed modems, I will not be able to receive calling
>number display either - and who knows what other advanced facilities.
>
>So lesson of the day - if you want advanced comms facilities don't
>move into a new suburb.
>
>So if anyone else has this problem - e-mail me, maybe we will start up
>a RIM support group.
>
>C.L.Burke
>
>-- 
>
>James
>
>:>
>Computer Science/Music Student
>The University of Queensland.
><e9322899 at student.uq.edu.au>
>
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