Any
one
know how to daisy chain ISDN2E
I have
one
socket going to my exchange
The
other
goes t a bridge
I
would
link t add a third outlet for my portable which has an ISDN card so that I
can
set it up ay home
Any
ideas
thanks
Mike
Sent from Home
-----Original
Message-----
From: patrickl@xxxxxxx
[mailto:patrickl@xxxxxxx]
Sent: Sun 15 Jul 01 21:58
To: ukha_d@xxxxxxx
Subject: [ukha_d] Re: internal
phone systems..
The cybergear gold is a very nice piece of kit for ISDN use. It will
support the delivery of CLI (caller id) t ordinary analogue
handsets, which is unusual. (ISDN exchanges will support
both "ordinary" analogue handsets with the correct adapter,
or
digital ISDN handsets which can be extortionately expensive, and may
require independent power).
For conventional analogue lines, the Olychrom (sp?) is well thought
of. Solwise (www.solwise.co.uk) also carry a reasonable range. Expect
to pay 200-300 for a 2+8 configuration (2 exchange lines routed t 8
extensions).
If you use an analogue modem, be aware that the cheaper PBX's may
limit your maximum connection speed. I don't know of any 2+8 PBX's
which support CLI, although there are 1+4's which do.
If you are adventurous, it's well worth trawling the second hand
office market for an old PBX - but be wary of any which aren't
supplied with full user and installation documentation. Avoid the BT
Ambassador exchanges, which are very common on the second hand
market, but only work with special handsets and are
particularly "clunky" t use.
In all cases, you will need to star wire your extensions (ie home
runs from the point where you install the exchange) - in contrast to
the usual daisy chain. When using analogue handsets (as opposed t
ISDN), 2 wires are sufficient (pins 2 & 5 on the BT socket) - but
you
will need to fit a master socket to each extension t ensure the
handset rings correctly. For details of how to wire digital ISDN
handsets, look at Peter Strangman's home page
(www.adelheid.demon.co.uk). He also has a useful comparison chart to
assist in selecting PBX's and a list of vendors.
Until recently it used t be a BT requirement t have a PBX
maintained by an approved installer. This is no longer the case,
although some suppliers may try t brow beat you into
submission.
Finally, you may want t make special provision for power cuts -
either a handset directly wired t the exchange line, or a UPS to
power the exchange. Some (most?) exchanges will provide "pass
through" in the case of failure, connecting a specific extension
to
the exchange in the case of powerloss.
HTH
Patrick
--- In ukha_d@y..., "John McManus" <john.mcmanus@b...>
wrote:
> This would probably most easily be done by a PBX (private branch
exchange).
> There may well be ones out there that support normal analogue
exchange lines
> ... but I only have experience of the ISDN variety.
>
> The PBX that I have is from Network Alchemy... it takes 2 ISDN2e
circuits (4
> channels) and provides 16 extensions. They also do an entry
model
> (Cybergear Gold) for about £300? that takes an ISDN2e / Home
Highway in and
> provides 6 extensions out (for your normal house phones).
With
the
> Cybergear you can call from one extension t another, transfer
calls, have
> hunt groups etc. Can also act as a (simple) ISDN
router.
It
provides TAPI
> integration t the PC desktop, PC based voice mail and lots of
other stuff.
>
> There are a number of other systems that have similar
functionality... but I
> don't know much about them.
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http://www.automatedhome.co.uk
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