Ericsson MD110 Digital to Analog Conversion
Chris Lee
I use a Ericsson MD110 PBX at uni and would like
to be able to connect my fax/modem to the line so
I can send the occasional fax, and possibly even
connect to the internet. Speed is not a great concern
here, I only have a 33.6Kbps modem, and I would be
relatively happy even if I only got 14,400 or 9,600 out
of it.
Is it possible to buy a device which converts the digital
line to an analog line to connect a normal modem or
handset? And if so where?
Another way I was thinking was perhaps its possible to
connect it to the 4 wires coming out of the keystation to
the handset... I assume its +mic/-mic; +spkr/-spkr, though
I've no idea how I'd use this to connect to the modem.
Any ideas or info on this would be greatly appreciated :)
Thanks in advance,
Chris Lee
(Remove the -nospam- to reply via E-Mail)
Matthew Black
says...
Chris --
When you say digital phone, I assume you have one of those 10-button
digital phones or a DBC-561. With the former, you need a TAU-2520
attachment for your digital phone. The TAU gives you data over voice.
This does NOT let you connect a modem; rather it connects to your
serial port at 9600 bps. If you want to connect a modem, ask your
telecom office to install a second ANALOG line. On our MD-110 system,
I can use a V.90 modem to achive 44K connections.
DO NOT try connecting anything to the handset...you'll break your
phone or the line card in your LIM. Not a great way to make friends
with the telecom folks. Talk to them and hear what they propose.
--matt
[if you want to send me e-mail, remove obvious item from my address]
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Chris Lee
Matthew Black wrote in message <78i30i$o...@hatathli.csulb.edu>...
>When you say digital phone, I assume you have one of those 10-button
>digital phones or a DBC-561. With the former, you need a TAU-2520
>attachment for your digital phone. The TAU gives you data over voice.
>This does NOT let you connect a modem; rather it connects to your
>serial port at 9600 bps. If you want to connect a modem, ask your
>telecom office to install a second ANALOG line. On our MD-110 system,
>I can use a V.90 modem to achive 44K connections.
It's a Dialog 2601 actually, which I assumed is digital, and I'd say it
would
have to be with Access 1 and Access 2 buttons and voicemail waiting
light?
>DO NOT try connecting anything to the handset...you'll break your
>phone or the line card in your LIM. Not a great way to make friends
>with the telecom folks. Talk to them and hear what they propose.
Ok, I'll stay away from that then :) Someone was telling me they had a
acoustic coupler type setup going with a modem to get around 14,400
connection.
Thanks for the info anyway,
Chris
Jon L. Gauthier
meant to plug into the handset jack on the telephone, and you plug your
modem into the 2w jack of the hybrid, and the handset into the third
jack.
Some PBXs digital line cards can decode DTMF signals, others can't. Even
though I used to work for Ericsson, I forget how the MD handles it. So,
you may have to dial numbers manually from the phone.
The good news is that usually, since the analog portion of the modem
circuit is usually only 6 feet long, if you are using a V.90 modem, you
usually get very high rates (50-53kb/s).
It sure beats the TAU-2520 adapter, which if I remember correctly, uses
bandwidth on the D-channel to send data. Ericsson does make another
TAU-series adapter that uses a whole B-channel, but you need a like unit
on the far side.
Chris Lee wrote:
>
> Hi,
>
> I use a Ericsson MD110 PBX at uni and would like
> to be able to connect my fax/modem to the line so
> I can send the occasional fax, and possibly even
> connect to the internet. Speed is not a great concern
> here, I only have a 33.6Kbps modem, and I would be
> relatively happy even if I only got 14,400 or 9,600 out
> of it.
>
> Is it possible to buy a device which converts the digital
> line to an analog line to connect a normal modem or
> handset? And if so where?
>
> Another way I was thinking was perhaps its possible to
> connect it to the 4 wires coming out of the keystation to
> the handset... I assume its +mic/-mic; +spkr/-spkr, though
> I've no idea how I'd use this to connect to the modem.
>
> Any ideas or info on this would be greatly appreciated :)
>
> Thanks in advance,
> Chris Lee
> (Remove the -nospam- to reply via E-Mail)
--
===========================================================
Jon Gauthier
Principal Network Engineer
(for some un-named ATM switch vendor)
===========================================================
Chris Lee
solution to my problem at http://www.ittrek.com/npkeyxs.html
Its called the novaport keyXS (Universal Modem to PBX
Phone Adapter or Digital Telephone Adapter). It supports
up to 56,000bps, and looks to have very good support for
a wide range of PBX's. It connects via the handset of the
digital phone, letting the phone handle the analog/digital
conversion.
I'm just awaiting a reply back from them on whether or not
it supports the Ericsson MD110 and Dialog 2601 phone,
but I think it will, and should be well worth it (around $99US).
I did find another company called TeleAdapt, but there price
for a similar product was around $330AUS, whereas this one
should work out to no more than $190AUS inc postage. And
the TeleAdapt only supported up to 33,600, and is battery
powered, which may be a +/-, but I like the idea of AC powered
more rather than having to change batteries every now and then
seeing as it will not really need to be carried around with me
everywhere.
The keyXS Pro is a more portable solution (around $150US i
think), and can be powered off the PC keyboard and some other
sources.
Chris
Chris Lee wrote in message <78hp54$kuh$1...@news.mel.aone.net.au>...