On Fri, 2006-03-10 at 09:34 +0530, Rony Bill wrote:
> Hello all,
>
> Some of my customers expressed reluctance to go for triband as it would
> need a rewiring of the parallel phones through the splitter. Some
> existing ones too are using the service at half the speed and even
> frequent hangups due to parallel phones. They cannot rewire their offices.
IIRC, this issue has been discussed on this list a couple of times in
the past few months.
***One and only one splitter is necessary***
This splitter should be installed right at the point where the MTNL
"twisted pair" is entering your premise. You may have to cut the wire
at the ingress point and put RJ11 connectors on each end. The splitter
one "in" connector where you put the RJ11 coming from MTNL. It has two
"out" connectors for (a) your telephone and (b) your DSL modem. You
need to connect your existing telephone wiring (with all it's parallel
connections) to (a) and believe me you are done - no rewiring etc. etc.
Connect the DSL modem to (b) using a regular twisted pair extension -
this would be the _only_ additional wiring required.
Whatever shortcomings, MTNL may have, at least on TriBand configuration
they have put out a fairly decent User Guide for the various modems they
are supporting:
http://mumbai.mtnl.net.in/triband/htm/t_details.htm#users
I found above link under the TriBand drop down menu @
mumbai.mtnl.net.in :)
If you follow the above, most of the problems your customers have had
will go away. As a side benefit, you will also see an _increase_ in
your DSL throughput and nil (almost) dropped connections.
Also, a word of caution - do not hang too many phones (with their
ringers on) off the splitter - when the phones ring they draw current
from the Tel. Exchg. I believe the DLink splitter supports a ringer
equivalence of 1.0.
> This gives me an idea that instead of rewiring the lines through the
> splitter, if we could add extra splitters at every phone point, then
> this should do the same job. Are these splitters available seperately or
> do they come with the modem only? Another option would be to copy the
> filter circuit. As I have only one working set, I don't have the heart
> to open it and tinker around but my guess is that it is a simple
> capacitor and inductor circuit. A series low impedence inductor with the
> phone output will allow low frequencey phone signals to pass and offer
> high resistance to the high freq. adsl signals. A low capacitance series
> capacitor with the adsl output will allow high freq. adsl sigs. but
> block the low freq. phone signals.
Not necessary - see above.
HTH,
--
Arun Khan
Linux is like a wigwam - no gates, no windows, apache inside
--
http://mm.glug-bom.org/mailman/listinfo/linuxers
