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,