Question about Northwestern Bell 20270-1 Corded Phone

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I purchased a 20270 for my mother out of state and she is having a problem with the caller ID not working....is there some sort of switch she has to turn on? Thanks

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Why is caller id not working on phone after switching to AT&T uverse internet and phone?


Do they offer caller ID with that type of service? If so they should be able to fix that for you. You are now VOIP and not real sure how caller ID works behind that. There is a data burst sent after 1 ring on regular telephone service..

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Hello Samiran mandal, here is a solution.I purchased one cordless telephone (Siemens Gigaset) in Germany. I also had the same problem, caller-id did not work. I purchased this telephone because we can set different ringtones for different caller groups. But, if caller-id doesn't work, this feature also doesn't work. I had gone through internet and finally found that CA electronics, Bangalore has it and got it through courier (I live in Pondicherry). It worked flawlessly for two years. Then it stopped working. For 'no reason' I ordered for a 'caller-id' unit on ebay for Rs.75/- (+ Rs.75 shipping). I just got the unit and fixed it to my line. Very very surprisingly, my cordless telephone is now showing caller info. This is a real surprise to me. By the way, caller-id unit is "Eurotel" make, DTMF/FSK caller-id. I feel this is very nice solution. The 'caller-id' unit is nice (backlit display) and also there is no need of converter for using the caller-id feature of your foreign telephone. I connected caller-id between the line and telephone. That's all. Enjoy.

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1 Answer

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I purchased one cordless telephone (Siemens Gigaset) in Germany. I also had the same problem, caller-id did not work. I purchased this telephone because we can set different ringtones for different caller groups. But, if caller-id doesn't work, this feature also doesn't work. I had gone through internet and finally found that CA electronics, Bangalore has it and got it through courier (I live in Pondicherry). It worked flawlessly for two years. Then it stopped working. For 'no reason' I ordered for a 'caller-id' unit on ebay for Rs.75/- (+ Rs.75 shipping). I just got the unit and fixed it to my line. Very very surprisingly, my cordless telephone is now showing caller info. This is a real surprise to me. By the way, caller-id unit is "Eurotel" make, DTMF/FSK caller-id. I feel this is very nice solution. The 'caller-id' unit is nice (backlit display) and also there is no need of converter for using the caller-id feature of your foreign telephone. I connected caller-id between the line and telephone. That's all. Enjoy.

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Caller ID in the USA uses the FSK standard. For the most part, callerID in India uses DTMF (although I have heard of some FSK usage).

I am currently living in New Delhi and have an Airtel home phone line.My switch uses DTMF. I went to the Palika electronics bazaar (I awaysuse shop number 266 near gate 5, they seem to be a little kinder toforeigners as far as the "final price") and purchased an DTMF to FSKconvertor. My US phones now show caller ID information, although usingUS number seperations ### - ### - ####. I paid R500 but you couldprobably get it for around R400 if you are willing to put in the timebargaining. It looks like they are also available on Indian Ebay.

Mine says UST001B. It looks like these are low volume items becausethey stuck the components into a box marked "DSL Splitter" It works toconvert the caller ID as advertised.

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US phones use Bellcore FSK caller id. India uses DTMF caller id. Buy a DTMF- FSK converter at a telecom shop.

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Jus Switch off the phone and Start it again. Then notify me about the changes in the phone.

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I too purchased an Uniden phone for India. Everything except the caller ID works fine. The caller ID wont work as the technology used in India is different. Try purchasing a FSK to DTMF converter or a separate caller ID box.

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I must have gotten your unit. Mine did work ONCE after it had been installed for about a week. But it never worked again and we pitched it. Buy something else.

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1 Answer

Caller id


Caller ID in the USA uses the FSK standard. For the most part, caller ID in India uses DTMF (although I have heard of some FSK usage).

I am currently living in New Delhi and have an Airtel home phone line. My switch uses DTMF. I went to the Palika electronics bazaar (I aways use shop number 266 near gate 5, they seem to be a little kinder to foreigners as far as the "final price") and purchased an DTMF to FSK convertor. My US phones now show caller ID information, although using US number seperations ### - ### - ####. I paid R500 but you could probably get it for around R400 if you are willing to put in the time bargaining. It looks like they are also available on Indian Ebay.

Mine says UST001B. It looks like these are low volume items because they stuck the components into a box marked "DSL Splitter" It works to convert the caller ID as advertised.



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