The DTMF tones are quite clearly (and loudly) heard in the earpiece - which is quite off-putting but excusable I guess, but I'm not 100% sure it's detecting the number of pulses correctly, and so dialling the wrong number. I've tried it on my 746 and 741 phones and in both cases it never dials the correct numbers. I ordered one but it seems not to work terribly well. The 3rd generation of dtmf to bellcore fsk caller id converter now in smaller size, more compatible and more accuracy.I wonder whether anyone has had any experience of the cheap(ish) Chinese pulse-to-DTMF converters on eBay such as the one in the photo. * Smaller size (67 x 32 x 27 mm) * Easy Installation Main features of this converter :* Convert DTMF to Bellcore FSK system * Compatible with most of the PABX exchange systems like NEC and Alcatel etc.
If you live outside USA and you have cordless phones from USA, or you have PABX system in Bellcore FSK system, then you need to have this convertor to have the Caller’s Number ( Caller ID ) displayed correctly at your phones.
It is Dual-Tone Multi-Frequency signaling ( DTMF ) for some European countries like the India, Finland, Denmark, Iceland, the Netherlands, Belgium, Sweden, Brazil, Saudi Arabia or Uruguay etc., and also for South American States, while it is Bellcore FSK for United States. There are three formats for caller ID system in the world, the DTMF, ETSI FSK and Bellcore FSK. Brand New ! The 3rd Generation of DTMF to Bellcore FSK Caller ID Converter Now in smaller size, more compatible and more accuracy ! Product Description DTMF to Bellcore FSK Caller ID Converter.
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