<div class="gmail_quote">2011/12/9 Daniel Ferrer <span dir="ltr"><<a href="mailto:daniel@teledata.com.uy">daniel@teledata.com.uy</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
esa central para realizar llamadas. El proveedor de la NEC dice que hay que cambiar la señalización a DTMF, y no se si se refiere a DTMF-R2, pero no tengo claro cual es la diferencia contra el MFC/R2. Los tonos no son Multi-Frequency (son Dual-Tone) y no es Compelled ?<br>
</blockquote><div><br></div><div>En MFC-R2 la sequencia de tonos se transmite usando un cierto set de frequencias (pares de frequencias) conocido como MF (que no es lo mismo, que otro set de pares de frequencias conocido como Bell MF). Usando este set de frequencias se transmite DNIS, ANI y Categoria de abonado.</div>
<div><br></div><div>En DTMF-R2 los tonos son tambien pares de frequencias, pero frequencias distintas (y son iguales a las de cualquier telefono analogo que transmite digitos DTMF). La informacion transmitida se reduce a el DNIS unicamente y es sequencial uno digito tras otro sin esperar ningun tipo de tono de confirmacion.</div>
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