On Tuesday, October 14, 2003 8:32 AM, Eric Wieling [SMTP:[EMAIL PROTECTED] wrote: > Where does the 4 wire change to a 2 wire? >
4 to 2 wires happen anywhere the signal goes from digital to a cable pair. First the digital signal is converted to an analog 2 wire for transmit and from 2 wire analog to digital for receive. On the analog side the signals are combined from 2 pair to 1 pair. Examples would be a channel unit in a channel bank or line equipment in a telephone switch. It can also happen in an 4 wire analog to a 2 wire analog as can be used to conserve cable pair but this is not as common. Don Pobanz > On Tue, 2003-10-14 at 03:30, Mark Spencer wrote: > > Echo has nothing to do with TCP vs. UDP. It's an analog phenomenon > > that > > occurs where the "hybrid" is, where the four-wire circuit changes to > > a > > two-wire circuit. > > -- > Sample configs and more: http://www.fnords.org/~eric/asterisk/ > > BTEL Consulting > +1-850-484-4535 x2111 (Pensacola) > +1-504-595-3916 x2111 (New Orleans) > +1-877-677-9643 x2111 (Toll Free) _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
