Second Dialtone

1. Dialtone presented to the call originator after an access code has been dialed for access to a second, outside, telecommunications system or service.
2. Dialtone returned to the call originator after she/he has dialed an access number and has reached a switch providing access to modem, to a fax machine, to another telephone, etc.

<< Previous Word Browser Next >>
repeating coil reproduction speed reradiation resolution resonance response response time responsivity restoration return loss rf power margin	ringaround ringback signal ringdown ringer equivalency number ring latency round trip delay time routing indicator rubidium standard rural radio service saturation scan	schematic scrambler screen secondary frequency standard security security kernel security management self synchronizing code semiautomatic switching system sensitive information sensitivity	separate channel signaling serial access serial transmission service termination point shadow loss shannon's law sheath shield shift register shot noise sideband