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In many cases, when calling from abroad, busy, reorder and other call failure tones may be played by the local switch. Modern signalling protocols like SS7 send this information digitally; thus only a ringback tone or announcement generated by a distant switch in a foreign network will ever be heard by callers from other countries or networks.
In telecommunications, an automatic callback is a computer telephony calling feature that permits a user, when encountering a busy condition or other condition where the called individual is unavailable, to instruct the system to retain the called number and to establish the call when there is an available line or when the called number is no longer busy.
The equipment can then make an intelligent choice about what to do next. If the circuits were busy, then calling again later makes sense; if the number was disconnected, then calling again is futile. As an alternative to the in-band SIT tone and recording, SS7 allows call progress advisories to be played/displayed to callers in their own language.
The reorder tone, also known as the fast busy tone, or the congestion tone, or all trunks busy (ATB) tone is an audible call progress tone in the public switched telephone network (PSTN) that is returned to a calling party to indicate that the call cannot be processed through the network.
Hardware is required to make the voice signal available to the computer equipment. Some of today's call recording software is sold as a turn-key solution with hardware. Direct recording of mobile phone calls requires a hardware adapter connected to the handset. There are many other ways to record mobile phone calls.
4. From the Dialing Options screen, check the box labeled, “I have to dial this number to turn off call waiting". 5. Confirm the proper code is listed. For most telephone services, this code is *70. Note: It’s possible your phone company uses a different code or you may not have an active call waiting subscription. In these cases, dialing ...
"If you'd like to make a call, please hang up and try again. If you need help, hang up and then dial your operator. This is a recording."). A single burst of off-hook tone is sometimes used to indicate to a party that the call is being transferred, notably at 1-800-BELL-SOUTH (800-235-5768).
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