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| Re: A ''Shocking'' Lawsuit (1393548) | |||
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Re: A ''Shocking'' Lawsuit |
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Posted by pragmatist on Mon Apr 25 20:44:58 2016, in response to Re: A ''Shocking'' Lawsuit, posted by nasadowsk on Mon Apr 25 20:29:57 2016. If it was on a Rolm phone it was digitally derived sound, nat conventional dial tone, if it was a conventional phone it got dial tone from the Rolm in the regular manner, even if it sounded funny. If I remember, the standard dial tone is an amalgam of a 350 + 450 hz tone. Funny thing about dial tone is that on most plain telephone circuits, it is not really necessary, but having it there lets the subscriber know that the line circuit in the CO or PBX has seen the off hook condition and is ready to receive dialed digits. If you delay dialing, it releases the tone receivers/registers/or digital decoder, since they are a shared resource, after a pre programmed period of time. It gives you the alert tone the same way Telco would give you a recorded "there appears to be a receiver off the hook, if you'd like to make call, please hang up and dial again" The other phenomena, the call back/tone is usually the result of what is essentially an uncompleted unsupervised transfer. Or so the switch thought. |
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