Remember, the signal comes between rings. Unless you are listening on a butt set in line or watching the info pass through a switch you wouldn't see or hear it. The only reason I remembered between first and second is sitting at a class 5 switch trying to figure out why caller ID was failing on a feature group D trunk group and seeing them come through after one ringy dingy.
On Thu, Nov 9, 2017 at 3:46 PM Adam Moffett <dmmoff...@gmail.com> wrote: > Is it at an inaudible frequency? If so, then it wouldn't make it through > 2600hz bandpass filters would it? Or maybe it's audible, but so short you > don't notice it? I'm fuzzy on this. > > I probably shouldn't ask. I don't need to know that much about POTS > anymore. > > > ------ Original Message ------ > From: "Lewis Bergman" <lewis.berg...@gmail.com> > To: af@afmug.com > Sent: 11/9/2017 4:40:57 PM > Subject: Re: [AFMUG] ATA CallerID question > > More info than anyone probably wants to know. I found this about the > original question: > Caller-ID Signaling > > According to Telcordia specifications, CND signaling starts as early as > 300 mS after the first ring burst and ends at least 475 mS before the > second ring burst > > From here: http://www.tech-faq.com/caller-id.html > > On Tue, Nov 7, 2017 at 9:29 PM Adam Moffett <dmmoff...@gmail.com> wrote: > > I did not know that tone contained modulated data. I just thought it >> was a noise you wouldn't ignore. >> >> That's a fun fact to have. >> >> >> ------ Original Message ------ >> From: ch...@wbmfg.com >> To: af@afmug.com >> Sent: 11/7/2017 4:39:27 PM >> Subject: Re: [AFMUG] ATA CallerID question >> >> >Monitor the line for the data burst. It is the exact same modulation >> >method as the emergency alert system you hear squawking on the TV >> >before the beep and thunderstorm warning. >> > >> >I think it comes before the first ring or right after the first ring. >> >Some of the original display units rectified and stored ring voltage >> >for power so it may need the ring first to power the display box then >> >the data. >> > >> >In any event, you can hear it if you have a butt sett with line monitor >> >mode. >> >Bell 202 is correct. >> > >> >-----Original Message----- From: Nate Burke >> >Sent: Tuesday, November 7, 2017 1:58 PM >> >To: Animal Farm >> >Subject: [AFMUG] ATA CallerID question >> > >> >At a customer, I just hooked up a Cisco SPA122 into an Ancient Lucent >> >PBX system. The customer says that caller ID is not coming through, >> >but >> >it used to work with his old AT&T Lines, and it appears to be hitting >> >the ATA Properly. Is there a setting on the ATA that needs to be set >> >that older systems may be looking for? >> > >> >The only settings I see for Caller ID in the ATA are Caller ID Method, >> >currently set to 'Bellcore(N.Amer,China)' and Caller ID FSK Standard, >> >set to 'Bell 202' I've never had to mess with those settings before. >> > >> >Nate >> >>
