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 > >
