When I plugged loop start lines into a ground start PBX they couldn't
answer the phones. I may not be remembering this right, but I think
they did ring. I think the PBX would try to ground the line when you
picked up a handset, and that resulted in a hangup on the ATA.
That's also the incident which introduced me to the Adtran Total Access.
It was the first ATA I found which supported ground start, and I've
been very happy with that product.
------ Original Message ------
From: "Chuck McCown" <ch...@wbmfg.com>
To: af@afmug.com
Sent: 11/27/2017 11:47:26 AM
Subject: Re: [AFMUG] ATA CallerID question
Any chance of a ground start vs loop start issue? Some PBXs were
ground start. Not sure how that would affect caller ID.
Is the PBX actually detecting the ringing?
From:Nate Burke
Sent: Monday, November 27, 2017 9:34 AM
To:af@afmug.com
Subject: Re: [AFMUG] ATA CallerID question
Just an Update, I put a splitter in the phone line, and caller ID works
perfect on any 'modern' handset. But still does not work on the Lucent
PBX. The customer still swears it worked with his old AT&T lines, but
seems resigned to the fact that he won't have caller ID Anymore. I
tried to sell him into a new PBX, but he "Has a truckload of spare
parts for this PBX"
On 11/9/2017 3:53 PM, Adam Moffett wrote:
Oh right....I haven't picked up the phone yet so there's nothing to
hear.
Sorry. I haven't actually used one of these telephone thingys in a
long time.
------ Original Message ------
From: "Lewis Bergman" <lewis.berg...@gmail.com>
To: af@afmug.com
Sent: 11/9/2017 4:52:46 PM
Subject: Re: [AFMUG] ATA CallerID question
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
