Topic: Here's one for you: TVA50/TA824 and CPC

[Robc]

It's been a while! 

Does anyone know how well the TVA and 824 combo work when CPC is issued from a caller.
I definately have a decent CPC disconnect coming from my telco. A caller disconnecting takes a couple of seconds to clear a line non the 824

I DIL to the TVA for all incoming calls. A company greeting is played, then the call routes to the extensions. MOH is played.
If a caller disconnects as soon as the TVA picks up, the phantom call still goes through the motions and the TVA calls extensions.
The 824 has cleared down the call. The line is no longer in use.
My question is, how well do these two behave talking using APT integration?
Is this a fixable thing?

Cheers.

[MrGemini]

Rob, those two work well using APITS integration.
What is your question or problem? 
Is it not disconnecting on a hang up?
You made need to adjust field 420, CPC signal detection, incoming.
-----------------------------------
MrG

[Robc]

Hey MrG, long time no...

Yeah the 824 senses the CPC and clears the line but the TVA continues to run through the custom programming and calls the internal extensions.
Its as though the 824 doesnt notify the TVA of the disconect, or at least if it does, it doesnt do it quickly.
Call display on an extension shows a call coming in from 107 (the TVA) because there is no original CID. When you pickup, you just get a busy tone.
This only happens if an incoming caller disconnects early - i.e. before the call gets to an extension.

Here's my sequence -

Incoming call -> one ring -> company greeting (3 seconds) -> 'Please wait a moment' (TVA voice) -> MOH is heard whilst internal extensions ring

If the caller hangs up during any part of this sequence, the TVA still tries to put the call through only CID shows as 107 and naturally, the caller is not there.

[MrGemini]

In that case, try setting field 421, that's for the TA824 to send a CPC.
It may help.
-------------------------
MrG

[Robc]

I'll give that a try thanks!

[Robc]

Unfortunately the same issue. I was under the assumption this is all controlled via comms using APITS (or APT as the TVA refers to it!)?

I wonder if the CPC generated from my cable modems (I have 2x Arris 2 port) is perhaps not up to spec? hmm...
If CPC is working correctly from the provider, what's a general good CPC clearance time for a line on an 824?
I'm seeing the CO go free after about two to three seconds of hanging up an incoming call.

[MrGemini]

Rob, you adjust the cpc time in field 420. Default is 350 MS.
2 to 3 seconds is a LONG time for CPC
The Most time the 824 will give you is 614 MS.
I'd start looking at the modem.
Also, f you have a POTs line available you can use it for a test.
 connect it to a line port and call in,
I'll bet your problem goes away.
-----------------------------
MrG

[Robc]

The CPC fields are default.
I can hear the click of the CPC when a caller disconnects.
When I refer to the 824 taking a couple of seconds, I mean that you can see a CO light on one of the phones stay lit for a few seconds after. I was asking whether this is normal behaviour for an 824?

[MrGemini]

Yes, it's normal for any system to take a couple of seconds to clear or settle down.
-------------------------------
G

[Robc]

MrG, as always you are a great help. TYVM.

So if everything is working correctly, I assume the 824 passes CPC through or generates a CPC code (or spits out a specific code) through APITS to the TVA to drop the call. This doesn`t appear to be happening.

[MrGemini]

Rob, I'd really like to see you try it with a copper pots line just for a test.
Is this possible?
---------------------
G

[Robc]

Unfortunately the POTS got disconnected when we moved over to cable telco. I`d love to have tried that too.
I have only owned the Panasonic equipment after getting cable telco.

[CWC]

change a no dtmf response to a disconnect in main custom dialing menu

[Robc]

Hi CWC,

I have No DTMF:Exit set. I had a similar idea  
Although I think this only kicks in after the custom service has played three times and there has been no response.

[Robc]

I am going to try another round of calls to my cable co. It's possible a 4 port Arris MTA would fix the issue, I have 2x2 port 602's using 3 lines ( http://www.dslreports.com/forum/r24509289-Phone-Disconnect-Supervision-or-CPC-for-RCN-Arris-Touchstone ). Also a friend has a decent butt set. I am going to borrow it and see if I can detect CPC is being issued properly from my cable modem. I found this info to assist:

1.  If you have a Butt-set with a polarity light that's on all of the time while you're talking or you can hold the polarity test button while listening, you can watch the polarity LED. Make a call to your cell phone, hang-up the cell phone, and watch the polarity LED on your Butt-set. When there's an open loop, there's no voltage, and there's no electricity to light the LED. You can't really time it that way, but at least you'll know if you're getting the CPC, how long it comes after the outside party has hung-up, and roughly how long it is (if you have a good eye).